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A -100 dB Power Supply Rejection Ratio Non-bandgap Voltage Reference |
HUANG Guocheng①② YIN Tao① ZHU Yuanming①② XU Xiaodong① ZHANG Yachao①② YANG Haigang① |
①(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)
②(University of the Chinese Academy of Sciences, Beijing 100049, China) |
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Abstract This paper presents a non-bandgap voltage reference, which contains a pre-regulated circuit with a super source follower. The pre-regulated circuit includes a super source follower, which attenuates the impedance from the supply of the core reference circuit to ground. In this way, the pre-regulated circuit provides a relative stable voltage for the core reference circuit, improving the Power Supply Rejection Ratio (PSRR) of the output voltage of the reference. The proposed reference circuit is implemented in standard 0.35 μm CMOS process. Measured results show that the supply range is from 1.8 to 5 V and the quiescent current is only about 13 μA at room temperature. The PSRR at low frequency achieves -100 dB and the PSRR below 1 kHz is better than -93 dB. The active area of the proposed reference is only 0.013 mm2.
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Received: 09 November 2015
Published: 09 May 2016
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Fund: The National Natural Science Foundation of China (61474120), The National Key Basic Research Program of China (2014CB744600) |
Corresponding Authors:
YANG Haigang
E-mail: yanghg@mail.ie.ac.cn
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