The Design and Implement of Low Voltage Output Switched Capacitor Bandgap Reference

• Main Authors: Huang, Chun-Hao, 黃俊浩
• Other Authors: Lu, Chih-Wen
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/uu2r3v

碩士 === 國立清華大學 === 工程與系統科學系 === 105 === In this thesis, a novel architecture of low voltage output switched capacitor bandgap reference is proposed.This study can provide low temperature coefficient and low voltage output which can be lower than VBE. This study uses operational amplifier, BJT and switched capacitor. Operational amplifier can prevents the influence to output voltage from parasitic capacitor and power supply ripple. And it can also cancel input offset voltage by the switching of capacitor. This paper can provide the consideration of the circuit. In the end of this paper, TSMC 0.18μm 1P6M technology is discussed with design flow and measurement results. The measurement result shows that this circuit can be used from 1.6V~1.8V supply voltage. The temperature coefficient is 117.8 ppm/℃ from -30℃~70℃, and the PSRR is -77.7dB with 1kHz sin wave noise. The standard deviation is 1.35mV or 0.319% by the measurement from several chips.