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Elect ret Microphone - TI.com

Elect ret Microphone - TI.com

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This topology was selected for a few reasons. First, it allows for single-supply operation to be easily accommodated by biasing the non-inverting input of the op amp to the mid-supply point. Second, the gain of the pre-amp is determined by R2 but the noise gain of the op amp is determined by the ratio of R2 to R1.

  Topology

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