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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
IEICE TRANSACTIONS on Electronics
Publication Date: 2008/06/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies)
VGA, AGC, SiGe BiCMOS, CMOS, tuner, IIP3, linearity,
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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.