MSc J. Jiang

1. A Compact 10-MHz RC Frequency Reference With a Versatile Temperature Compensation Scheme
   Pan, Sining; An, Xiaomeng; Yu, Zheru; Jiang, Hui; Makinwa, Kofi A. A.;
   IEEE Journal of Solid-State Circuits,
   pp. 1-9, 2023. DOI: 10.1109/JSSC.2023.3322307

2. A Self-Bias-Flip With Charge Recycle Interface Circuit With No External Energy Reservoir for Piezoelectric Energy Harvesting Array
   Li, Z.; Chen, Z.; Wang, J.; Wang, J.; Jiang, J.; Du, S.; Cheng, X.; Zeng, X.; Han, J.;
   IEEE Transactions on Power Electronics,
   Volume 38, Issue 9, pp. 11630-11641, 2023. DOI: 10.1109/TPEL.2023.3286399

3. A Single-Stage Three-Mode Reconfigurable Regulating Rectifier for Wireless Power Transfer
   Liu, S.; Lu, T.; Tang, Z.; Chen, Z.; Jiang, J.; Zhao, B.; Du, S.;
   IEEE Transactions on Power Electronics,
   Volume 38, Issue 7, pp. 9195-9205, 2023. DOI: 10.1109/TPEL.2023.3262728

4. Thermal-Mechanical-Electrical Co-Design of Fan-Out Panel-Level SiC MOSFET Packaging with a Multi-Objective Optimization Algorithm
   Wei Chen; Xuyang Yan; Jiajie Fan; Mesfin S. Ibrahim; Jing Jiang; Xuejun Fan; Guoqi Zhang;
   In Proc. of Electronic Components and Technology Conference (ECTC),
   2023.

5. A 13.56MHz Fully Integrated 91.8% Efficiency Single-Stage Dual-Output Regulating Voltage Doubler for Biomedical Wireless Power Transfer
   Lu, Tianqi; Chang, Zu-Yao; Jiang, Junmin; Makinwa, Kofi; Du, Sijun;
   In 2023 IEEE Custom Integrated Circuits Conference (CICC),
   pp. 1-2, 2023. DOI: 10.1109/CICC57935.2023.10121186

6. A 0.01 mm2 10MHz RC Frequency Reference with a 1-Point On-Chip-Trimmed Inaccuracy of 0.28% from −45°C to 125°C in 0.18μm CMOS
   An, Xiaomeng; Pan, Sining; Jiang, Hui; Makinwa, Kofi A. A.;
   In 2023 IEEE International Solid-State Circuits Conference (ISSCC),
   pp. 60-62, 2023. DOI: 10.1109/ISSCC42615.2023.10067530

7. A 13.56MHz Fully Integrated 91.8% Efficiency Single-Stage Dual-Output Regulating Voltage Doubler for Biomedical Wireless Power Transfer
   Lu, T.; Chang, Z. Y.; Jiang, J.; Makinwa, K.; Du, S.;
   In 2023 IEEE Custom Integrated Circuits Conference (CICC),
   pp. 1-2, 2023. DOI: 10.1109/CICC57935.2023.10121186

8. Co-Reduction of Common Mode Noise and Loop Current of Three-Level Active Neutral Point Clamped Inverters
   Wang, Jianing; Liu, Xiaohui; Peng, Qiang; Xun, Yuanwu; Yu, Shaolin; Jiang, Nan; Wang, Wenbo; Hou, Fengze;
   IEEE Journal of Emerging and Selected Topics in Power Electronics,
   Volume 9, Issue 1, pp. 1088-1103, 2021. DOI: 10.1109/JESTPE.2020.3043018

9. Power-Efficiency Evolution of Capacitive Sensor Interfaces
   Zhichao Tan; Hui Jiang; Huajun Zhang; Xiyuan Tang; Haoming Xin; Stoyan Nihtianov;
   {IEEE} Sensors Journal,
   Volume 21, Issue 11, pp. 12457--12468, June 2021. DOI: 10.1109/jsen.2020.3035109
   document

10. A 0.14mm2 16MHz CMOS RC Frequency Reference with a 1-Point Trimmed Inaccuracy of ±400ppm from -45°C to 85°C
    H. Jiang; S. Pan; Ç. Gürleyük; K. A. A. Makinwa;
    In Dig. Techn. Papers IEEE International Solid-State Circuits Conference (ISSCC),
    February 2021. DOI: 10.1109/ISSCC42613.2021.9365795

11. Human activity classification using radar signal and RNN networks
    H. Jiang; F. Fioranelli; S. Yang; O. Romain; J. Le Kernec;
    In IET International Radar Conference (IET IRC 2020),
    pp. 1595-1599(4), January 2021. DOI: 10.1049/icp.2021.0556

12. A 0.14mm2 16MHz CMOS RC Frequency Reference with a 1-Point Trimmed Inaccuracy of ±400ppm from -45°C to 85°C
    H. Jiang; S. Pan; Ç. Gürleyük; K. A. A. Makinwa;
    In Dig. Techn. Papers IEEE International Solid-State Circuits Conference (ISSCC),
    pp. 436-438, February 2021. DOI: 10.1109/ISSCC42613.2021.9365795

13. A 117-dB In-Band CMRR 98.5-dB SNR Capacitance-to-Digital Converter for Sub-nm Displacement Sensing With an Electrically Floating Target
    Hui Jiang; Samira Amani; Johan G. Vogel; Saleh Heidary Shalmany; Stoyan Nihtianov;
    IEEE Solid-State Circuits Letters,
    Volume 3, pp. 9--12, 2020. DOI: 10.1109/lssc.2019.2952851

14. The Impact of Gate Recess on the H2 Detection Properties of Pt-AlGaN/GaN HEMT Sensors
    Robert Sokolovskij; Jian Zhang; Hongze Zheng; Wenmao Li; Yang Jiang; Gaiying Yang; Hongyu Yu; Pasqualina M. Sarro; Guoqi Zhang;
    IEEE Sensors,
    Volume 20, Issue 16, pp. 8947-8955, 2020.
    document

15. P-type β-Ga2O3 metal-semiconductor-metal solar-blind photodetectors with extremely high responsivity and gain-bandwidth product
    Z.X. Jiang; Z.Y. Wu; C.C. Ma; J.N. Deng; H. Zhang; Y. Xu; J.D. Ye; Z.L. Fang; GuoQi Zhang; J.Y. Kang; T.-Y. Zhang;
    Materials Today Physics,
    Volume 14, pp. 100226, 2020. DOI: 10.1016/j.mtphys.2020.100226
    document

16. Research On FOPLP Package of multi-chip Power Module
    Jing Jiang; Jia ren Huo; Guan qiang Song; Huaiyu Ye; De Bo Liu; GuoQi Zhang; Jun Tao Jun Wang;
    In 2020 IEEE 8th Electronics System-Integration Technology Conference (ESTC),
    pp. 1-6, Sep. 2020. DOI: 10.1109/ESTC48849.2020.9229816

17. Short-Range Quality-Factor Modulation (SQuirM) for Low Power High Speed Inductive Data Transfer
    M. Schormans; D. Jiang; V. Valente; A. Demosthenous;
    IEEE Transactions on Circuits and Systems I: Regular Papers,
    Volume 66, Issue 9, pp. 3254-3265, Sept. 2019. DOI: 10.1109/TCSI.2019.2922124
    document

18. An Energy-Efficient 3.7nV/√Hz Bridge-Readout IC with a Stable Bridge Offset Compensation Scheme
    H. Jiang; S. Nihtianov; K.A.A. Makinwa;
    IEEE Journal of Solid-State Circuits,
    Volume 53, pp. 856-864, 3 2019. DOI: 10.1109/JSSC.2018.2885556
    
    Abstract: ...

    This paper describes an energy-efficient bridge readout IC (ROIC), which consists of a capacitively coupled instrumentation amplifier (CCIA) that drives a continuous-time delta-sigma modulator (CTΔΣM). By exploiting the CCIA's ability to block dc common-mode voltages, the bridge's bias voltage may exceed the ROIC's supply voltage, allowing these voltages to be independently optimized. Since bridge output is typically much smaller than bridge offset, a digital to analog converter (DAC) is used to compensate this offset before amplification and thus increase the CCIA's useful dynamic range. Bridge loading is reduced by using a dual-path positive feedback scheme to boost the CCIA's input impedance. Furthermore, the CCIA's output is gated to avoid digitizing its output spikes, which would otherwise limit the ROIC's linearity and stability. The ROIC achieves an input-referred noise density of 3.7 nV/√Hz, a noise efficiency factor (NEF) of 5, and a power efficiency factor (PEF) of 44, which both represent the state of the art. A pressure sensing system, built with the ROIC and a differential pressure sensor (AC4010), achieves 10.1-mPa (1ιι) resolution in a 0.5-ms conversion time. The ROIC dissipates about 30% of the system's power dissipation and contributes about 6% of its noise power. To reduce the sensor's offset drift, a temperature compensation scheme based on an external reference resistor is used. After a two-point calibration, this scheme reduces bridge offset drift by 80× over a 50 °C range.

19. A 15nW per Button Interference-Immune Readout IC for Capacitive Touch Sensors
    S. Hussaini; H. Jiang; P. Walsh; D. MacSweeney; K.A.A. Makinwa;
    IEEE Journal of Solid-State Circuits,
    Volume 54, pp. 1874-1882, 7 2019. DOI: 10.1109/JSSC.2019.2907041
    
    Abstract: ...

    This paper presents a readout IC that uses an asynchronous capacitance-to-digital-converter (CDC) to digitize the capacitance of a touch sensor. A power-efficient tracking algorithm ensures that the CDC consumes negligible power consumption in the absence of touch events. To facilitate its use in wake-on-touch applications, the CDC can be periodically triggered by a co-integrated ultra-low-power relaxation oscillator. At a 38-Hz scan rate, the readout IC consumes 15 nW per touch sensor, which is the lowest reported to date.

20. High-resolution MEMS inertial sensor combining large-displacement buckling behaviour with integrated capacitive readout
    Brahim El Mansouri; Luke M. Middelburg; Rene H. Poelma; GuoQi Zhang; Henk W. van Zeijl; Jia Wei; Hui Jiang; Johan G. Vogel; Willem D. van Driel;
    Microsystems & Nanoengineering,
    Volume 5, 2019.
    document

21. Impact of high temperature H2 pre-treatment on Pt-AlGaN/GaN HEMT sensor for H2S detection
    Jian Zhang; Robert Sokolovskij; Ganhui Chen; Yumeng Zhu; Yongle Qi; Xinpeng Lin; Wenmao Li; GuoQi Zhang; Yu-Long Jiang; Hongyu Yu;
    Sensors and Actuators, B: Chemical,
    Volume 280, pp. 138-143, 2019. DOI: 10.1016/j.snb.2018.10.052

22. A 15nW per Button Interference-Immune Readout IC for Capacitive Touch Sensors
    S. Hussaini; H. Jiang; P. Walsh; D. MacSweeney; K.A.A. Makinwa;
    IEEE Journal of Solid-State Circuits,
    Volume 54, Issue 7, pp. 1874-1882, 7 2019. DOI: 10.1109/JSSC.2019.2907041
    
    Abstract: ...

    This paper presents a readout IC that uses an asynchronous capacitance-to-digital-converter (CDC) to digitize the capacitance of a touch sensor. A power-efficient tracking algorithm ensures that the CDC consumes negligible power consumption in the absence of touch events. To facilitate its use in wake-on-touch applications, the CDC can be periodically triggered by a co-integrated ultra-low-power relaxation oscillator. At a 38-Hz scan rate, the readout IC consumes 15 nW per touch sensor, which is the lowest reported to date.

23. An Energy-Efficient 3.7nV/√Hz Bridge-Readout IC with a Stable Bridge Offset Compensation Scheme
    H. Jiang; S. Nihtianov; K.A.A. Makinwa;
    IEEE Journal of Solid-State Circuits,
    Volume 53, Issue 3, pp. 856-864, 3 2019. DOI: 10.1109/JSSC.2018.2885556
    
    Abstract: ...

    This paper describes an energy-efficient bridge readout IC (ROIC), which consists of a capacitively coupled instrumentation amplifier (CCIA) that drives a continuous-time delta-sigma modulator (CTΔΣM). By exploiting the CCIA's ability to block dc common-mode voltages, the bridge's bias voltage may exceed the ROIC's supply voltage, allowing these voltages to be independently optimized. Since bridge output is typically much smaller than bridge offset, a digital to analog converter (DAC) is used to compensate this offset before amplification and thus increase the CCIA's useful dynamic range. Bridge loading is reduced by using a dual-path positive feedback scheme to boost the CCIA's input impedance. Furthermore, the CCIA's output is gated to avoid digitizing its output spikes, which would otherwise limit the ROIC's linearity and stability. The ROIC achieves an input-referred noise density of 3.7 nV/√Hz, a noise efficiency factor (NEF) of 5, and a power efficiency factor (PEF) of 44, which both represent the state of the art. A pressure sensing system, built with the ROIC and a differential pressure sensor (AC4010), achieves 10.1-mPa (1ιι) resolution in a 0.5-ms conversion time. The ROIC dissipates about 30% of the system's power dissipation and contributes about 6% of its noise power. To reduce the sensor's offset drift, a temperature compensation scheme based on an external reference resistor is used. After a two-point calibration, this scheme reduces bridge offset drift by 80× over a 50 °C range.

24. Short-Range Quality-Factor Modulation (SQuirM) for Low Power High Speed Inductive Data Transfer
    M. Schormans; D. Jiang; V. Valente; A. Demosthenous;;
    In Book of Abstracts, 2019 International Symposium on Integrated Circuits and Systems (ISICAS 2019),
    Venice, Italy, IEEE, 29-30 August 2019. DOI: 10.1109/TCSI.2019.2922124
    document

25. An Energy-Efficient BJT-Based Temperaure-to-Digital Converter with ±0.13 °C (3σ) Inaccuracy from -40 to 125°C
    R.K. Kumar; H. Jiang; K. A.A. Makinwa;
    In Proc. IEEE Asian Solid-State Circuits Conference (ASSCC),
    11 2019.

26. An Energy-Efficient BJT-Based Temperature-to-Digital Converter with ±0.13°C (3σ) Inaccuracy from -40 to 125°C
    Kumar, Rushil K.; Jiang, Hui; Makinwa, Kofi A. A.;
    In 2019 IEEE Asian Solid-State Circuits Conference (A-SSCC),
    pp. 107-108, 2019. DOI: 10.1109/A-SSCC47793.2019.9056962

27. Nano-Power Capacitance-to-Digital Converter
    S. Hussaini; H. Jiang; D. MacSweeney; K.A.A. Makinwa;
    Patent, 20190072597, 2019.

28. A 4.5 nV/\sqrtHz Capacitively-Coupled Continuous-Time Sigma-Delta Modulator with an Energy-Efficient Chopping Scheme
    H. Jiang; C. Ligouras; S. Nihtianov; K.A.A. Makinwa;
    IEEE Solid-State Circuits Letters,
    Volume 1, pp. 18-21, 2018. DOI: 10.1109/LSSC.2018.2803447
    
    Abstract: ...

    When chopping is applied to a continuous-time sigmadelta modulator (CTΣΔM), quantization noise fold-back often occurs, leading to increased in-band noise. This can be prevented by employing a return-to-zero (RZ) digital-to-analog converter (RZ DAC) in the modulator's feedback path and arranging the chopping transitions to coincide with its RZ phases. In this letter, this technique has been extended and implemented in an energy-efficient CTΣΔM intended for the readout of Wheatstone bridge sensors. To achieve a wide common-mode input range, the modulator's summing node is implemented as an embedded capacitively coupled instrumentation amplifier which can be readily combined with a highly linear 1-bit capacitive RZ DAC. Measurements show that the proposed chopping scheme does not suffer from quantization noise fold-back and also allows a flexible choice of chopping frequency. When chopped at one-tenth of the sampling frequency, the modulator achieves 15 ppm INL, 4.5 nV/√Hz input-referred noise and a state-of-the-art noise efficiency factor of 6.1.

29. MEMS for biofuel composition measurement based on thermal impedance spectroscopy
    Ghaderi, Mohammadamir; Jiang, Bo; Bossche, Andre; Visser, Jaco H; Wolffenbuttel, Reinoud F;
    Sensors and Actuators B: Chemical,
    Volume 277, pp. 281--288, December 2018. DOI: 10.1016/j.snb.2018.08.098
    
    Abstract: ...

    Continuous monitoring of the composition of E85 biofuel is essential for a quick start and clean and efficient operation of Flex-Fuel Vehicles. The actual ethanol concentration in E85 fuel is in the range 50%–85% and fuel-line sensors are used for ethanol-gasoline composition measurement. However, also a small amount of water is typically present, which cannot be reliably detected using state-of-the-art capacitive fuel-line sensors. Thermal impedance spectroscopy has been investigated as a non-destructive technique to determine the composition of ternary mixtures of biofuels. The principle of the thermal conductivity detector has been extended for measuring both the thermal conductivity and the thermal capacity of biofuel in the range up to 10 kHz using an AC-operated polysilicon heater for injecting a sinusoidal heat flux, and another polysilicon strip at a well-defined spacing or thermopile sensors for measuring the in-phase and quadrature components of the resulting AC temperature difference. Measurements on the components are in reasonable agreement with simulations, with a −3 dB cut-off frequency at 422.5 Hz and 340.8 Hz for ethanol and gasoline, respectively. However, the cut-off frequency of water was found to be significantly lower than simulations due to its high surface tension, thus limiting access to the detector.

30. Effects of Voids on Mechanical and Thermal Properties of the Die Attach Solder Layer Used in High-Power LED Chip-Scale Packages
    Chengshuo Jiang; Jiajie Fan; Cheng Qian; Hao Zhang; Xuejun Fan; Weiling Guo; GuoQi Zhang;
    IEEE Transactions on Components, Packaging and Manufacturing Technology,
    Volume 8, Issue 7, pp. 1254-1262, 2018.

31. A 4.5 nV/\sqrtHz Capacitively-Coupled Continuous-Time Sigma-Delta Modulator with an Energy-Efficient Chopping Scheme
    H. Jiang; C. Ligouras; S. Nihtianov; K.A.A. Makinwa;
    IEEE Solid-State Circuits Letters,
    Volume 1, Issue 1, pp. 18-21, 2018. DOI: 10.1109/LSSC.2018.2803447
    
    Abstract: ...

    When chopping is applied to a continuous-time sigmadelta modulator (CTΣΔM), quantization noise fold-back often occurs, leading to increased in-band noise. This can be prevented by employing a return-to-zero (RZ) digital-to-analog converter (RZ DAC) in the modulator's feedback path and arranging the chopping transitions to coincide with its RZ phases. In this letter, this technique has been extended and implemented in an energy-efficient CTΣΔM intended for the readout of Wheatstone bridge sensors. To achieve a wide common-mode input range, the modulator's summing node is implemented as an embedded capacitively coupled instrumentation amplifier which can be readily combined with a highly linear 1-bit capacitive RZ DAC. Measurements show that the proposed chopping scheme does not suffer from quantization noise fold-back and also allows a flexible choice of chopping frequency. When chopped at one-tenth of the sampling frequency, the modulator achieves 15 ppm INL, 4.5 nV/√Hz input-referred noise and a state-of-the-art noise efficiency factor of 6.1.

32. Energy-efficient bridge-to-digital converters
    H. Jiang; K.A.A. Makinwa;
    In Proc. IEEE Custom Integrated Circuits Conference (CICC),
    pp. 1-7, 4 2018. DOI: 10.1109/CICC.2018.8357027

33. A 15nW Per Button Noise-Immune Readout IC for Capacitive Touch Sensor
    S. Hussaini; H. Jiang; P. Walsh; D. MacSweeney; K.A.A. Makinwa;
    In Proc. European Solid-State Circuits Conference (ESSCIRC),
    2018. DOI: 10.1109/ESSCIRC.2018.8494283

34. A 117DB in-Band CMRR 98.5DB SNR Capacitance-to-Digital Converter for Sub-NM Displacement Sensing with an Electrically Floating Target
    H. Jiang; S. Amani; J. G. Vogel; S. H. Shalmany; S. Nihtianov;
    In 2018 IEEE Symposium on VLSI Circuits,
    pp. 159-160, June 2018. DOI: 10.1109/VLSIC.2018.8502363
    
    Keywords: ...

    analogue-digital conversion;CMOS integrated circuits;displacement measurement;nanosensors;high-performance capacitance-to-digital converter;in-band common-mode rejection ratio;decent electric field interference immunity;displacement sensor probe;CDC;electrically floating target;sub-nm displacement sensing;power 560.0 muW;time 1.0 ms;frequency 1.0 kHz;Sensors;Electrodes;Interference;Energy efficiency;Electric fields;Capacitors;Signal to noise ratio.

35. Au-based and Au-free Ohmic Contacts to AlGaN/GaN Structures on Silicon or Sapphire Substrates
    Wenmao Li; Jian Zhang; Robert Sokolovskij; Yumeng Zhu; Yongle Qi; Xinpeng Lin; Jingyi Wu; Lingli Jiang; Hongyu Yu;
    In 18th International Workshop on Junction Technology,
    2018.

36. A 15nW Per Button Noise-Immune Readout IC for Capacitive Touch Sensor
    S. Hussaini; H. Jiang; P. Walsh; D. MacSweeney; K.A.A. Makinwa;
    In Proc. European Solid-State Circuits Conference (ESSCIRC),
    pp. 190-193, 2018. DOI: 10.1109/ESSCIRC.2018.8494283

37. Energy-efficient bridge-to-digital converters
    H. Jiang; K.A.A. Makinwa;
    In Proc. IEEE Custom Integrated Circuits Conference (CICC),
    pp. 1-7, 4 2018. DOI: 10.1109/CICC.2018.8357027

38. A Hybrid Multi-Path CMOS Magnetic Sensor with 76 ppm/˚C Sensitivity Drift and Discrete-Time Ripple Reduction Loops
    J. Jiang; K.A.A. Makinwa;
    IEEE Journal of Solid-State Circuits,
    Volume 52, pp. 1876 - 1884, 7 2017. DOI: 10.1109/jssc.2017.2685462

39. Multipath Wide-Bandwidth CMOS Magnetic Sensors
    J. Jiang; K.A.A. Makinwa;
    IEEE Journal of Solid-State Circuits,
    Volume 52, pp. 198-209, 1 2017. DOI: 10.1109/jssc.2016.2619711

40. A Power-Efficient Readout for Wheatstone-Bridge Sensors With COTS Components
    H. Jiang; J. G. Vogel; S. Nihtianov;
    IEEE Sensors Journal,
    Volume 17, Issue 21, pp. 6986-6994, Nov 2017. DOI: 10.1109/JSEN.2017.2755074
    
    Keywords: ...

    bridge circuits;convertors;differential amplifiers;microsensors;operational amplifiers;piezoresistive devices;pressure measurement;pressure sensors;readout electronics;sigma-delta modulation;COTS component;CTΔΣM;MEMS piezoresistive differential pressure sensor;Wheatstone-bridge sensor;direct digital converter;off-the-shelf component;operational amplifier;power 7.58 mW;power 9.55 mW;power-efficient readout;pressure 12.7 mPa;resistance 0.41 mohm;second-order continuous-time sigma-delta modulator;time 0.5 ms;voltage 5 V;Bridge circuits;Clocks;Energy efficiency;Modulation;Radio frequency;Sensors;Topology;Direct digital converter;bridge sensor readout;continuous-time sigma-delta modulator;mPa-level differential pressure sensing.
    
    
    Abstract: ...

    This paper presents a direct digital converter for Wheatstone bridge sensors, which is realized with commercial off-the-shelf components. The power efficiency of the readout is enhanced by embedding the bridge sensor in a second-order continuous-time sigma-delta modulator (CTDeltaSigmaM). By directly digitizing the output signal of a Wheatstone bridge in the current mode, the noise performance is dominated by the operational amplifier in the first integrator and the bridge sensor. To demonstrate the performance of the proposed circuit, an MEMS piezoresistive differential pressure sensor is used. Measurement results show that a resolution of 12.7 mParms (0.41 mOhmrms), with a 0.5-ms conversion time, can be achieved. Powered by 5 V, the circuit and the bridge sensor draw 9.55 and 7.58 mW, respectively.

41. A Hybrid Multi-Path CMOS Magnetic Sensor with 76 ppm/˚C Sensitivity Drift and Discrete-Time Ripple Reduction Loops
    J. Jiang; K.A.A. Makinwa;
    IEEE Journal of Solid-State Circuits,
    Volume 52, Issue 7, pp. 1876 - 1884, 7 2017. DOI: 10.1109/jssc.2017.2685462

42. Multipath Wide-Bandwidth CMOS Magnetic Sensors
    J. Jiang; K.A.A. Makinwa;
    IEEE Journal of Solid-State Circuits,
    Volume 52, Issue 1, pp. 198-209, 1 2017. DOI: 10.1109/jssc.2016.2619711

43. An Energy-Efficient Readout Method for Piezoresistive Differential Pressure Sensors
    H. Jiang; K.A.A. Makinwa; S. Nihitanov;
    In Annual Conference of the IEEE Industrial Electronics Society (IES) 2017: 43rd,
    2017.

44. Microstructure for Thermal Impedance Spectroscopy for Biofuel Composition Measurement
    B. Jiang; M. Ghaderi; A. Bossche; J.H. Visser; R.F. Wolffenbuttel;
    In Multidisciplinary Digital Publishing Institute Proceedings,
    pp. 396, 2017. DOI: 10.3390/proceedings1040396
    
    Abstract: ...

    Thermal impedance spectroscopy has been investigated as a non-destructive technique to determine the composition of ternary mixtures of biofuels. The principle of the thermal conductivity detector has been extended for measuring both the thermal conductivity and the thermal capacity of biofuel in the range between 1 to 100 Hz, using an AC-operated polysilicon heater for injecting a sinusoidal heat flux, and another polysilicon strip at a well-defined spacing or thermopile sensors for measuring the in-phase and quadrature components of the resulting AC temperature difference.

45. A CMOS Temperature Sensor with a 49fJ·K2 Resolution FoM
    S. Pan; H. Jiang; K.A.A. Makinwa;
    In Dig. Techn. Paper IEEE Symposium on VLSI Circuits (VLSI),
    6 2017. DOI: 10.23919/vlsic.2017.8008557

46. An energy-efficient 3.7nV/ sqrtHz bridge-readout IC with a stable bridge offset compensation scheme
    H. Jiang; K. A. A. Makinwa; S. Nihtianov;
    In Proc. IEEE International Solid-State Circuits Conference (ISSCC),
    pp. 172-173, Feb 2017. DOI: 10.1109/ISSCC.2017.7870316

47. An Energy-Efficient Readout Method for Piezoresistive Differential Pressure Sensors
    H. Jiang; Kofi A. A. Makinwa; S. Nihtianov;
    In Proc. IEEE Industrial Electronics Conference (IECON), Beijing,
    Nov. 2017.

48. Chopping in Continuous-Time Sigma-Delta Modulators
    H. Jiang; B. Gonen; K.A.A. Makinwa; S. Nihtianov;
    In IEEE International Symposium on Circuits and Systems (ISCAS),
    June 2017. DOI: 10.1109/iscas.2017.8050951

49. Optimization of reflow soldering process for white LED chip-scale-packages on substrate
    C Jiang; W Guo; J Fan; C Qian; X Fan; GuoQi Zhang;
    In Electronic Packaging Technology (ICEPT), 2017 18th International Conference on,
    2017.

50. Electrical and optical properties of NO and H2S adsorption on Arsenic Phosphorus
    Y Zhang; K Zheng; X Chen; GuoQi Zhang; C Tan; Q Yang; J Jiang; H Ye;
    In Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE), 2017 18th International Conference on,
    2017.

51. First principle design of CdS/germanene heterostructures with tunable electronic and transport properties
    K Zheng; H Ye; GuoQi Zhang; Y Zhang; L Liu; J Jiang; Q Yang; C Tan; X Chen;
    In Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE), 2017 18th International Conference on,
    2017.

52. An energy-efficient readout method for piezoresistive differential pressure sensors
    Jiang, Hui; Makinwa, Kofi A. A.; Nihitanov, Stoyan;
    In IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society,
    pp. 4287-4291, 2017. DOI: 10.1109/IECON.2017.8216736

53. A CMOS Temperature Sensor with a 49fJ·K2 Resolution FoM
    S. Pan; H. Jiang; K.A.A. Makinwa;
    In Dig. Techn. Paper IEEE Symposium on VLSI Circuits (VLSI),
    pp. C82-C83, 6 2017. DOI: 10.23919/vlsic.2017.8008557

54. Chopping in Continuous-Time Sigma-Delta Modulators
    H. Jiang; B. Gonen; K.A.A. Makinwa; S. Nihtianov;
    In IEEE International Symposium on Circuits and Systems (ISCAS),
    pp. 1-4, June 2017. DOI: 10.1109/iscas.2017.8050951

55. An energy-efficient 3.7nV/ sqrtHz bridge-readout IC with a stable bridge offset compensation scheme
    H. Jiang; K. A. A. Makinwa; S. Nihtianov;
    In Proc. IEEE International Solid-State Circuits Conference (ISSCC),
    pp. 172-173, Feb 2017. DOI: 10.1109/ISSCC.2017.7870316

56. A 30-ppm <80 nJ Ring-Down-Based Readout Circuit for Resonant Sensors
    H. Jiang; Z. Y. Chang; M. A. P. Pertijs;
    IEEE Journal of Solid-State Circuits,
    Volume 51, Issue 1, pp. 187‒195, January 2016. DOI: 10.1109/JSSC.2015.2470552
    
    Abstract: ...

    This paper presents an energy-efficient readout circuit for micro-machined resonant sensors. It operates by briefly exciting the sensor at a frequency close to its resonance frequency, after which resonance frequency and quality factor are determined from a single ring-down transient. The circuit employs an inverter-based trans-impedance amplifier to sense the ring-down current, with a programmable feedback network to enable the readout of different resonant sensors. An inverter-based comparator with dynamically-adjusted threshold levels tracks the ring-down envelope to measure quality factor, and detects zero crossings to measure resonance frequency. The excitation frequency is dynamically adjusted to accommodate large resonance frequency shifts. Experimental results obtained with a prototype fabricated in 0.35 μm standard CMOS technology and three different SiN resonators are in good agreement with conventional impedance analysis. The prototype achieves a frequency resolution better than 30 ppm while consuming less than 80 nJ/meas from a 1.8 V supply, which is 7.8x less than the state-of-the-art.

57. An Implantable Stimulator With Safety Sensors in Standard CMOS Process for Active Books
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