A Chip-Area-Efficient Subthreshold CMOS Voltage Reference with High PSRR Based on Compensated ΔvGS of NMOS Transistors

Lei, Yu; Zhan, Chenchang; Huang, Chenyu; Wang, Lidan

10.1109/APCCAS.2018.8605633

2018

978-1-5386-8241-8

14th IEEE Asia Pacific Conference on Circuits and Systems, APCCAS 2018

497-500

26-30 Oct. 2018

Chengdu, China

Institute of Electrical and Electronics Engineers Inc.

A chip-Area-efficient subthreshold CMOS voltage reference (CVR) with low power consumption and high power supply ripple rejection (PSRR) based on compensated ΔVGS of NMOS transistors is proposed in this paper. The ΔVGS of two different-Vth NMOS transistors is designed to achieve zero temperature coefficient (TC) by compensating its complementary-To-Absolute-Temperature (CTAT) and proportional-To-Absolute-temperature (PTAT) components. An error amplifier driving a current mirror is then used to duplicate the generated zero-TC ΔVGS to a diode-connected NMOS and provide the low-TC VREF. Only two branches are needed in the core part and no resistors are used. Consequently, low power and small area consumptions are achieved with high PSRR. A prototype design is fabricated in a standard 0.18-μm CMOS process. An average TC of 27.26 ppm/°C is measured across 6 dies with a standard derivation of 16.40 ppm/°C over-40 to 80 °C temperature range. The measured line sensitivity is 0.12%/V. The measured PSRR is better than-62.7dB from 10 kHz to 10 MHz. The power consumption is as small as 17.3nW and the chip area is only 0.0244mm².
© 2018 IEEE.

Subthreshold CMOS voltage reference low power consumption high power supply ripple rejection

第一

EI

Shenzhen Science and Technology Innovation Commission[] ; National Natural Science Foundation of China[61604067] ; National Natural Science Foundation of China[] ; [JCYJ20160530191008447]

20191006584156

Diode amplifiers ; Electric power utilization ; Energy efficiency ; Temperature ; Voltage measurement

Energy Conservation:525.2 ; Thermodynamics:641.1 ; Electric Power Systems:706.1 ; Amplifiers:713.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Electric Variables Measurements:942.2

EV Compendex

Department of EEE, Southern University of Science and Technology (SUSTech), Shenzhen, China

Lei, Yu,Zhan, Chenchang,Huang, Chenyu,et al. A Chip-Area-Efficient Subthreshold CMOS Voltage Reference with High PSRR Based on Compensated ΔvGS of NMOS Transistors[C]:Institute of Electrical and Electronics Engineers Inc.,2018:497-500.