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JPS5854193

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DESCRIPTION JPS5854193
[0001]
Brief description of the drawings
[0002]
1 is a frequency characteristic diagram of sound pressure level by acceleration type MFB, FIG. 2
is a frequency characteristic diagram of sound pressure level by speed type MFB, FIG. 3 is a
frequency characteristic diagram of sound pressure level by amplitude type MFB, FIG. The figure
shows a conventional bridge detection circuit, FIG. 5 is an equivalent circuit diagram thereof, FIG.
6 is a frequency characteristic diagram of the detection signal level by the circuit of FIG. 4 and
FIG. 7 is a differentiated version of the signal of FIG. Fig. 8 shows the impedance characteristic of
the speaker, Fig. 9 shows the improved bridge circuit, Fig. 10 shows the impedance characteristic
of the LC resonant circuit, and Fig. 11 shows the present invention. FIG. 12 shows a bridge
detection circuit according to FIG. And VB and FIG. 13 shows the characteristics of the detection
signal.
07-05-2019
1
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