Title :
A wide tunable range pseudo-differential OTA
Author :
Wei, Jing ; Wang, Weidong
Author_Institution :
Dept. of Inf. & Correspondence Eng., Guilin Univ. of Electron. Technol., Guilin, China
Abstract :
This paper introduces a CMOS-based linearly tunable transconductor operational transconductance amplifier (OTA). The realization technique is achieved by using a pseudo differential transconductor and a programmable-gain current amplifier working in saturation region, for a power supply of ±0.9V. Its transconductance gain can be linearly tuned by an external bias current for more than three decades and -3 dB bandwidth of 687.5MHz. The CMOS OTA is designed in 0.18μm SMIC technology. The performance of the proposed circuit is discussed and confirmed through Cadence Spectre simulation results.
Keywords :
CMOS integrated circuits; operational amplifiers; CMOS-based OTA; Cadence Spectre simulation; external bias current; frequency 687.5 MHz; programmable-gain current amplifier; pseudo-differential operational transconductance amplifier; saturation region; size 0.18 mum; voltage -0.9 V to 0.9 V; Bandwidth; CMOS integrated circuits; Feedforward neural networks; MOSFETs; Mirrors; Transconductance; Analog integrated circuits; CMOS OTA; pseudo-differential transconductor; tunable transconductors;
Conference_Titel :
Electric Information and Control Engineering (ICEICE), 2011 International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-8036-4
DOI :
10.1109/ICEICE.2011.5777654
