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JPS5778298

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DESCRIPTION JPS5778298
Description 1 Title of Invention
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a conventional sound
generation drive circuit. FIG. 2 is a micro-speaker drive waveform diagram (square wave). FIG. 5
is an example of an operation waveform diagram in 4 of the sound generation drive circuit. FIG. 4
is a drawing showing the synthesis of two signals by a square wave. Fig. 5 shows an example of
general signal wave addition. Figure 6 shows an example of a drive circuit for realizing the
present invention. FIG. 7 is a drawing of the present invention applied to a watch. (A) Top view
(b) Partial sectional view Fig. 8 is another partial sectional view of the present invention applied
to a wristwatch. FIG. 9 is a top view of the electronic desk calculator according to the present
invention. l・1’:LSI2:トランジスタ3 13・13′°。 13 ′ ′: micro speaker
(13, 13 ′: electromagnetic type, 13 ′ ′: piezoelectric type) 5 · 5 ′ · 6 · 6 I: fundamental wave
7 · 7 ′ ′ two synthetic waves 8: oscillation circuit 9: control circuit 10: division 1] ,: Watch 12:
Liquid crystal display 14: Electronic desk calculator Patent applicant Namiki Precision Jewelry
Co., Ltd. EndPage: 2
02-05-2019
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