Informacije Midem-journal of Microelectronics Electronic Components and Materials, Dec 15, 2017
In this paper an operational transconductance amplifier with temperature compensation is presente... more In this paper an operational transconductance amplifier with temperature compensation is presented. It is a voltagecontrolled current source, which operates in an open loop configuration with a single output connected to a resistive load. The amplifier is internally compensated to keep the gain stable over the -40 °C to 125 °C temperature range. It features low input voltage noise and operates at supply voltages from 3 V to 5.5 V. Additionally, an internal 1.21 V bandgap reference is used to ensure a stable internal voltage reference point. The active area of the proposed integrated circuit designed with 0.18 µm Bipolar, CMOS, DMOS (BCD) technology is 750 µm x 260 µm. It consumes 423 µA of current and it has 8.87 nV/SHz of input noise at 500 kHz. The resulting simulated voltage gain is 40 dB and variations are less than ±0.3 dB over the temperature range of -40 °C to 125 °C.
Informacije Midem-journal of Microelectronics Electronic Components and Materials, 2015
The paper discusses an inductive microsensor system for displacement measurement comprising micro... more The paper discusses an inductive microsensor system for displacement measurement comprising microtransformers. The primary windings of the microtransformers are excited with an AC source with a frequency of several MHz. The microtransformers are fabricated in internal metal layers of an integrated circuit using a conventional 350 nm commercial CMOS process, along with corresponding circuits for the processing of the microtransformers' output signals. The major advantage of such system is its costeffectiveness due to its straightforward fabrication and the absence of the need for an external field generator, such as permanent magnets at Hall Effect encoders or a light source at optical encoders. In a linear incremental encoder application, microtransformer output signals are modulated by a metal measurement scale positioned over the integrated microsystem, resulting in a combination of amplitude and phase modulation. The integrated circuit employs a fullydifferential measurement channel with three-stage amplification and a mixer implemented with a Gilbert cell: the signal is demodulated using synchronous demodulation. A prototype microsystem was designed, fabricated and evaluated, demonstrating a sensitivity of 0.99 V/mm with a copper target at an approximate microsystem-target distance of 200-250 µm.
In this paper, we performed a comparative analysis of the electrical impedance and optical method... more In this paper, we performed a comparative analysis of the electrical impedance and optical methods performance for a field soil characterization. The study was optimized by reducing the texture variation and the influence of the unknown soil elements that are not in the focus of this research. The research dataset was created using pure soil from two agriculture farms and fertilized with fertilizers selected by farmers. The impedance spectrometer developed in our laboratory was used to perform the impedance measurements between 30 kHz and 14 MHz showing promising results. Optical measurements were performed within the ultraviolet-visible-near infrared (UV-VIS-NIR) range. The obtained results indicate that it is possible to perform low-cost soil analysis with high accuracy for a field fertilization analysis.
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
The paper deals with the optimization of the integrated planar micro-coil characteristics with re... more The paper deals with the optimization of the integrated planar micro-coil characteristics with respect to maximizing the generated magnetic field amplitude and its uniformity along the region of interest. The integration calls for as efficient realization as possible otherwise the electrical heating would contribute to reduced performance of the integrated system in which the micro-coil is used. A multiobjective optimization is performed with respect to efficiency and uniformity of the magnetic field distribution. It is optimized in a range of the technological rules to be used in application where precise magnetic field measurement is required.
Denervated muscle fibres were stimulated electrically with needle electrodes introduced close to ... more Denervated muscle fibres were stimulated electrically with needle electrodes introduced close to a recording single fibre electrode. The denervated muscle fibre could be driven with rates up to 100 Hz. The jitter was large at threshold but low at suprathreshold stimulus strength. There was evidence of discrete low threshold sites along the denervated muscle fibre, seen as stepwise latency change on smoothly changing stimulus strength, ephaptic activation from other fibres and also as extra-discharges originating from such sites.
The paper describes the development of the improved simulation model based on a six terminal Hall... more The paper describes the development of the improved simulation model based on a six terminal Hall element implemented in the hardware description language Verilog-A. The new simulation model considers temperature effects, offset voltage, influence of mechanical stress, external magnetic field and internal magnetic field generated by the internal microcoil. To obtain the best accuracy of the Verilog-A based model, all key parameters of the simulation model were determined and characterized by measuring the manufactured Hall plate bonded into a ceramic package. The verification of the improved simulation model was performed in the Cadence Spectre simulator. The Hall element simulation model was designed in the 0.18µm technology but can be easily adapted to any technology to a certain extent by adjusting its parameters according to the measurement results.
Informacije Midem-journal of Microelectronics Electronic Components and Materials, 2016
To meet strict EMC requirements for power electronics applications driving an inductive load, it ... more To meet strict EMC requirements for power electronics applications driving an inductive load, it is often necessary to mitigate current and voltage transition slopes. Using the conventional MOSFET control method, the slope mitigation is commonly performed by modifying a series gate resistance, which results in high switching losses, long turn-on and turn-off delays and long final gate charging and discharging durations affecting the overall application efficiency. In order to improve this, a novel MOSFET control method is developed and presented in this paper. It enables a complete control over all intervals of the switching sequences utilizing the gate current shaping principle. Switching losses, delays and final gate charging and discharging durations can be kept as low as possible, as the method allows to mitigate only the critical transition. The design of the system allows its implementation in a broad spectrum of applications regardless of the current or voltage rating and with a minimal impact on the application design. The paper presents the detailed description of the proposed system operation and its realization as an integrated circuit. The efficiency measurements of the conventional and the advanced gate control methods are reported as well, showing significant advantages of the proposed system.
An inductive linear displacement measurement microsystem realized as a monolithic Application-Spe... more An inductive linear displacement measurement microsystem realized as a monolithic Application-Specific Integrated Circuit (ASIC) is presented. The system comprises integrated microtransformers as sensing elements, and analog front-end electronics for signal processing and demodulation, both jointly fabricated in a conventional commercially available four-metal 350-nm CMOS process. The key novelty of the presented system is its full integration, straightforward fabrication, and ease of application, requiring no external light or magnetic field source. Such systems therefore have the possibility of substituting certain conventional position encoder types. The microtransformers are excited by an AC signal in MHz range. The displacement information is modulated into the AC signal by a metal grating scale placed over the microsystem, employing a differential measurement principle. Homodyne mixing is used for the demodulation of the scale displacement information, returned by the ASIC as a DC signal in two quadrature channels allowing the determination of linear position of the target scale. The microsystem design, simulations, and characterization are presented. Various system operating conditions such as frequency, phase, target scale material and distance have been experimentally evaluated. The best results have been achieved at 4 MHz, demonstrating a linear resolution of 20 µm with steel and copper scale, having respective sensitivities of 0.71 V/mm and 0.99 V/mm.
A compact THz imaging system was developed for the adenocarcinoma-affected human colon tissues me... more A compact THz imaging system was developed for the adenocarcinoma-affected human colon tissues measurement simultaneously in transmission and reflection geometry. The contrast between the cancer and control tissues fixed in paraffin at 0.6 THz frequency was up to 23%.
Application of Titanium-based Microbolometers in Terahertz Time-Domain Spectrometers
Titanium-based antenna coupled microbolometers (Ti-μbolometers) were applied for a spatial mode c... more Titanium-based antenna coupled microbolometers (Ti-μbolometers) were applied for a spatial mode control of terahertz time-domain spectroscopy (THz-TDS) systems. The response spectra of Ti-μbolometers with three different antenna designs – narrow-band dipole antenna for 0.3 THz, 0.7 THz and a log-periodic antenna for a wide-band detection – were investigated. The spatial profiles of focused and unfocused beams were recorded. It was shown that the Ti-μbolometers can serve as useful instruments in optical alignment and monitoring of spatial mode features in THz-TDS system.
High spatial resolution terahertz imaging of carcinoma tissues at 0.6 THz frequencies
The terahertz (THz) imaging enhanced with compact diffractive lenses and sensitive room temperatu... more The terahertz (THz) imaging enhanced with compact diffractive lenses and sensitive room temperature THz detectors was demonstrated to be suitable for carcinoma zones screening in bio-tissues. Optical transmission of the dehydrated histological sections with a colon cancer was measured with close to wavelength-limited spatial resolution at 0.6 THz frequencies. High number of the explicit areas where THz absorption values varied up to two times was found only in the carcinoma tissues indicating the new potentials of the sub-wavelength THz imaging in the field of medical diagnostic.
This article presents the solution for a fast evaluation tool of an analog integrated Anisotropic... more This article presents the solution for a fast evaluation tool of an analog integrated Anisotropic Magnetoresistance Sensor (AMR) on a silicon wafer. It was necessary to evaluate a selected prototype development phase of a custom analog AMR sensor. This approach significantly shortened the development time as no dicing and packaging was required. We will also use this solution later for a final volume production wafer sorting. The biggest challenge was to quickly generate and release an accurate, sufficiently strong magnetic field that is as parallel as possible to the wafer surface. Such a field is needed to measure the peak values of the sine and cosine output signals of the analog AMR sensor.
Terahertz (THz) imaging and spectroscopy setups require fine optical alignment or precise control... more Terahertz (THz) imaging and spectroscopy setups require fine optical alignment or precise control of spatial mode profile. We demonstrate universal, convenient and easy-to-use imaging-resonant and broadband antenna coupled ultrasensitive titanium-based-dedicated to accurately adjust and control spatial mode profiles without additional focusing optical components of weak power THz sources. Versatile operation of the devices is shown using different kinds of THz-electronic multiplier sources, optical THz mixer-based frequency domain and femtosecond optoelectronic THz time-domain spectrometers as well as optically pumped molecular THz laser. Features of the microbolometers within 0.15-0.6 THz range are exposed and discussed, their ability to detect spatial mode profiles beyond the antennas resonances, up to 2.52 THz, are explored. Polarization-sensitive mode control possibilities are examined in details. The suitability of the resonant antenna-coupled microbolometers to resolve low-absorbing objects at 0.3 THz is revealed via direct, dark field and phase contrast imaging techniques as well.
Synthesis and layout compilation automation of mixed analog-digital ASICs
IEEE International Symposium on Circuits and Systems
Abstract Design automation principles for mixed analog-digital application-specific ICs (ASICs) a... more Abstract Design automation principles for mixed analog-digital application-specific ICs (ASICs) are presented. The proposed method consists of circuit synthesis based on the predefined electrical topologies using library subcells and optimized to the user ...
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Journal of Neurology, Neurosurgery & Psychiatry, 1990
Direct stimulation of muscle fibres with a regular 10 Hz rate, three computer generated random rh... more Direct stimulation of muscle fibres with a regular 10 Hz rate, three computer generated random rhythms and a sequence of voluntary discharges was used to quantify the interdischarge interval (IDI) dependent jitter due to velocity recovery function (VRF). This jitter was found to depend on conduction time and strength of VRF, but not on propagation velocity. The results suggest that in the usual jitter study in voluntarily activated muscle fibre pairs, with moderately irregular discharge rate and interpotential intervals below 3 ms the IDI dependent jitter contributes on average less than 10 ps, but can be so large as to produce false abnormal values at more irregular rates, longer interpotential intervals and pronounced differences in VRF. It can be effectively removed by mathematical algorithms or, better still, by using electrical stimulation.
ABSTRACT A magnetic microsystem has been designed on a chip to demonstrate the improved performan... more ABSTRACT A magnetic microsystem has been designed on a chip to demonstrate the improved performance of an integrated Hall element. The major deficiencies of relatively poor performance of an integrated Hall element has been upgraded through the use of a high efficiency, integrated micro coil, which has been optimized using multiphysics finite element tools. An extensive characterization of the integrated Hall element has allowed the creation of the most complete simulation model, which is usable both in a high level system simulator as well as in a detailed circuit simulation. All results were verified by measuring the fabricated ASIC.
Informacije MIDEM - Journal of Microelectronics, Electronic Components and Materials, 2021
The paper presents simulation and measurement results of high current three-phase inverter power ... more The paper presents simulation and measurement results of high current three-phase inverter power modules used in 48 V motor applications. Firstly, FEM (Finite Element Method) is used to extract circuit parasitics. With the inclusion of MOSFET and parasitic component SPICE models, a highly accurate simulation model is created. Switching characteristics of the power modules are simulated at 300 A load current and 48 V battery voltage. Thermal simulations estimate maximum transistor temperatures at given power losses. Electrical simulations are compared to actual measurements under identical test conditions. The comparison shows good matching between simulations and measurements. The phase voltage rise and fall times are the same in simulations and measurements. The overshoot voltages are also the same in both cases, at around 28 V. The mismatch can be found in the currents of secondary loops. The gate voltage signal is similar with small mismatch of Miller plateau voltage, due to transistor model parameters mismatch.
Informacije Midem-journal of Microelectronics Electronic Components and Materials, Dec 15, 2017
In this paper an operational transconductance amplifier with temperature compensation is presente... more In this paper an operational transconductance amplifier with temperature compensation is presented. It is a voltagecontrolled current source, which operates in an open loop configuration with a single output connected to a resistive load. The amplifier is internally compensated to keep the gain stable over the -40 °C to 125 °C temperature range. It features low input voltage noise and operates at supply voltages from 3 V to 5.5 V. Additionally, an internal 1.21 V bandgap reference is used to ensure a stable internal voltage reference point. The active area of the proposed integrated circuit designed with 0.18 µm Bipolar, CMOS, DMOS (BCD) technology is 750 µm x 260 µm. It consumes 423 µA of current and it has 8.87 nV/SHz of input noise at 500 kHz. The resulting simulated voltage gain is 40 dB and variations are less than ±0.3 dB over the temperature range of -40 °C to 125 °C.
Informacije Midem-journal of Microelectronics Electronic Components and Materials, 2015
The paper discusses an inductive microsensor system for displacement measurement comprising micro... more The paper discusses an inductive microsensor system for displacement measurement comprising microtransformers. The primary windings of the microtransformers are excited with an AC source with a frequency of several MHz. The microtransformers are fabricated in internal metal layers of an integrated circuit using a conventional 350 nm commercial CMOS process, along with corresponding circuits for the processing of the microtransformers' output signals. The major advantage of such system is its costeffectiveness due to its straightforward fabrication and the absence of the need for an external field generator, such as permanent magnets at Hall Effect encoders or a light source at optical encoders. In a linear incremental encoder application, microtransformer output signals are modulated by a metal measurement scale positioned over the integrated microsystem, resulting in a combination of amplitude and phase modulation. The integrated circuit employs a fullydifferential measurement channel with three-stage amplification and a mixer implemented with a Gilbert cell: the signal is demodulated using synchronous demodulation. A prototype microsystem was designed, fabricated and evaluated, demonstrating a sensitivity of 0.99 V/mm with a copper target at an approximate microsystem-target distance of 200-250 µm.
In this paper, we performed a comparative analysis of the electrical impedance and optical method... more In this paper, we performed a comparative analysis of the electrical impedance and optical methods performance for a field soil characterization. The study was optimized by reducing the texture variation and the influence of the unknown soil elements that are not in the focus of this research. The research dataset was created using pure soil from two agriculture farms and fertilized with fertilizers selected by farmers. The impedance spectrometer developed in our laboratory was used to perform the impedance measurements between 30 kHz and 14 MHz showing promising results. Optical measurements were performed within the ultraviolet-visible-near infrared (UV-VIS-NIR) range. The obtained results indicate that it is possible to perform low-cost soil analysis with high accuracy for a field fertilization analysis.
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
The paper deals with the optimization of the integrated planar micro-coil characteristics with re... more The paper deals with the optimization of the integrated planar micro-coil characteristics with respect to maximizing the generated magnetic field amplitude and its uniformity along the region of interest. The integration calls for as efficient realization as possible otherwise the electrical heating would contribute to reduced performance of the integrated system in which the micro-coil is used. A multiobjective optimization is performed with respect to efficiency and uniformity of the magnetic field distribution. It is optimized in a range of the technological rules to be used in application where precise magnetic field measurement is required.
Denervated muscle fibres were stimulated electrically with needle electrodes introduced close to ... more Denervated muscle fibres were stimulated electrically with needle electrodes introduced close to a recording single fibre electrode. The denervated muscle fibre could be driven with rates up to 100 Hz. The jitter was large at threshold but low at suprathreshold stimulus strength. There was evidence of discrete low threshold sites along the denervated muscle fibre, seen as stepwise latency change on smoothly changing stimulus strength, ephaptic activation from other fibres and also as extra-discharges originating from such sites.
The paper describes the development of the improved simulation model based on a six terminal Hall... more The paper describes the development of the improved simulation model based on a six terminal Hall element implemented in the hardware description language Verilog-A. The new simulation model considers temperature effects, offset voltage, influence of mechanical stress, external magnetic field and internal magnetic field generated by the internal microcoil. To obtain the best accuracy of the Verilog-A based model, all key parameters of the simulation model were determined and characterized by measuring the manufactured Hall plate bonded into a ceramic package. The verification of the improved simulation model was performed in the Cadence Spectre simulator. The Hall element simulation model was designed in the 0.18µm technology but can be easily adapted to any technology to a certain extent by adjusting its parameters according to the measurement results.
Informacije Midem-journal of Microelectronics Electronic Components and Materials, 2016
To meet strict EMC requirements for power electronics applications driving an inductive load, it ... more To meet strict EMC requirements for power electronics applications driving an inductive load, it is often necessary to mitigate current and voltage transition slopes. Using the conventional MOSFET control method, the slope mitigation is commonly performed by modifying a series gate resistance, which results in high switching losses, long turn-on and turn-off delays and long final gate charging and discharging durations affecting the overall application efficiency. In order to improve this, a novel MOSFET control method is developed and presented in this paper. It enables a complete control over all intervals of the switching sequences utilizing the gate current shaping principle. Switching losses, delays and final gate charging and discharging durations can be kept as low as possible, as the method allows to mitigate only the critical transition. The design of the system allows its implementation in a broad spectrum of applications regardless of the current or voltage rating and with a minimal impact on the application design. The paper presents the detailed description of the proposed system operation and its realization as an integrated circuit. The efficiency measurements of the conventional and the advanced gate control methods are reported as well, showing significant advantages of the proposed system.
An inductive linear displacement measurement microsystem realized as a monolithic Application-Spe... more An inductive linear displacement measurement microsystem realized as a monolithic Application-Specific Integrated Circuit (ASIC) is presented. The system comprises integrated microtransformers as sensing elements, and analog front-end electronics for signal processing and demodulation, both jointly fabricated in a conventional commercially available four-metal 350-nm CMOS process. The key novelty of the presented system is its full integration, straightforward fabrication, and ease of application, requiring no external light or magnetic field source. Such systems therefore have the possibility of substituting certain conventional position encoder types. The microtransformers are excited by an AC signal in MHz range. The displacement information is modulated into the AC signal by a metal grating scale placed over the microsystem, employing a differential measurement principle. Homodyne mixing is used for the demodulation of the scale displacement information, returned by the ASIC as a DC signal in two quadrature channels allowing the determination of linear position of the target scale. The microsystem design, simulations, and characterization are presented. Various system operating conditions such as frequency, phase, target scale material and distance have been experimentally evaluated. The best results have been achieved at 4 MHz, demonstrating a linear resolution of 20 µm with steel and copper scale, having respective sensitivities of 0.71 V/mm and 0.99 V/mm.
A compact THz imaging system was developed for the adenocarcinoma-affected human colon tissues me... more A compact THz imaging system was developed for the adenocarcinoma-affected human colon tissues measurement simultaneously in transmission and reflection geometry. The contrast between the cancer and control tissues fixed in paraffin at 0.6 THz frequency was up to 23%.
Application of Titanium-based Microbolometers in Terahertz Time-Domain Spectrometers
Titanium-based antenna coupled microbolometers (Ti-μbolometers) were applied for a spatial mode c... more Titanium-based antenna coupled microbolometers (Ti-μbolometers) were applied for a spatial mode control of terahertz time-domain spectroscopy (THz-TDS) systems. The response spectra of Ti-μbolometers with three different antenna designs – narrow-band dipole antenna for 0.3 THz, 0.7 THz and a log-periodic antenna for a wide-band detection – were investigated. The spatial profiles of focused and unfocused beams were recorded. It was shown that the Ti-μbolometers can serve as useful instruments in optical alignment and monitoring of spatial mode features in THz-TDS system.
High spatial resolution terahertz imaging of carcinoma tissues at 0.6 THz frequencies
The terahertz (THz) imaging enhanced with compact diffractive lenses and sensitive room temperatu... more The terahertz (THz) imaging enhanced with compact diffractive lenses and sensitive room temperature THz detectors was demonstrated to be suitable for carcinoma zones screening in bio-tissues. Optical transmission of the dehydrated histological sections with a colon cancer was measured with close to wavelength-limited spatial resolution at 0.6 THz frequencies. High number of the explicit areas where THz absorption values varied up to two times was found only in the carcinoma tissues indicating the new potentials of the sub-wavelength THz imaging in the field of medical diagnostic.
This article presents the solution for a fast evaluation tool of an analog integrated Anisotropic... more This article presents the solution for a fast evaluation tool of an analog integrated Anisotropic Magnetoresistance Sensor (AMR) on a silicon wafer. It was necessary to evaluate a selected prototype development phase of a custom analog AMR sensor. This approach significantly shortened the development time as no dicing and packaging was required. We will also use this solution later for a final volume production wafer sorting. The biggest challenge was to quickly generate and release an accurate, sufficiently strong magnetic field that is as parallel as possible to the wafer surface. Such a field is needed to measure the peak values of the sine and cosine output signals of the analog AMR sensor.
Terahertz (THz) imaging and spectroscopy setups require fine optical alignment or precise control... more Terahertz (THz) imaging and spectroscopy setups require fine optical alignment or precise control of spatial mode profile. We demonstrate universal, convenient and easy-to-use imaging-resonant and broadband antenna coupled ultrasensitive titanium-based-dedicated to accurately adjust and control spatial mode profiles without additional focusing optical components of weak power THz sources. Versatile operation of the devices is shown using different kinds of THz-electronic multiplier sources, optical THz mixer-based frequency domain and femtosecond optoelectronic THz time-domain spectrometers as well as optically pumped molecular THz laser. Features of the microbolometers within 0.15-0.6 THz range are exposed and discussed, their ability to detect spatial mode profiles beyond the antennas resonances, up to 2.52 THz, are explored. Polarization-sensitive mode control possibilities are examined in details. The suitability of the resonant antenna-coupled microbolometers to resolve low-absorbing objects at 0.3 THz is revealed via direct, dark field and phase contrast imaging techniques as well.
Synthesis and layout compilation automation of mixed analog-digital ASICs
IEEE International Symposium on Circuits and Systems
Abstract Design automation principles for mixed analog-digital application-specific ICs (ASICs) a... more Abstract Design automation principles for mixed analog-digital application-specific ICs (ASICs) are presented. The proposed method consists of circuit synthesis based on the predefined electrical topologies using library subcells and optimized to the user ...
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Journal of Neurology, Neurosurgery & Psychiatry, 1990
Direct stimulation of muscle fibres with a regular 10 Hz rate, three computer generated random rh... more Direct stimulation of muscle fibres with a regular 10 Hz rate, three computer generated random rhythms and a sequence of voluntary discharges was used to quantify the interdischarge interval (IDI) dependent jitter due to velocity recovery function (VRF). This jitter was found to depend on conduction time and strength of VRF, but not on propagation velocity. The results suggest that in the usual jitter study in voluntarily activated muscle fibre pairs, with moderately irregular discharge rate and interpotential intervals below 3 ms the IDI dependent jitter contributes on average less than 10 ps, but can be so large as to produce false abnormal values at more irregular rates, longer interpotential intervals and pronounced differences in VRF. It can be effectively removed by mathematical algorithms or, better still, by using electrical stimulation.
ABSTRACT A magnetic microsystem has been designed on a chip to demonstrate the improved performan... more ABSTRACT A magnetic microsystem has been designed on a chip to demonstrate the improved performance of an integrated Hall element. The major deficiencies of relatively poor performance of an integrated Hall element has been upgraded through the use of a high efficiency, integrated micro coil, which has been optimized using multiphysics finite element tools. An extensive characterization of the integrated Hall element has allowed the creation of the most complete simulation model, which is usable both in a high level system simulator as well as in a detailed circuit simulation. All results were verified by measuring the fabricated ASIC.
Informacije MIDEM - Journal of Microelectronics, Electronic Components and Materials, 2021
The paper presents simulation and measurement results of high current three-phase inverter power ... more The paper presents simulation and measurement results of high current three-phase inverter power modules used in 48 V motor applications. Firstly, FEM (Finite Element Method) is used to extract circuit parasitics. With the inclusion of MOSFET and parasitic component SPICE models, a highly accurate simulation model is created. Switching characteristics of the power modules are simulated at 300 A load current and 48 V battery voltage. Thermal simulations estimate maximum transistor temperatures at given power losses. Electrical simulations are compared to actual measurements under identical test conditions. The comparison shows good matching between simulations and measurements. The phase voltage rise and fall times are the same in simulations and measurements. The overshoot voltages are also the same in both cases, at around 28 V. The mismatch can be found in the currents of secondary loops. The gate voltage signal is similar with small mismatch of Miller plateau voltage, due to transistor model parameters mismatch.
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