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文章介绍ＡＤＩ公司的可变增益运放ＡＤ６０３的工作原理及使用要点，给出了以该芯片为核心构成的一种低噪、宽带程控增益放大器的实用电路。
The article introduces the working principle and the key points of ADI's variable gain operational amplifier AD603, and presents a practical circuit of a low noise and wideband programmable gain amplifier with this chip as the core.