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介绍了一种高性能微电压放大器的原理及应用，该放大器的放大倍数能达到１００ｄＢ，信噪比为２０～４０ｄＢ．
The principle and application of a high performance micro-voltage amplifier are introduced. The amplifier can achieve a gain of 100dB and a signal-to-noise ratio of 20 ~ 40dB.