用于CDMA应用的2.7 v单片sighbt可变增益放大器

Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573) Pub Date : 2002-11-07 DOI:10.1109/RAWCON.2002.1030148

Chang-Woo Kim, Sung-ryong Park, Young-Gi Kim

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引用次数: 0

摘要

开发了一种具有高db线性增益控制和高线性度的单片SiGe HBT变增益放大器，用于CDMA应用。VGA在824-849 MHz的2.7 vdc控制电压范围内实现30db的动态增益控制范围。在中心频率为835 MHz时，增益和衰减分别为23 dB和7 dB。尽管增益控制电压发生变化，输入/输出驻波比仍保持低且恒定。在2.7 V的低工作电压下，VGA的输出功率为5 dBm，功率增益为20 dB，在/spl plusmn/885 KHz偏置频段的ACPR为-57 dBc。

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

A monolithic SiGe HBT variable gain amplifier with high dB-linear gain control and high linearity has been developed for CDMA applications. The VGA achieves 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 dB and 7 dB, respectively. Input/output VSWR 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 /spl plusmn/885 KHz offset bands.

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Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573)

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