A Low Gain Error Two-Stage dB-Linear Variable Gain Amplifier in 0.35 μm CMOS Process

被引：0
|
作者：
Wang, Yongsheng [1 ]
Li, Xinzhi [1 ]
Zhang, Zhixin [1 ]
Lai, Fengchang [1 ]
机构：
[1] Harbin Inst Technol, Microelect Dept, Harbin 150000, Heilongjiang, Peoples R China
来源：
2017 IEEE 12TH INTERNATIONAL CONFERENCE ON ASIC (ASICON) | 2017年
关键词：
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A CMOS linear-in-dB variable gain amplifier (VGA) is presented in this paper and the dB-linear gain is controlled linearly by the control voltage. The VGA incorporates a pre-amp, a gain control stage and a fixed gain amplifier. In order to ensure gain range and reduce gain error, a two-stage gain control stage is proposed. The proposed dB-linear VGA designed in a 0.35um CMOS process achieves a variable gain range of 50 dB with a +/- 0.7-dB gain error. For output voltage swing of 1Vp-p, the total harmonic distortion (THD) is-59dB while the control voltage is zero. The VGA can provide 75MHz 3dB bandwidth and the power consumption of the whole circuit is about 9.55mW with a +/- 2.5V power supply.
引用
收藏
页码：367 / 370
页数：4
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