JPS5957089

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DESCRIPTION JPS5957089
[0001]
Brief description of the drawings
[0002]
FIG. 1 is a circuit diagram showing a conventional example, and FIG. 2 is a circuit diagram
showing an embodiment according to the present invention. DESCRIPTION OF SYMBOLS 10 ...
Microphone, 12 ... Impedance converter, 13 ... Battery, 14 ... Diode, 15 ... External power supply
input terminal, 16 ... Microphone signal output terminal, 17 ... Ground terminal . □
01-05-2019
1