Acta Scientiarum Naturalium Universitatis Pekinensis

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An Output Buffer Amplifier Used in Detection Circuit of Micro Sensor

Lv Zhijun, NI Xuewen, MO Bangxian, XIANG Bin   

  1. Institute of Microelectronics, Peking University, Beijing, 100871
  • Received:2003-11-04 Online:2004-05-20 Published:2004-05-20


吕志军, 倪学文, 莫邦燹, 项斌   

  1. 北京大学微电子研究院,北京,100871

Abstract: An output buffer amplifier with compact structure used in detection circuit of micro sensor is presented. The op amp contains a constant-gm rail-to-rail input stage and a simple classAB output stage and its output resistor is low. The simulation and measurement show that the output buffer amplifier could well be used in detection circuit.

Key words: Rail-to-Rail, output buffer amplifier, detection circuit

摘要: 设计了一种主要用于微传感器读出电路的输出缓冲放大器。该电路被设计为恒定跨导、Rail-to-Rail的结构,同时还具有输出共模范围大(0~5V)、输出电阻小、电路结构紧凑、非线性失真小等优点。仿真及流片测试证明了以上特点。

关键词: Rail-to-Rail, 输出缓冲放大器, 检测电路

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