Condenser microphone circuit
A capacitive and microphone technology, applied in the direction of transducer circuits, electrical components, electret electrostatic transducers, etc., can solve the problem of not being able to obtain a large enough output signal amplitude
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[0023] Hereinafter, embodiments of the condenser microphone circuit of the present invention will be described with reference to the drawings. The same reference numerals are assigned to the same components as those in the conventional example shown in FIG. 2 .
[0024]In Fig. 1, reference numeral 5 denotes a built-in power battery, 6 denotes a capacitive acoustic-electric conversion element, 7 denotes a power supply circuit, 8 denotes a buffer amplifier, 10 denotes an optical switch, Q01 denotes an impedance conversion element, and TRS denotes a transformer. One end of the secondary coil of the transformer TRS is connected to terminal pin 2 on the hot (Hot) side, and the other end is connected to terminal pin 3 on the cold (Cold) side. The above-mentioned terminal pin 2 and terminal pin 3 are connected to the output cord through a 3-pin type connector based on the above-mentioned EIAJ standard, for example, and the other terminal pin 1 is connected to the ground line of the m...
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