CMOS current-mode exponential-control variable-gain amplifier

Authors
Chang, CC Lin, ML Liu, SI
Citation
Cc. Chang et al., CMOS current-mode exponential-control variable-gain amplifier, ELECTR LETT, 37(14), 2001, pp. 868-869
Citations number
7
Categorie Soggetti
Eletrical & Eletronics Engineeing
Journal title
ELECTRONICS LETTERS
ISSN journal
00135194 → ACNP
Volume
37
Issue
14
Year of publication
2001
Pages
868 - 869
Database
ISI
SICI code
0013-5194(20010705)37:14<868:CCEVA>2.0.ZU;2-P
Abstract
A CMOS current-mode exponential-control variable-gain amplifier is presente d. It consists of a first-order current-mode pseudo-exponential circuit and a current-mode multiplier. Based on the Taylor's series expansion, the pse udo-exponential circuit can be realised by MOSFETs in saturation. The propo sed circuit has been fabricated in a 0.5 mum N-well CMOS process with a gai n central range of 15dB. The experimental results confirm the feasibility o f the proposed variable-gain amplifier.