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Proceedings of 2009 International Workshop on Information Security and Application (IWISA 2009)

Qingdao, China, November 21-22, 2009

Editors: Feng Gao and Xijun Zhu

AP Catalog Number: AP-PROC-CS-09CN004

ISBN: 978-952-5726-06-0

Page(s): 429-432

Design of 1V Rail to Rail Operation Amplifier Based on a Novel Level Shift Configuration

Lei Cui, Hong-Hui Deng, Guo-Min Zhang, and Yong-Sheng Yin

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In this paper a 1-V Rail-to-Rail operational amplifier is presented. Since the designed circuit adopts two complementary input differential pairs, one of which is connected to inputs through dual-level voltage shift by four source followers, the trans-conductance could be constant overall the common input range. Considering the low supply voltage and enough capability to drive large loads, a feedback class-AB structure is available in the output stage. Under 1V power supply, the whole circuit is simulated with 2pF load-capacitance and 10KΩ load-resistance by HSPICE in the SMIC 0.18um process. The simulation results indicate that the low-frequency voltage gain is 72dB while phase margin is 61.6, the unit frequency bandwidth is 3.1MHz, and the power dissipation only 62uW.

Index Terms

low-voltage, low-power, level voltage shift, operational amplifier

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