A 0.1-1 GHz CMOS Variable Gain Amplifier Using Wideband Negative Capacitance

Hangue PARK  Sungho LEE  Jaejun LEE  Sangwook NAM  

IEICE TRANSACTIONS on Electronics   Vol.E92-C   No.10   pp.1311-1314
Publication Date: 2009/10/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E92.C.1311
Print ISSN: 0916-8516
Type of Manuscript: BRIEF PAPER
Category: Electronic Circuits
variable gain amplifier,  wideband,  cascode,  negative capacitance,  

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This Paper presents the design of a wideband variable gain amplifier (VGA) using 0.18 µm standard CMOS technology. The proposed VGA realizes wideband flat gain using wideband flat negative capacitance. It achieves a 3 dB gain bandwidth of 1 GHz with a maximum gain of 23 dB. Also, it shows P1 dB of -33 to -6 dBm over the gain range of -28 to 23 dB. The overall current consumption is 5.5 mA under a 1.5 V supply.