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DESCRIPTION JPS5911591

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DESCRIPTION JPS5911591
[0001]
Brief description of the drawings
[0002]
FIG. 1 is a view showing an example of a headphone with a microphone used in each
embodiment of FIG. 2, FIG. 3 and FIG. 4, a is a rear view, b is a left side view, and FIG. FIG. 3 is a
circuit diagram showing an embodiment of the present invention in which the changeover switch
is provided on the tape recorder main body side, and FIG. 3 shows another embodiment of the
present invention in which the microphone power supply changeover switch is provided on the
tape recorder main body side. FIG. 4 is a circuit diagram showing one embodiment of the present
invention in which the microphone plug 6 and the microphone jack 11 are also used as a
microphone power switch, and FIG. 5 is a case where the microphone power switch is provided
on the headphone with microphone It is a figure which shows the structural example of
headphones with a microphone, a is a rear view, b is a left view. 2, 2r, 2] ... microphone, 4. 4r, 41:
headphone unit, 10: microphone with headphone, SW1 to SW5: operation mode selection
operation switch, SWIO, SWI 1: microphone power switch, 6.11 ... Microphone power switch
combination microphone / lag and microphone jack 13.13 ′ level detection circuit 14 level
detection contact point 15 detection detection signal line 41 microphone amplifier 42 · · · · · ·
Recording volume, 43 · · · lineup, 44 · · · equalizer amplifier for recording, 47 · · · · recording head,
53 · · · erase head, 54 · · · equalizer amplifier for reproduction, 51 · · · · Amplifier, 5.2: Peak meter,
Q4: Microphone muting transistor, Q6: Disable headphone 4 Because of the transistor. 5ね
4r−し6
16-04-2019
1
16-04-2019
2
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