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HIGH_GAIN_IC_WITH_TRANSISTOR

2016-05-08 11:27  
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HIGH_GAIN_IC_WITH_TRANSISTOR
High Inputimpedance of RS741C opamp permits use withany general-purpose crystal microphone R2 is volume control,and R3 controls gain and frequency response of IC Power transistor stagedrives loudspeaker directly without outputtransformer、-F M、Mims,″Integrated Circuit Proiects、vol,6、″Radio Shack,Fort Worth,TX,'1977 p 79-88