Low-voltage CMOS analog switch for high precision sample-and-hold circuit

Author

Fayomi, Christian Jesus B ; Roberts, Gordon W. ; Sawan, Mohamad

Author_Institution

Dept. of Electr. & Comput. Eng., Ecole Polytech. de Montreal, Que., Canada

Volume

2

fYear

2000

fDate

2000

Firstpage

710

Abstract

This paper presents a sample-and-hold circuit based on a novel implementation of the bootstrapped low-voltage analog CMOS switch. The heart of this circuit is a new low-voltage and low-stress CMOS clock voltage doubler. Through the use of a dummy switch, the charge injection induced by the bootstrapped switch is greatly reduced resulting in improved sample-and-hold accuracy. Simulation results using a 0.18 μm digital CMOS process show that a resolution greater than 16 bits can be obtained with a 1.65 V supply voltage. Operation is also possible for supply voltages close to transistor threshold (e.g., 0.5 V)

Keywords

CMOS analogue integrated circuits; bootstrap circuits; sample and hold circuits; switching circuits; 0.18 μm; 0.18 micron; 0.5 V; 1.65 V; 1.65 supply voltage; CMOS clock voltage doubler; bootstrapped low-voltage analog switch; charge injection; dummy switch; sample-and-hold circuit; CMOS analog integrated circuits; Circuit simulation; Clocks; Conductivity; Linearity; MOSFETs; Switched capacitor circuits; Switches; Switching circuits; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2000. Proceedings of the 43rd IEEE Midwest Symposium on

Conference_Location

Lansing, MI

Print_ISBN

0-7803-6475-9

Type

conf

DOI

10.1109/MWSCAS.2000.952855

Filename

952855