A dynamic CMOS comparator with high precision and resolution

Author

Wu Rang ; Xiaobo, Wu ; Xiaolang, Yan

Author_Institution

Inst. of Very Large Scale Integrated Circuit Design, Zhejiang Univ., China

Volume

2

fYear

2004

fDate

18-21 Oct. 2004

Firstpage

1567

Abstract

High precision dynamic comparator is of key importance to some mixed signal circuits like SAR A/D converter. By using a dynamic positive feedback latch, a CMOS comparator has been proposed. Simulation proved that its LSB (least significant bit) is 0.015mV, the dynamic input range covers near the whole supply voltage and the power dissipation is 6.28mW. It has been applied to a new SAR CMOS A/D converter with high resolution of 14-bit and operating frequency of 3.6MHz. Its reliability and applicability were proven by corner simulation.

Keywords

CMOS integrated circuits; analogue-digital conversion; comparators (circuits); -40 to 100 C; 122 dB; 188 micron; 3.6 MHz; 4.5 to 5.5 V; 400 micron; 6.28 mW; SAR analog-to-digital converter; dynamic CMOS comparator; dynamic input range; dynamic positive feedback latch; least significant bit; mixed signal circuit; power dissipation; Circuit simulation; Feedback; Integrated circuit synthesis; Latches; Power dissipation; Power supplies; Signal resolution; Switches; Very large scale integration; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State and Integrated Circuits Technology, 2004. Proceedings. 7th International Conference on

Print_ISBN

0-7803-8511-X

Type

conf

DOI

10.1109/ICSICT.2004.1436918

Filename

1436918