Title :
A 0.8-3GHz 40dB dynamic range CMOS variable-gain amplifier
Author :
Huang, Xingli ; Qin, Xi ; Qin, Yajie ; Fang, Hao ; Hong, Zhiliang
Author_Institution :
State Key Lab. of ASIC & Syst., Fudan Univ., Shanghai, China
Abstract :
A wideband variable gain amplifier which provides 40dB dynamic gain range using dual-loop feedback Cherry-Hooper topology is presented. A modified negative capacitive neutralization technique is proposed to improve the frequency response with a reasonable cost of power consumption. This VGA is implemented in SMIC 0.13μm 1P8M CMOS technology, and occupies 0.3 mm2 active area. The measurement results show that its -3dB bandwidth is from 800MHz to 3GHz. It consumes 21.6 mW at 1.2V power supply. The maximum input P1dB with a preceding LNA is -27dBm at an overall gain of -0.5dB.
Keywords :
CMOS analogue integrated circuits; circuit feedback; frequency response; low noise amplifiers; network topology; power consumption; wideband amplifiers; CMOS variable-gain amplifier; Cherry-Hooper topology; LNA; SMIC 1P8M CMOS technology; VGA; dual-loop feedback; frequency 0.8 GHz to 3 GHz; frequency response; gain -0.5 dB; gain 40 dB; negative capacitive neutralization technique; power 21.6 mW; power consumption; size 0.13 mum; voltage 1.2 V; wideband variable gain amplifier; Gain measurement; Wireless communication;
Conference_Titel :
ASIC (ASICON), 2011 IEEE 9th International Conference on
Conference_Location :
Xiamen
Print_ISBN :
978-1-61284-192-2
Electronic_ISBN :
2162-7541
DOI :
10.1109/ASICON.2011.6157383
