Title :
Pseudo-class-AB telescopic-cascode operational amplifier
Author :
Taherzadeh-Sani, M. ; Lotfi, R. ; Shoaei, O.
Author_Institution :
ECE Dept., Univ. of Tehran, Iran
Abstract :
A novel class-AB architecture for single-stage operational amplifiers is presented. The structure employs a switched-capacitor level shifter to provide a signal-dependent current in the current source of the common-source amplifier. Applying this pseudo-class-AB approach to a telescopic-cascode opamp enhances the effective values of the slew rate and the transconductance and thus the opamp speed.
Keywords :
constant current sources; operational amplifiers; switched capacitor networks; class-AB architecture; common-source amplifier; current source; signal-dependent current; single-stage operational amplifiers; slew rate; telescopic-cascode operational amplifier;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20040112
