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Circuits, Systems, and Signal Processing
Published in:

09-06-2024

A New Low-Power Non-uniform Sample and Hold Circuit for Biomedical Signal Processing Applications

Authors: Sara Bagher Nasrabadi, Mehdi Dolatshahi, Sayed Mohammadali Zanjani, Hossein Pourghassem

Published in: Circuits, Systems, and Signal Processing | Issue 9/2024

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Abstract

In this paper, a new non-uniform differential sample and hold circuit is proposed using low-distortion sampling switches for biomedical signal processing applications. The proposed design can be used in the biomedical low-frequency range with low-power consumption which makes the proposed design a good candidate for bio-signal sampling purposes. The body biasing technique is employed to reduce the distortion of the sampling switches. Moreover, to reduce the required sampled-data storage capacity, the signal slope rate detection is used to predict the input signal frequency and variations in order to adjust the proper sampling rate of the proposed non-uniform sampling circuit. To realize the proposed design, a capacitive digital-to-analog converter is used to sample the slope changes of signals at two sampling frequencies of 1000 and 100 Hz. The circuit simulation results using 0.18 μm CMOS technology parameters at 1 V supply voltage, indicate the saving in power consumption value up to 57.5% in comparison with other conventional designs. Additionally, the output signal of the proposed circuit can be reconstructed with a percentage root-mean-square difference factor of as low as 2.1%, a mean square error of 0.0025, and a signal-to-noise ratio value of 79.34 dB.
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Metadata
Title
A New Low-Power Non-uniform Sample and Hold Circuit for Biomedical Signal Processing Applications
Authors
Sara Bagher Nasrabadi
Mehdi Dolatshahi
Sayed Mohammadali Zanjani
Hossein Pourghassem
Publication date
09-06-2024
Publisher
Springer US
Published in
Circuits, Systems, and Signal Processing / Issue 9/2024
Print ISSN: 0278-081X
Electronic ISSN: 1531-5878
DOI
https://doi.org/10.1007/s00034-024-02705-2

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