Title :
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
fDate :
8/1/1990 12:00:00 AM
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;
Journal_Title :
Solid-State Circuits, IEEE Journal of
