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Wide-range single-ended CMOS track-and-hold circuit
, Article IEICE Electronics Express ; Volume 4, Issue 12 , 2007 , Pages 400-405 ; 13492543 (ISSN) ; Sedighi, B ; Sharif Bakhtiar, M ; Sharif University of Technology
2007
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 theT/H. © IEICE 2007