Results 231 to 240 of about 3,714 (283)
31.4 A Chopper-Stabilized Amplifier with -107dB IMD and 28dB Suppression of Chopper-Induced IMD
2021 IEEE International Solid- State Circuits Conference (ISSCC), 2021 Amplifiers often employ chopping to achieve low offset and low-frequency noise. However, the interaction between the input signal and the chopper clock can cause chopper-induced intermodulation distortion (IMD) [1] –[5]. This is especially problematic for input frequencies (Fin) near even multiples of the chopping frequency (FCH), as the resulting IMD ...
Thije Rooijers +4 more
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A low-power chopper bandpass amplifier for biopotential sensors
2016 IEEE International Symposium on Circuits and Systems (ISCAS), 2016 A low-power low-noise chopper operational amplifier for biosensor applications is proposed. It employs a simple ripple suppression method using a band-pass amplifier. The input referred noise is only 43nV/rtHz. Fabricated in a 130nm standard CMOS process, it occupies a chip area of 0.28mm2 and consumes 33sA from a 1.2V supply.
Jiawei Zheng +2 more
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Chopper amplifier circuit with CMOS switches and amplifier FETs
, 1997 Abstract of NL 1001231 (C2) The input voltage is fed to the inputs of an operational amplifier via a chopping reversal switchThe CMOS operational amplifier has a current source and a current mirror. The operational amplifier output is fed to an output circuit.
Huijsing, J.H. (author) +1 more
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Flicker Noise Analysis on Chopper Amplifier
2021 19th IEEE International New Circuits and Systems Conference (NEWCAS), 2021This paper aims to maximize the performance of the chopper amplifier, considering the design trade-off between noise and power consumption. To achieve the goal, we identify and model the various sources of flicker noise in the amplifier and switches using Verilog-AMS language. Then, we build a chopper amplifier circuit and investigate the influences of
Ting Zhou +5 more
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IEEE Transactions on Circuits and Systems II: Express Briefs, 2017 This brief presents the design of a low-noise chopper capacitively coupled instrumentation amplifier (CCIA). To accommodate the input with large electrode offset (EOS), the amplifier includes a coarse digital dc-servo loop (DSL) in addition to a fine ...
Jiawei Zheng +2 more
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Noise Analysis and Simulation of Chopper Amplifier [PDF]
APCCAS 2006 - 2006 IEEE Asia Pacific Conference on Circuits and Systems, 2006 Conventional SPICE-like simulators are not adequate for the noise simulation of the chopper amplifier, which typically has no DC operating point. This paper discusses the noise properties of the chopper amplifier in both time domain and frequency domain and presents a method of simulating chopper amplifier noise behavior with the RF simulator?SpectreRF.
Tao Yin +3 more
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Analysis of a Chopper Amplifier [PDF]
IETE Journal of Research, 1970 Choppers are often required for obtaining low drift performance of low level d.c. amplifiers. The chopper amplifier basically consists of a modulator, an a.c. amplifier, a synchronous demodulator and a low pass filter. The drift-free performance results from the use of the ‘drift-less’ a.c. amplifier for amplification.The a.c.
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A Chopper Instrumentation Amplifier with Amplifier Slicing Technique for Offset Reduction
2020 IEEE International Symposium on Circuits and Systems (ISCAS), 2020This paper presents a chopper instrumentation amplifier design that employs a proposed amplifier slicing technique for offset reduction. In this scheme, the core amplifier is split into multiple identical slices. During operation, the offset polarity of these slices is firstly determined by employing the second-stage of the amplifier as a static ...
Tsz Ngai Lin +3 more
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A sensitive superconducting “chopper” amplifier
Physica, 1957Synopsis A superconducting “chopper” amplifier without movable parts and possessing a direct current sensitivity better than 10−11 volt is described. Compactness of cryostat equipment and convenience of observation were factors controlling design.
A.R. De Vroomen, C. Van Baarle
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