A high-linearity 50-Ω CMOS differential driver for ISDN applications

Author

Castello, Rinaldo ; Nicollini, Germano ; Monguzzi, Pierluca

Author_Institution

Dept. of Electr. Eng., Pavia Univ., Italy

Volume

26

Issue

12

fYear

1991

fDate

12/1/1991 12:00:00 AM

Firstpage

1809

Lastpage

1816

Abstract

A CMOS differential line-driver amplifier that uses positive feedback in the input stage to give transconductance multiplication and pole-zero doublet insertion is reported. The gain-bandwidth product at 60 kHz is 30 MHz and the unity-gain frequency is 2.7 MHz. The circuit operates from a single 5-V power supply and can achieve a total harmonic distortion (THD) of -78 dB for a 6-V_pp differential output signal at 40 kHz and for a load of 100 Ω and/or 150 pF. For the same measuring condition but with a load of 50 Ω and/or 150 pF, the THD is -73 dB. A power supply rejection of more than 76 dB up to 150 kHz was obtained. The chip occupies an area of 1200 mil² in a 1.5-μm CMOS technology and dissipates 20 mW

Keywords

CMOS integrated circuits; ISDN; differential amplifiers; driver circuits; feedback; linear integrated circuits; 1.5 micron; 20 mW; 40 to 150 kHz; 5 V; CMOS differential driver; ISDN applications; high-linearity; line-driver amplifier; monolithic IC; pole-zero doublet insertion; positive feedback; single 5-V power supply; transconductance multiplication; CMOS technology; Differential amplifiers; Distortion measurement; Driver circuits; Feedback; Frequency; ISDN; Power supplies; Total harmonic distortion; Transconductance;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.104172

Filename

104172