A high speed/power ratio continuous-time CMOS current comparator

Author

Chen, Lu ; Shi, Bingxue ; Lu, Chun

Author_Institution

Inst. of Microelectron., Tsinghua Univ., Beijing, China

Volume

2

fYear

2000

fDate

2000

Firstpage

883

Abstract

Current comparator is a fundamental component of current-mode circuits. A new high-performance continuous-time CMOS current comparator is proposed in this paper, which comprises one CMOS complementary amplifier, two resistive-load amplifiers and two CMOS inverters. A MOS resistor is used as the CMOS complementary amplifier´s negative feedback. Because the voltage swings of the CMOS complementary amplifier are reduced by low input and output resistances, the delay time of the current comparator is shortened. Its power consumption is reduced by the resistive-load amplifiers. Simulation results based on 1.2 μm CMOS technology parameters show the speed/power ratio of this new current comparator is better than existing high-performance current comparators. Besides, the new current comparator occupies small area and is process-robust, so it is suitable for high-speed and low-power applications

Keywords

CMOS analogue integrated circuits; circuit feedback; continuous time systems; current comparators; current-mode circuits; high-speed integrated circuits; integrated circuit design; low-power electronics; 1.2 micron; CMOS complementary amplifier; CMOS current comparator; CMOS inverters; MOS resistor; continuous-time current comparator; current-mode circuits; delay time reduction; high speed/power ratio current comparator; high-performance comparator; high-speed applications; low-power applications; negative feedback; power consumption reduction; resistive-load amplifiers; CMOS process; CMOS technology; Current mode circuits; Delay effects; Energy consumption; Inverters; Mirrors; Power amplifiers; Rail to rail outputs; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits and Systems, 2000. ICECS 2000. The 7th IEEE International Conference on

Conference_Location

Jounieh

Print_ISBN

0-7803-6542-9

Type

conf

DOI

10.1109/ICECS.2000.913017

Filename

913017