High Dynamic Range Variable Gain Amplifier Using 130 nm CMOS Technology for Triple-band W-CDMA Applications
This paper presents a high dynamic range variable gain amplifier (VGA) using 130 nm CMOS technology for the triple-band W-CDMA applications. The VGA includes an active balun,a two-stage amplifier,two SPDT switches,and a V-I converter which converts a dc control voltage to the dc current for controlling the gain of the each amplifier. The operation voltage is 2.5 V. The dynamic range is over 100 dB at 800 MHz-band and 84 dB at 2 GHz-band. To realize high dynamic range with the two-stage amplifier,a novel exponential approximation function for V-I converter is proposed. The maximum outpat power at 800 MHz is 7 dBm withA gain of 27 dB. At this rated output power,the adjacent channel power rejection (ACPR)In+/-5 MHz. offset frequency bands are -43 dBc which is highly linear performance.
Yong-Ju Suh Shohei Ishikawa Hiroshi Ohta Ryuichi Fujimoto Nobuyuki Itoh Toshihiko Yoshimasu
Graduate School of Information,Production,and Systems,Waseda University Semiconductor Company,Toshiba Corporation
国际会议
2008 International Conference on Microwave and Millimeter Wave Technology(2008国际微波毫米波技术会议)
南京
英文
139-142
2008-04-21(万方平台首次上网日期,不代表论文的发表时间)