A 2.7-V monolithic SiGe HBT variable gain amplifier for CDMA applications

被引：0
|
作者：
Kim, CW [1 ]
Park, SR [1 ]
Kim, YG [1 ]
机构：
[1] Kyung Hee Univ, Coll Elect & Informat Eng, Yongsin Si 449701, Kyunggi Do, South Korea
来源：
RAWCON 2002: IEEE RADIO AND WIRELESS CONFERENCE, PROCEEDINGS | 2002年
关键词：
D O I：
10.1109/RAWCON.2002.1030148
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
A monolithic SiGe HBT variable gain amplifier with high dB-linear gain control and high linearity has been developed for CDMA applications. The VGA achives a dynamic gain control range of 30 dB with 2.7-Vdc control-voltage range in 824-849 MHz The maximum gain and attenuation at a center frequency of 835 MHz are 23 dR and 7 dB, respectively Input/output VSWRs keep low and constant despite change in the gain-control voltage. At a low operation voltage of 2.7 V. the VGA produces a output power of 5 dBm with 20 dB power gain and-57 dBc ACPR at +/-885 KHz offset bands.
引用
收藏
页码：185 / 188
页数：4
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