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A 0.9V High Precision CMOS Voltage Reference Without Operational Amplifier
Chen Sunwen,Ma Xiaoyu *,Wang Qian
Department of Electronic Engineering, Jinan University, Guangzhou, 510632
*Correspondence author
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Funding: none
Opened online:23 September 2013
Accepted by: none
Citation: Chen Sunwen,Ma Xiaoyu,Wang Qian.A 0.9V High Precision CMOS Voltage Reference Without Operational Amplifier[OL]. [23 September 2013] http://en.paper.edu.cn/en_releasepaper/content/4560366
 
 
A low power high precision CMOS voltage reference without operational amplifier is designed. It is based on sub-threshold MOSFETs and on compensating a proportional to absolute temperature (PTAT) based current, which varies with the emitter-base voltage of a PNP transistor. It has high power supply rejection ratio (PSRR) and a low power consumption, achieving a minimum supply voltage of 0.9 V. The voltage reference circuit was simulated by the tool of HSPICE with TSMC 0.18um technology. The variation of the output reference voltage is 1mV/V for supply voltage from 0.9V to 3V. The temperature coefficient is 18ppm/ C with the supply voltage range from 0.9V to 3V and the temperature range from -10 C to 110 C. The core circuit consumes 15.5uW at room temperature at 1V.
Keywords:Without Operational Amplifier; voltage reference; subthreshold; temperature coefficient
 
 
 

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