基于AD603的超声微弱信号检测研究

Ordnance Industry Automation(2007)

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Abstract
针对不同检测对象的回波信号必须进行相应放大以便作后续处理的现象,设计实现以AD603为核心的超声回波检测自动变增益放大电路.其超声回波信号从电路左端输入,先经AD603程控放大,单片机输出稳定电压控制增益,使得放大后的回波信号最大幅值不超过500mV,之后再由AD844固定放大10倍,使得回波信号在0~5 V之间输出,为后续回波信号的处理、研究做好准备.
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Key words
Ultrasonic ultrasonic,AGC,Detecting,AD603
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