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JPS5911590

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DESCRIPTION JPS5911590
[0001]
Brief description of the drawings
[0002]
FIG. 1 shows an example of the entire configuration of an audio apparatus to which the present
invention is applied, where a is a state during reproduction, b is a state during recording, and FIG.
FIG. 3 is a circuit diagram showing one embodiment of the present invention, and FIG. 4 is a
circuit diagram showing another embodiment of the present invention. 2, 2r, 21 ... microphones
4. 4r, 41: headphone unit, 10: headphone with microphone, SW1 to SW5: operation mode
selection operation switch 26, 36.60: plunger, 32: reel motor, 41: Microphone amplifier 42:
recording volume 43: line amplifier 44: equalizer amplifier for recording 47: recording and
reproducing head 53: erasing head 54: equalizer amplifier for reproduction 51 ··· Meter amplifier,
52 ··· Peak meter, Q4. Q5: a transistor for muting, Q6: a transistor for making the headphone 4
inoperable.
10-05-2019
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