Title :
A CMOS Digitally Controlled RF Variable Gain Amplifier
Author :
Weng, Ro-Min ; Chen, Bing-Hung
Author_Institution :
Dept. of Electr. Eng., Nat. Dong Hwa Univ., Hualien
Abstract :
A new digitally controlled decibel-linear variable gain amplifier (VGA) is presented. The proposed VGA uses a folded cascode opamp and a capacitance-selecting technique to provide dB-linear gain control. The VGA provides a 36.6dB gain control range with a gain error less than 0.2dB while operating at 1GHz. It can also be operated at 2GHz to give a 28dB gain control range with an error less than 0.65dB. The power consumption is 10.77mW at 1.8V supply voltage
Keywords :
CMOS integrated circuits; UHF amplifiers; digital control; operational amplifiers; 1 GHz; 1.8 V; 10.77 mW; 2 GHz; 28 dB; 36.6 dB; CMOS technology; RF variable gain amplifier; digital control; folded cascode opamp; linear gain control; Capacitance; Circuits; Digital control; Digital signal processing; Electric variables control; Error correction; Gain control; Radio frequency; Radiofrequency amplifiers; Voltage;
Conference_Titel :
Circuits and Systems, 2006. APCCAS 2006. IEEE Asia Pacific Conference on
Conference_Location :
Singapore
Print_ISBN :
1-4244-0387-1
DOI :
10.1109/APCCAS.2006.342368
