Low-voltage, low-power CMOS high dynamic range dB-linear VGA for super heterodyne receivers

被引：0
|
作者：
Dong, Qiao [1 ]
Geng, Li [1 ]
Shao, Zhibiao [1 ]
机构：
[1] Department of Microelectronics, Xi'an Jiaotong University, Xi'an 710049, China
来源：
Pan Tao Ti Hsueh Pao/Chinese Journal of Semiconductors | 2007年 / 28卷 / 11期
关键词：
CMOS integrated circuits - Electric potential - Gain control - Signal receivers - Wireless telecommunication systems;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
This paper presents a low-voltage low-power variable gain amplifier, which is applied in the automatic gain control loop of a super heterodyne receiver. Six stages are cascaded to provide an 81 dB digitally controlled gain range in a 3 dB step. The gain step error is less than 0.5 dB. It operates at an intermediate frequency of 300 kHz, and the power consumption is 1.35 mW from a 1.8 V supply. The prototype chip is implemented in a TSMC's 0.18 μm 1P6M CMOS process and occupies approximately 0.24 mm2. It is very suitable for portable wireless communication systems. The measurement results agree well with the system requirements.
引用
收藏
页码：1690 / 1695
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