Title :
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
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;
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
DOI :
10.1109/NSWCTC.2009.234
