A 4.23-bit, 12.5 GS/s comparator for high speed flash ADC in BiCMOS technology

Author

Marvast, M. J Taghizadeh ; Ali, M. A Mohd

Author_Institution

Dept. of Electr. Electron. & Syst. Eng., Univ. Kebangsaan Malaysia, Bangi, Malaysia

fYear

2010

fDate

15-17 June 2010

Firstpage

1

Lastpage

4

Abstract

A 4.23-bit, high speed comparator for high-speed flash analog-to-digital converter and X-band applications that can work at a sampling rate of 12.5GS/s is presented in this paper. This fully differential comparator consists of three stages using a new structure to improve its performance. The offset voltage of the designed comparator has been reduced by means of an active positive feedback. The BiCMOS positive feedback and a new structure as output circuit are used to improve sampling rate and performance of comparator. The analyses and simulation results were obtained by using BiCMOS parameters. The comparator can operate with a 1 V peak-to-peak input range consuming 1.09 mW. The predicted performance is verified by analyses and simulations using HSPICE tool.

Keywords

BiCMOS digital integrated circuits; analogue-digital conversion; comparators (circuits); BiCMOS positive feedback; BiCMOS technology; HSPICE tool simulation; X-band; active positive feedback; high speed comparator; high speed flash ADC; high-speed flash analog-to-digital converter; power 1.09 mW; voltage 1 V; word length 4.23 bit; Bandwidth; BiCMOS integrated circuits; CMOS integrated circuits; Inductors; Latches; Power demand; Preamplifiers; Analog-to-digital converter (ADC); comparator; flash; high speed; preamplifier;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent and Advanced Systems (ICIAS), 2010 International Conference on

Conference_Location

Kuala Lumpur, Malaysia

Print_ISBN

978-1-4244-6623-8

Type

conf

DOI

10.1109/ICIAS.2010.5716229

Filename

5716229