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

fYear

2011

fDate

15-17 April 2011

Firstpage

134

Lastpage

137

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Electric Information and Control Engineering (ICEICE), 2011 International Conference on

Conference_Location

Wuhan

Print_ISBN

978-1-4244-8036-4

Type

conf

DOI

10.1109/ICEICE.2011.5777654

Filename

5777654