By Topic

A novel OTA with digitally controlled and linearly tunable transconductance

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Zhi-jun Li ; Coll. of Inf. Eng., Xiangtan Univ., Xiangtan, China ; Yi-cheng Zeng ; Bin Liu

An operational transconductance amplifier (OTA), where its transconductance gain can be digitally controlled and linearly tuned, is proposed in this paper. The realization method is achieved by biasing the two fully balanced differential pairs with class AB current mirror and the current division network (CDN). gm of the proposed OTA can be linearly tuned by an external control current Iadj and the digitally controlled current gain α in the range of 0 to 500uS. The input-voltage range of about 200mVp-p with less than 1.0% nonlinearity is obtained. The performance of the proposed OTA is discussed and confirmed through an application example and PSPICE simulation results.

Published in:

Consumer Electronics, Communications and Networks (CECNet), 2012 2nd International Conference on

Date of Conference:

21-23 April 2012