Title :
Gain and bandwidth boosting techniques for high-speed operational amplifiers
Author :
Amourah, Mezyad M. ; Geiger, Randall L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Iowa State Univ., Ames, IA, USA
Abstract :
CMOS continuous-time and switched-capacitor filters which operate at high frequencies with high quality factor are difficult to realize. The finite gain and the finite bandwidth of the integrator amplifiers are the main limitation. This paper describes two techniques to simultaneously increase bandwidth, transconductance, and DC gain of an amplifier without changing the excess bias or the power dissipation. Implementations of a continuous-time band-pass filter to demonstrate the high frequency capabilities of the proposed architectures are described
Keywords :
CMOS analogue integrated circuits; Q-factor; band-pass filters; continuous time filters; differential amplifiers; feedback amplifiers; high-speed integrated circuits; operational amplifiers; switched capacitor filters; CMOS SC filters; CMOS continuous-time filters; DC gain boosting techniques; bandwidth boosting techniques; continuous-time band-pass filter; high frequency capabilities; high-speed opamps; high-speed operational amplifiers; integrator amplifiers; positive feedback; switched-capacitor filters; transconductance; Bandwidth; Boosting; Circuits; Filters; Frequency; Operational amplifiers; Power dissipation; Q factor; Switching converters; Transconductance;
Conference_Titel :
Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6685-9
DOI :
10.1109/ISCAS.2001.921833
