Title :
A low voltage 8.4 ppm/°C voltage reference based on subthreshold MOSFETs
Author :
Zheng, Lixia ; Wu, Jin ; Zhao, Xia
Author_Institution :
Southeast Univ., Wuxi, China
Abstract :
A CMOS voltage reference based on subthreshold operation is proposed. The current mirror mismatch error resulting from the channel length modulation effect is improved by using a self-cascode operational amplifer. The reference generates a constant reference voltage of 639 mV at supply voltage of 1.2 V with power consumption of 18 uW at room temperature fabricated in CSMC 0.18 um CMOS technology. It achieves a temperature coefficient of 8.4 ppm/°C for the temperature range from -20 °C to 120 °C
Keywords :
CMOS integrated circuits; MOSFET; operational amplifiers; reference circuits; CMOS voltage reference; CSMC CMOS technology; channel length modulation effect; mirror mismatch error; power 18 muW; power consumption; self-cascode operational amplifer; size 0.18 mum; subthreshold MOSFET; temperature -20 degC to 120 degC; temperature 293 K to 298 K; voltage 1.2 V; voltage 639 mV; CMOS integrated circuits; Capacitance; MOSFETs; Mirrors; Operational amplifiers; Threshold voltage; operational amplifier; self-cascode; subthreshold; voltage reference;
Conference_Titel :
Electron Devices and Solid-State Circuits (EDSSC), 2011 International Conference of
Conference_Location :
Tianjin
Print_ISBN :
978-1-4577-1998-1
Electronic_ISBN :
Pending
DOI :
10.1109/EDSSC.2011.6117666
