著者

小平 光治 後藤 光浩 池田 勝幸 小松 秀敏

出版者

一般社団法人 日本時計学会

雑誌

日本時計学会誌 (ISSN:00290416)

巻号頁・発行日

vol.99, pp.30-40, 1981

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The musical alarm clocks and watches appeared about three years ago. Recently, more than lO,OOO,OOO pcs digital watches with musical alarm function are produced annually all over the world. The reason of this prosperity is that musical alarm fits more for young people's sensitivity than beep sound alarm. For there market requirements, we have developed musical chips which play comfortable melodies automatically and can be driven by low voltage source. In the process of developing them, we examined from many viewpoints such as low power supply, low current consumption, dignity of sound and frequency limits. Then we have obtained an efficient linear amplifier and excellent melody generation system.