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Switched Capacitor Sample-and-Hold Circuit with Input Signal Range beyond Supply Voltage

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3 Author(s)
Centurelli, F. ; Dept. of Electron. Eng., Univ. of Rome "La Sapienza", Rome, Italy ; Simonetti, A. ; Trifiletti, A.

A switched capacitor sample-and-hold (S/H) circuit with extended dynamic range beyond the supply voltage is presented. The proposed architecture includes a gate-bootstrapped circuit and an improved flip-around S/H with two selectable configurations. Simulations in a 0.13 ¿m CMOS technology show that the new system is capable of sampling a below-ground signal and allows an interface adapter that enhances the dynamic range of the low-voltage analog-to-digital (A/D) converters without affecting the input bandwidth.

Published in:

NORCHIP, 2008.

Date of Conference:

16-17 Nov. 2008