Design of CMOS Variable Gain Amplifier for DTV Tuners

Author

Yu, Shuping ; Ye, Yunfei

Author_Institution

Dept. of Autom., Nanjing Inst. of Railway Technol., Nanjing

Volume

2

fYear

2009

fDate

25-26 April 2009

Firstpage

10

Lastpage

12

Abstract

A CMOS variable gain amplifier (VGA) is designed, which is suitable for the turner of digital video broadcasting-cable(DVB-C). The amplifier is consists of exponential control circuit, amplifier circuit and common mode feedback circuit. The exponential circuit is presented by an approximate exponential function. The VGA is fabricated in 0.35 mum CMOS technology, and is simulated by Mentorpsilas circuit simulation tool Eldo. Simulation results show that the VGA core consumes 4.63 mW at 3.3 V supply voltage and has a gain range from 0 to 32 dB. The frequency range is 46 MHz~267 MHz and noise figure is less than 10 dB.

Keywords

CMOS integrated circuits; UHF amplifiers; cable television; circuit tuning; digital video broadcasting; integrated circuit design; CMOS variable gain amplifier; DTV tuners; Mentor circuit simulation tool; common mode feedback circuit; digital video broadcasting-cable; exponential control circuit; gain 0 dB to 32 dB; power 4.63 mW; size 0.35 mum; voltage 3.3 V; CMOS technology; Circuit simulation; Digital TV; Digital video broadcasting; Feedback circuits; Frequency; Gain; Noise figure; Tuners; Voltage; DTV Tune; Exponential function; VGA;

fLanguage

English

Publisher

ieee

Conference_Titel

Networks Security, Wireless Communications and Trusted Computing, 2009. NSWCTC '09. International Conference on

Conference_Location

Wuhan, Hubei

Print_ISBN

978-1-4244-4223-2

Type

conf

DOI

10.1109/NSWCTC.2009.234

Filename

4908393