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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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International Symposium on Security in Computing and Communications
The overall noise in a sensor read-out circuit is typically dominated by the front-end-amplifier. Achieving low noise often requires high power due to the inherent tradeoff between transconductance $G_{m}$ and bias current $I_{d}$ of the transistor ...
Ke Hu, Jiangchao Wu, Bo Wang, M. Law
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The overall noise in a sensor read-out circuit is typically dominated by the front-end-amplifier. Achieving low noise often requires high power due to the inherent tradeoff between transconductance $G_{m}$ and bias current $I_{d}$ of the transistor ...
Ke Hu, Jiangchao Wu, Bo Wang, M. Law
semanticscholar +1 more source
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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International Symposium on Circuits and Systems, 2021
This paper presents a high-precision and energy-efficiency Capacitively-coupled Chopper Instrumentation amplifier (CCIA) for Wheatstone bridges readout. The Ripple Reduction Loop (RRL) structure is improved to enhance the attenuation effect. In addition,
Hua-Ping Chen, Lei Zhang, Yan Wang
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This paper presents a high-precision and energy-efficiency Capacitively-coupled Chopper Instrumentation amplifier (CCIA) for Wheatstone bridges readout. The Ripple Reduction Loop (RRL) structure is improved to enhance the attenuation effect. In addition,
Hua-Ping Chen, Lei Zhang, Yan Wang
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IEEE Solid-State Circuits Letters, 2023
This letter presents a chopper-stabilized multipath operational amplifier (OPA). By utilizing a 7-bit MOS-DAC-based offset calibration along with a passive ripple reduction filter, the OPA achieves a low input ripple in a power-efficient manner.
Tianxiang Qu +4 more
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This letter presents a chopper-stabilized multipath operational amplifier (OPA). By utilizing a 7-bit MOS-DAC-based offset calibration along with a passive ripple reduction filter, the OPA achieves a low input ripple in a power-efficient manner.
Tianxiang Qu +4 more
semanticscholar +1 more source
Current Noise of Chopper Amplifiers
2018This chapter investigates the root cause of 1/f2 noise of chopper amplifiers through a theoretical analysis and measurements of several chopper IAs. It is well known that the charge injection and clock feedthrough associated with the MOSFETs of the input chopper give rise to significant input current and current noise, which may then be a significant ...
Jiawei Xu +3 more
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Optimization of chopper amplifiers for speed and gain
IEEE Journal of Solid-State Circuits, 1994This paper presents design techniques to optimize the performance of chopper-stabilized ac-coupled CMOS inverter amplifiers. These amplifiers are used as comparators in highspeed flash analog-to-digital converters. For any given process technology, as the required conversion speed and resolution are increased, the amplifiers are required to increase ...
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Design of a Constant-Gm Rail-to-Rail Operational Amplifier with Chopper Stabilization
2025 5th International Conference on Electronics, Circuits and Information Engineering (ECIE)In order to improve the detection accuracy of current singal, a low offset, input/output rail-to-rail operational amplifier is proposed. To ensure that the transconductance of the input stage is constant in the entire common-mode range, the operational ...
Yinuo Hao, Senlin He, Peilei Xiao
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Low power chopper amplifier without LPF
2010 IEEE Asia Pacific Conference on Circuits and Systems, 2010Chopping technique is an efficient approach to decrease the 1/f noise and low-frequency offset of CMOS amplifiers, but conventional chopper amplifier consumes large power because it required a wide-band amplifier exceed a chopping frequency and a post low pass filter (LPF) for eliminating modulation noise.
Xiao Yang +3 more
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IEEE Solid-State Circuits Letters
This letter presents a 45V high-precision current-feedback instrumentation amplifier (CFIA) that combines both chopping and auto-zeroing (AZ) to achieve 1.8- $\mu $ V input offset (10 samples) and 33.5- $\mu $ V input-referred ripple.
Jiahao Wang +4 more
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This letter presents a 45V high-precision current-feedback instrumentation amplifier (CFIA) that combines both chopping and auto-zeroing (AZ) to achieve 1.8- $\mu $ V input offset (10 samples) and 33.5- $\mu $ V input-referred ripple.
Jiahao Wang +4 more
semanticscholar +1 more source