Single Transistor High-Impedance Tail Current Source With Extended Common-Mode Input Range and Reduced Supply Requirements

Author

Ramirez-Angulo, Jaime ; Carvajal, Ramón G. ; López-Martín, Antonio J.

Author_Institution

New Mexico State Univ., Las Cruces

Volume

54

Issue

7

fYear

2007

fDate

7/1/2007 12:00:00 AM

Firstpage

581

Lastpage

585

Abstract

A compact implementation of a single transistor tail current source with very high output impedance (>40 MOmega) and low-voltage requirements is introduced. The tail transistor can operate with less than a drain-source saturation voltage and allows implementation of low-voltage differential pairs with wide common-mode input range and very high common-mode rejection ratio. Simulation and experimental results are shown that validate the proposed circuit.

Keywords

CMOS analogue integrated circuits; differential amplifiers; operational amplifiers; CMOS analog integrated circuit; common-mode input range; common-mode rejection ratio; differential amplifiers; operational amplifiers; single transistor high-impedance tail current source; Analog circuits; Breakdown voltage; CMOS technology; Circuit simulation; Differential amplifiers; Impedance; Low voltage; Mirrors; Tail; Threshold voltage; CMOS analog integrated circuits; differential amplifiers; low-voltage analog circuits; operational amplifiers;

fLanguage

English

Journal_Title

Circuits and Systems II: Express Briefs, IEEE Transactions on

Publisher

ieee

ISSN

1549-7747

Type

jour

DOI

10.1109/TCSII.2007.896817

Filename

4273647