An ultra low noise audio preamplifier particularly suited to microphone preamplification including balanced microphones. The IC features wide bandwidth, low distortion only 0.007% at a gain of 100, and very low noise only 1.3nV/Hz for source impedance s up to 4kohm.
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Microphone [...]
Below is the microphone circuit diagram for sound card system. I crack my microphone sound blaster type.
LOW Impedane Microphone Preamplifier by IC TL084
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