Title :
Fast settling GaAs operational amplifiers for switched capacitor applications
Author :
Toumazou, Christofer ; Haigh, D.G. ; Richards, O.
Author_Institution :
Dept. of Electr. Eng., Imperial Coll., London, UK
Abstract :
Consideration is given to fast-settling high-gain GaAs operational amplifiers for high-frequency switched-capacitor-filter applications. A previous amplifier with a gain of 60 dB is critically assessed from the point of view of settling time, and the device geometry is altered to reduce settling time from 450 ps to a minimum of 360 ps. General circuit techniques for obtaining faster settling are developed, leading to two designs which have gains still exceeding 60 dB but with minimum settling times now approaching 200 ps
Keywords :
III-V semiconductors; active filters; field effect integrated circuits; gallium arsenide; linear integrated circuits; operational amplifiers; switched capacitor filters; 200 to 360 ps; 60 dB; GaAs; HF SC applications; III-V semiconductors; fast-settling; high-frequency; high-gain; operational amplifiers; switched-capacitor-filter; Circuit simulation; Educational institutions; Filters; Frequency; Gallium arsenide; Operational amplifiers; Output feedback; Pulse amplifiers; Switched capacitor circuits; Voltage;
Conference_Titel :
Circuits and Systems, 1989., IEEE International Symposium on
Conference_Location :
Portland, OR
DOI :
10.1109/ISCAS.1989.100437
