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IEEE Transactions on Circuits and Systems - II - Express Briefs, 2021
Achieving a high input impedance ${Z} _{\mathrm{ in}}$ is important for the instrumentation amplifier (IA) performing neural and biopotential signal sensing.
Xuan Thanh Pham +4 more
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Achieving a high input impedance ${Z} _{\mathrm{ in}}$ is important for the instrumentation amplifier (IA) performing neural and biopotential signal sensing.
Xuan Thanh Pham +4 more
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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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A 46.6 μg/√Hz Single-Chip Accelerometer Exploiting a DTC-Assisted Chopper Amplifier
IEEE Journal of Solid-State CircuitsThis article presents a single-chip accelerometer with the best reported thermal noise and the lowest bias instability among state-of-the-art accelerometers with high- $g$ ( $>$ 1000 $g$ ) sensing capability.
Xiaoliang Li +5 more
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IEEE Transactions on Biomedical Circuits and Systems
A CMOS analog front-end (AFE) local-field potential (LFP) chopper amplifier with stimulation artifact tolerance, improved right-leg driven (RLD) circuit, and improved auxiliary path is proposed. In the proposed CMOS AFE LFP chopper amplifier, common-mode
Chung-Yu Wu +5 more
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A CMOS analog front-end (AFE) local-field potential (LFP) chopper amplifier with stimulation artifact tolerance, improved right-leg driven (RLD) circuit, and improved auxiliary path is proposed. In the proposed CMOS AFE LFP chopper amplifier, common-mode
Chung-Yu Wu +5 more
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A chopper dc instrumental amplifier
Measurement Techniques, 1987Because of their low zero drift chopper, dc amplifiers [I, pp. 22-23] are widely used in measuring equipment. The ratio of the maximum cut-off frequency of such an amplifier to its modulation frequency must be carefully chosen since an increase of its carrier frequency magnifies the effect of high-frequency pulse noise on the output voltage [2] in ...
A. E. Gudilin, S. V. Zhmak
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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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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
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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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31.4 A Chopper-Stabilized Amplifier with -107dB IMD and 28dB Suppression of Chopper-Induced IMD
2021 IEEE International Solid- State Circuits Conference (ISSCC), 2021Amplifiers 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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