Title :
A design of controllable gain class B push-pull current amplifier
Author :
Kaewdang, Khanittha ; Surakampontorn, Wanlop ; Fujii, Nobuo
Author_Institution :
Dept. of Electron., King Mongkut´´s Inst. of Technol., Bangkok, Thailand
Abstract :
A controllable gain class-B push-pull current amplifier using CMOS OTAs is proposed. The current amplifier has features of linear current gain controllability, low power consumption, and zero DC bias current. Its current gain can be linearly and electrically controlled by a DC voltage. The proposed current amplifier is designed using EOTAs that consist of P-type and N-type OTAs. Since the amplifier operates as a class-B circuit, thus no DC bias current is required, resulting in low power consumption and a wide signal swing range. The performance of the amplifier is confirmed through SPICE simulation.
Keywords :
CMOS analogue integrated circuits; current-mode circuits; differential amplifiers; gain control; low-power electronics; operational amplifiers; CMOS OTA; DC voltage controlled gain; EOTA; N-type OTA; P-type OTA; class B amplifier; controllable gain current amplifiers; linear current gain control; low power consumption; push-pull current amplifier; wide signal swing range; zero DC bias current; CMOS technology; Circuit simulation; Energy consumption; Mirrors; Operational amplifiers; Power amplifiers; SPICE; Signal processing; Transconductance; Voltage control;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1464903
