NDLI: 70 dB Dynamic Range CMOS Wideband Digital Variable Gain Amplifier for AGC in DVB-T/H Receivers

Content Provider	SpringerLink
Author	Wang, Chua Chin Huang, Chi Chun Lee, Ching Li Lin, Li Ping Tseng, Yih Long
Copyright Year	2008
Abstract	This paper presents a novel variable gain amplifier (VGA) design which is applied in the automatic gain control loop of digital video broadcasting (DVB) receivers designed for standards DVB-T/H. The VGA is composed of three cascaded tunable gain stages to provide a 70 dB dynamic range with 2 dB gain steps. Each gain stage is based on a digital variable gain amplifier (DVGA) which is composed of a plurality of gain blocks (GBs) and a fully differential degeneration amplifier (FDDA). The GBs of the DVGA are digitally controlled current mirrors. A common-mode feedback circuitry is used to stabilize the FDDA by providing a stable common-mode voltage. Physical measurements on silicon show that the gain error is merely 0.55 dB given a 70 dB tuning range.
Starting Page	367
Ending Page	379
Page Count	13
File Format	PDF
ISSN	0278081X
Journal	Circuits, Systems, and Signal Processing
Volume Number	27
Issue Number	3
e-ISSN	15315878
Language	English
Publisher	SP Birkhäuser Verlag Boston
Publisher Date	2008-06-03
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Automatic Control Variable Gain Amplifier SOC Electronics and Microelectronics, Instrumentation Signal, Image and Speech Processing Electronic and Computer Engineering Circuits and Systems
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Signal Processing

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70 dB Dynamic Range CMOS Wideband Digital Variable Gain Amplifier for AGC in DVB-T/H Receivers