Active compensation of operational transconductance amplifier filters using partial positive feedback

Author

Ramírez-Angulo, Jaime ; SÁnchez-sinencio, Edgar

Author_Institution

Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA

Volume

25

Issue

4

fYear

1990

fDate

8/1/1990 12:00:00 AM

Firstpage

1024

Lastpage

1028

Abstract

An active compensation technique for improving high-frequency performance in OTA-C filters is presented. Each critical OTA is replaced by two OTAs connected in parallel with opposite polarity and with different transconductances. The novel feature of this technique is that it does not require tuning to reduce excess phase and yields filters with extended tuning ranges. It is demonstrated by a programmable bandpass filter from 1 to 9 MHz fabricated in 3-μm CMOS technology

Keywords

CMOS integrated circuits; active filters; band-pass filters; compensation; feedback; linear integrated circuits; radiofrequency filters; 1 to 9 MHz; 3 micron; CMOS technology; OTA filter; OTA-C filters; RF active filters; active compensation technique; high-frequency performance; operational transconductance amplifier filters; parallel connected OTAs; partial positive feedback; phase compensation; programmable bandpass filter; tuning ranges; CMOS technology; Circuit noise; Filters; Frequency; Ionizing radiation; Operational amplifiers; Preamplifiers; Semiconductor device noise; Strips; Transconductance;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.58300

Filename

58300