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Design of CMOS operating amplifier for eliminating DC offset based on chopper technology

Suntao Wu

Open publisher page 4 citations

Abstract

To realize the high resolution of sensor system, the inner operating amplifier (op-amp)with low noise and voltage offset is required. A chopper technology which can be employed toreduce the effects of op-amp imperfections is introduced in this paper. A CMOS op-amp circuitbased on the chopper technology is designed for eliminating the input DC offset in the temperaturesensor. At last, we use the result of SPICE simulation to design the values of the op-amp circuitparameters.

About this research paper

What this paper is about

To realize the high resolution of sensor system, the inner operating amplifier (op-amp)with low noise and voltage offset is required. A chopper technology which can be employed toreduce the effects of op-amp imperfections is introduced in this paper. A CMOS op-amp circuitbased on the chopper technology is designed for eliminating the input DC offset in the temperaturesensor. At last, we use the result of SPICE simulation to design the values of the op-amp circuitparameters.

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OpenAlex reports 4 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

To realize the high resolution of sensor system, the inner operating amplifier (op-amp)with low noise and voltage offset is required. A chopper technology which can be employed toreduce the effects of op-amp imperfections is introduced in this paper. A CMOS op-amp circuitbased on the chopper technology is designed for eliminating the input DC offset in the temperaturesensor. At last, we use the result of SPICE simulation to design the values of the op-amp circuitparameters.

Key concepts: Chopper, CMOS, Input offset voltage, Electrical engineering, Offset (computer science), Electronic engineering, Operational amplifier, Amplifier

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