By Topic

Current diversion technique for the design of broadband variable gain amplifiers

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)
Duy-Dong Pham ; Inst. of Microelectron., A*STAR (Agency for Sci., Technol. & Res.), Singapore, Singapore ; Kai Kang ; Lin, F.

This paper presents a new technique for the design of broadband variable gain amplifiers (VGA). The proposed technique uses current diversion concept to provide gain variation function for the broadband amplifier. Since gain variation is achieved without compromising voltage headroom, it facilitates low power design of the VGA. Since DC levels of output signals of each stage stay constant, it also enables DC coupling between cascaded stages of the VGA. Both voltage controlled and digital controlled VGAs can be realized using the proposed technique. To demonstrate the feasibility of the technique, a digital controlled VGA was implemented in 90 nm CMOS which has bandwidth from 10 MHz to 2.8 GHz, gain ranging from 22 to 42.9 dB with 3 dB gain steps, and power consumption of 1.94 mW.

Published in:

Communication Systems (ICCS), 2010 IEEE International Conference on

Date of Conference:

17-19 Nov. 2010