用于CMOS图像传感器的AGC放大器设计
esign of an AGC amplifier for CMOS image sensor
设计了一种自动增益控制(AGC)放大器。该AGC放大器使用线性跨导技术的可变增益放大器(VGA)，可实现较好的线性度。利用下峰值检测电路检测信号大小和简洁的调整电路控制VGA增益，并设计了一种无启动电路的带隙基准电路为整个系统提供基准电压。经过SMIC的0.35 μm CMOS工艺仿真验证，结果表明，所设计的自动增益控制放大器可以实现100 kHz的信号从54.12 dB的输入动态压缩到7.36 dB的输出。
n automatic gain control (AGC) amplifier for CMOS image sensor has been designed. The AGC amplifier adopts translinear a variable gain amplifier (VGA) to realize a good linearity. It detects valley to present the strength of signal, and uses a succinct adjustment circuit to control the gain of VGA. A bandgap reference that does not need start-up circuit has been designed for the whole system. Simulated in SMIC 0.35 ?m CMOS, it can compress the dynamic range of 54.12 dB input to 7.36 dB output.
崔先慧、邓业磊、余国义、张乐
微电子学、集成电路电子电路
图像传感器自动增益控制可变增益放大器带隙基准
image sensorautomatic gain control (AGC)variable gain amplifier (VGA)bandgap reference
崔先慧,邓业磊,余国义,张乐.用于CMOS图像传感器的AGC放大器设计[EB/OL].(2013-02-17)[2025-08-21].http://www.paper.edu.cn/releasepaper/content/201302-300.点此复制
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