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DESCRIPTION JPS5960714

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DESCRIPTION JPS5960714
[0001]
Brief description of the drawings
[0002]
FIG. 1 is a circuit diagram of a magnetic recording and reproducing apparatus having a
conventional built-in microphone, FIG. 2 is a circuit diagram of a magnetic recording and
reproducing apparatus having a conventional built-in microphone and having a muting circuit,
and FIG. It is a circuit diagram of a magnetic recording and reproducing apparatus according to
the invention. 2 ... Recording and reproducing amplifier, 3 ... Negative feedback circuit at the time
of reproduction, 4 ... Negative feedback circuit at the time of recording, 9 ... Built-in microphone,
SWl. sw2. Sw3. Sw4 ... recording and reproduction switch, 12 ... impedance circuit.
16-04-2019
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