CMOS automatic gain control circuit with DC offset cancellation for FM/cw ladar

2014 ◽  
Vol 20 (4) ◽  
pp. 310-314
Author(s):  
Yiqiang Zhao ◽  
Min Xu ◽  
Ruilong Pang ◽  
Haixia Yu ◽  
Hongliang Zhao
Keyword(s):  
Automatic Gain Control ◽  
Gain Control ◽  
Control Circuit ◽  
Offset Cancellation ◽  
Dc Offset

scholarly journals A large gain variable range, high linearity, lownoise, low DC offset VGAs used in BD system

2022 ◽  
Vol 355 ◽  
pp. 03050
Author(s):  
Dianwei Zhang ◽  
Fei Chu ◽  
Wu Wen ◽  
Ze Cheng
Keyword(s):  
Supply Voltage ◽  
Automatic Gain Control ◽  
Gain Control ◽  
Low Noise ◽  
Offset Cancellation ◽  
Dc Offset ◽  
Variable Range ◽  
High Linearity ◽  
Noise Characteristics ◽  
Large Gain

In this paper, a large gain variable range, high linearity, low noise, low DC offset VGAs with a simple gain-dB variable circuit are introduced. In the VGAs chain, the last and the first VGAs employ Bipolar transistors, to improve the linearity and noise characteristics. And the middle three stages VGAs employ MOS transistors. The whole circuitry is designed in 0.35um BiCMOS process, including variable gain amplifiers (VGAs) , fixed gain amplifiers , gain control and DC offset cancellation parts. The automatic gain control loop (AGC) provides a process independent gain variable range of 60dB (including 50dB gain-dB-linearity variable range), with a 200us loop lock time, the VGAs provide a 73dB largest gain, the THD is less than 1% at a 1V(P-P) output level; the equivalent output integral noise is 0.011v/√hz@20MHz bandwidth. The whole area is 1173um*494 um, and the power is 7.1mA at 3.3V signal supply voltage.

A novel analog/digital reconfigurable automatic gain control with a novel DC offset cancellation circuit

2011 ◽  
Vol 32 (2) ◽  
pp. 025002
Author(s):  
Xiaofeng He ◽  
Taishan Mo ◽  
Chengyan Ma ◽  
Tianchun Ye
Keyword(s):  
Automatic Gain Control ◽  
Gain Control ◽  
Offset Cancellation ◽  
Dc Offset

A differential automatic gain control circuit with two-stage −10 to 50 dB tuning range VGAs

2013 ◽  
Vol 34 (2) ◽  
pp. 025008 ◽  
Author(s):  
Wenbo Wang ◽  
Luhong Mao ◽  
Xindong Xiao ◽  
Shilin Zhang ◽  
Sheng Xie
Keyword(s):  
Tuning Range ◽  
Automatic Gain Control ◽  
Gain Control ◽  
Control Circuit ◽  
Two Stage
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