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Wide-range single-ended CMOS track-and-hold circuit

Hamid Movahedian, Behnam Sedighi, Mehrdad Sharif Bakhtiar

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Hamid Movahedian
Electrical Engineering Department, Sharif University of Technology
Behnam Sedighi
Electrical Engineering Department, Sharif University of Technology
Mehrdad Sharif Bakhtiar
Electrical Engineering Department, Sharif University of Technology

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Keywords:track and hold,static error,total harmonic distortion

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2007 Volume 4Issue 12Pages 400-405

DOIhttps://doi.org/10.1587/elex.4.400

Details

Published: 2007Received: April 15, 2007Available on J-STAGE: June 25, 2007Accepted: May 24, 2007Advance online publication: -Revised: -

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Article overview

Abstract

This paper investigates the performance of a MOS track-and-hold circuit as the front end of a wide input range and high-speed single-sided ADC. In order to reduce charge injection and clock feedthrough errors, a new technique for employing a dummy transistor in the bootstrapped switch of the track and hold circuit is introduced. Performance of the proposed circuit for the two cases of constant and non-linear hold capacitor is studied. It is also shown that how and when dummy switch and bulk switching method can improve the accuracy of the T/H.

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