A Wideband CMOS Variable Gain Amplifier With an Exponential Gain Control

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dc.contributor.authorLee, Hui Dong-
dc.contributor.authorLee, Kyung Ai-
dc.contributor.authorHong, Songcheol-
dc.date.accessioned2007-09-27T13:21:25Z-
dc.date.available2007-09-27T13:21:25Z-
dc.date.issued2007-06-01-
dc.identifier.citationIEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 55, NO. 6, pp.1363-1373en
dc.identifier.issn0018-9480-
dc.identifier.urihttp://hdl.handle.net/10203/1578-
dc.description.abstractA CMOS wideband cascaded variable gain amplifier (VGA) with a temperature-independent exponential gain control characteristic is presented in this paper. The exponential gain control function is realized using parasitic bipolar transistors and a control signal converter. The bandwidth is extended using an inductive peaking technique for high-frequency operations. The gain of the VGA varies from 38.8 to 55.3 dB in relation to the control voltage that varies from 0 to 1.8 V. The bandwidth of the proposed VGA is approximately 900 MHz with a gain control range of 94.1 dB. The proposed VGA includes a dc offset cancellation loop to avoid amplification of the dc offset. TheVGAis powered by 1.8 V with 11.4 mA. The VGA chip including bondpads occupies an area of 850 m 490 m.en
dc.description.sponsorshipThe authors would like to thank to Dr. C.-H. Kim, Teltron Inc., Daejeon, Korea, for his useful discussions.en
dc.language.isoen_USen
dc.publisherIEEEen
dc.subjectCMOS analog integrated circuiten
dc.subjectgain controlen
dc.subjectlinear-in-decibel gain characteristicen
dc.subjecttemperature compensationen
dc.subjectvariable gain amplifier (VGA)en
dc.subjectwideband systemsen
dc.titleA Wideband CMOS Variable Gain Amplifier With an Exponential Gain Controlen
dc.typeArticleen

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