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Transformerless balanced input microphone amplifier
Source: InternetPublisher:闪电杰克 Keywords: No transformer amplifier signal source Updated: 2021/03/29
This circuit is a low input impedance (2kO) differential amplifier composed of an OP amplifier . The signal source resistance can be below 2000, although the voltage gain is up to
sodB (316 times), but since the OP37 has no phase compensation, when the input terminal is turned on and the feedback amplitude is 100", it will cause oscillation, so a resistor
is connected in parallel at the input terminal. Rp, reduce the magnification of Silu to 10 to prevent vibration.
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