2015•Unpublished venueRequires access

Design of novel chopper stabilized rail-to-rail operational amplifier

Yong Xu, Fei Zhao, Zheng Sun, Yuanliang Wu

Abstract

A chip design of novel chopper stabilized operational amplifier was presented, chopper-wave modulation and demodulation was used in this architecture, and its 1/f noise was decreased largely. To extend input common mode voltage range, a novel rail-to-rail differential amplifier was adapted in the input stage. The range of input common mode voltage was from zero to power supply, and it only consumed about 22μA current. When input signal frequency was 1 KHz, and the output signal THD was only 0.01%.

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Available abstract

Key concepts: Chopper, Input offset voltage, Operational amplifier, Electrical engineering, Amplifier, Direct-coupled amplifier, Total harmonic distortion, Op amp integrator