A 0.5V Constant-gm Rail-to-Rail OPAMP Using a Bulk-Driven Signal Compressor

摘要：

This paper introduces a rail-to-rail operational amplifier with a single PMOS differential input pair, suitable for operation in ultra-low voltage environments. In order to achieve rail-to-rail input operation, this proposal employs a novel bulkdriven signal compressor which compresses the common mode voltage of input signal to the input range of PMOS input pairs. With a 0.5V supply voltage and 1.51A static current, the simulation results shows the open-loop DC gain is higher than 55dB and a closed-loop unity-gain frequency is about 70KHz. Over the entire common-mode range, the variation of gm is only ±0.45％.

作者: Xiao Zhang Leona Okamura Tsukasa Ooishi Yuzhe Wang Tsutomu Yoshihara

作者单位: Graduate School of Information,Production and Systems, Waseda University Kitakyushu-shi, Fukuoka, 80 Renesas Technology, Itami, Hyogo 664-0005, Japan

会议类型: 国际会议

会议名称: 2009国际通信电路与系统学术会议(ICCCAS 2009)(2009 International Conference on Communications，Circuits and Systems)

会议地点: 成都

会议语种:英文

页码: 657-660

在线出版日期: 2009-07-23（万方平台首次上网日期，不代表论文的发表时间）