Title :
Switched Capacitor Sample-and-Hold Circuit with Input Signal Range beyond Supply Voltage
Author :
Centurelli, Francesco ; Simonetti, Andrea ; Trifiletti, Alessandro
Author_Institution :
Dept. of Electron. Eng., Univ. of Rome "La Sapienza", Rome, Italy
Abstract :
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.
Keywords :
CMOS integrated circuits; analogue-digital conversion; sample and hold circuits; switched capacitor networks; 0.13 ¿m CMOS technology; flip-around sample-and-hold; gate-bootstrapped circuit; input signal range beyond supply voltage; low-voltage analog-to-digital converters; switched capacitor sample-and-hold circuit; Analog-digital conversion; CMOS technology; Circuit simulation; Dynamic range; Sampling methods; Switched capacitor circuits; Switches; Switching circuits; System-on-a-chip; Voltage; Analog-to-digital converters; Gate-Bootstrapping; Low-voltage; Sample-and-hold circuits;
Conference_Titel :
NORCHIP, 2008.
Conference_Location :
Tallinn
Print_ISBN :
978-1-4244-2492-4
Electronic_ISBN :
978-1-4244-2493-1
DOI :
10.1109/NORCHP.2008.4738286
