RF Variable-Gain Amplifiers and AGC Loops for Digital TV Receivers

Kunihiko IIZUKA; Masato KOUTANI; Takeshi MITSUNAKA; Hiroshi KAWAMURA; Shinji TOYOYAMA; Masayuki MIYAMOTO; Akira MATSUZAWA

doi:10.1093/ietele/e91-c.6.854

Special Section on Analog Circuits and Related SoC Integration Technologies

RF Variable-Gain Amplifiers and AGC Loops for Digital TV Receivers

Kunihiko IIZUKA, Masato KOUTANI, Takeshi MITSUNAKA, Hiroshi KAWAMURA, Shinji TOYOYAMA, Masayuki MIYAMOTO, Akira MATSUZAWA

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Keywords: VGA, AGC, SiGe BiCMOS, CMOS, tuner, IIP3, linearity

JOURNAL RESTRICTED ACCESS

2008 Volume E91.C Issue 6 Pages 854-861

DOI https://doi.org/10.1093/ietele/e91-c.6.854

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Abstract

RF Variable Gain Amplifiers (RF-VGA) are important components for integrated TV broadcast receivers. Analog and digital controlled RF-VGAs are compared in terms of linearity and an AGC loop architecture suitable for digitally controlled RF-VGA is proposed. Further linearity enhancement applicable for CMOS implementation is also discussed.

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