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Chopper Amplifiers Demystified Transcript
2018AbstractIn CMOS amplifiers, component mismatch can easily give rise to offsets of several millivolts. However, this can be reduced to the microvolt level by the application of chopping. Compared to the alternatives, i.e. increasing device area or trimming, the use of chopping has the added advantage of also suppressing 1/f noise and drift.
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International Semiconductor Conference
The paper presents a dual mux-friendly high voltage chopper offset-stabilized operational amplifier with a symmetrical $RC$ notch filter, having a 4–36 $V$ supply range, and being fabricated in a 0.25 $\mu m$ CMOS process.
C. Stănescu +5 more
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The paper presents a dual mux-friendly high voltage chopper offset-stabilized operational amplifier with a symmetrical $RC$ notch filter, having a 4–36 $V$ supply range, and being fabricated in a 0.25 $\mu m$ CMOS process.
C. Stănescu +5 more
semanticscholar +1 more source
IEEE International Solid-State Circuits Conference
The front-end amplifier typically determines the noise level of a sensor system. Therefore, a highly power-efficient amplifier plays a critical role in Internet-of-Things (IoT) applications with stringent power constraints and small input amplitude [1, 2]
Xinhang Xu +9 more
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The front-end amplifier typically determines the noise level of a sensor system. Therefore, a highly power-efficient amplifier plays a critical role in Internet-of-Things (IoT) applications with stringent power constraints and small input amplitude [1, 2]
Xinhang Xu +9 more
semanticscholar +1 more source
Chopper Amplifiers Demystified Slides
2018AbstractIn CMOS amplifiers, component mismatch can easily give rise to offsets of several millivolts. However, this can be reduced to the microvolt level by the application of chopping. Compared to the alternatives, i.e. increasing device area or trimming, the use of chopping has the added advantage of also suppressing 1/f noise and drift.
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A 50V Chopper Operational Amplifier With 1.3V/×s Common-Mode Transients Tolerance
2024 IEEE European Solid-State Electronics Research Conference (ESSERC)This paper describes a high voltage (HV), slew-rate enhanced chopper-stabilized capacitively-coupled op-amp (CCOPA) for industrial applications. The op-amp utilizes a HVcompatible common-mode feedforward (CMFF) circuit to tolerate significant and rapidly
Shiqi Zhang +4 more
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Auto Correction Feedback for Ripple Suppression in a Chopper Amplifier
IEEE Journal of Solid-State Circuits, 2009This paper proposes a local feedback, named Auto Correction Feedback (ACFB), used in a chopper amplifier to suppress its offset related ripple. It nulls out amplifier's offset in DC domain which would otherwise become modulated ripple at the chopper amplifier's output, instead of filtering the ripple by a post filter.
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2024 4th International Conference on Electronics, Circuits and Information Engineering (ECIE)
This paper presents a CMOS current feedback instrumentation amplifier using in amplifying low-frequency and low-amplitude signal. Realize a well noise performance by chopping and a low offset voltage ripper by ripple-reduction loop.
Meiyu Zhao, Zhen Meng, Xingcheng Zhang
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This paper presents a CMOS current feedback instrumentation amplifier using in amplifying low-frequency and low-amplitude signal. Realize a well noise performance by chopping and a low offset voltage ripper by ripple-reduction loop.
Meiyu Zhao, Zhen Meng, Xingcheng Zhang
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On the Susceptibility of Chopper Operational Amplifiers to EMI
IEEE Transactions on Electromagnetic Compatibility, 2016This paper focuses on the susceptibility to electromagnetic interference (EMI) of chopper operational amplifiers, which are usually preferred to common ones when low-noise and low-offset features are required. The demodulation of EMI carried out by such devices is investigated analyzing the linear distortion that results from the modulation and the ...
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International Symposium on Circuits and Systems
C. Matthus, C. Hoyer, Frank Ellinger
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C. Matthus, C. Hoyer, Frank Ellinger
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