Chin. J. Semicond. > 2007, Volume 28 > Issue 5 > 796-801

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A Low-Noise,Low-Offset Chopper Amplifier for Micro-Sensor Readout Circuit

Yin Tao, Yang Haigang and Liu Ke

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Abstract: A low-noise,low-offset folded-cascode amplifier for micro-sensor applications is presented.Low 1/f noise and offset are achieved by employing a chopper and dynamic element matching.The input signal bandwidth and output swing are extended with the use of the low impedance node chopping technique and a low-voltage cascode mirror structure.The chip has been realized in 0.35μm 2P4M CMOS technology.The amplifier features an open-loop gain of 839dB and a GBW of 10MHz.The measured typical residual input offset is less than 93.7μV,and the equivalent input low frequency noise is 19.6nV/Hz at a chopping frequency of 100kHz and supply voltage of 3.3V.

Key words: chopper amplifierlow noiselow offsetmicro-sensor

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    Received: 18 August 2015 Revised: 15 December 2006 Online: Published: 01 May 2007

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      Yin Tao, Yang Haigang, Liu Ke. A Low-Noise,Low-Offset Chopper Amplifier for Micro-Sensor Readout Circuit[J]. Journal of Semiconductors, 2007, In Press. Yin T, Yang H G, Liu K. A Low-Noise,Low-Offset Chopper Amplifier for Micro-Sensor Readout Circuit[J]. Chin. J. Semicond., 2007, 28(5): 796.Export: BibTex EndNote
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      Yin Tao, Yang Haigang, Liu Ke. A Low-Noise,Low-Offset Chopper Amplifier for Micro-Sensor Readout Circuit[J]. Journal of Semiconductors, 2007, In Press.

      Yin T, Yang H G, Liu K. A Low-Noise,Low-Offset Chopper Amplifier for Micro-Sensor Readout Circuit[J]. Chin. J. Semicond., 2007, 28(5): 796.
      Export: BibTex EndNote

      A Low-Noise,Low-Offset Chopper Amplifier for Micro-Sensor Readout Circuit

      • Received Date: 2015-08-18
      • Accepted Date: 2006-11-03
      • Revised Date: 2006-12-15
      • Published Date: 2007-04-29

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