フォーン・ダイアラ・ウォッチの開発
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概要
- 論文の詳細を見る
A new data bank watch named Phone Dialer has been developed. It is capable to dial the push-button telephone by being coupled acoustically to the telephone handsets. The technical feature are as follws:(1) The low power Dual Tone Multi-Frequency (DTMF) generator is driven by low voltage (3 V lithium battery) and low frequency (32768 Hz quartz oscillator). (2) One chip C-MOS LSI contains DTMF generator, LPF's (switched capacity), and amplifiers of sound transducer as well as data bank watch functions. (3) A small size dynamic type sound transducer (φ=10.4 mm, t=4.0 mm) is characterized by lower resonance frequency (f_0). In this paper, these features are described.
- 社団法人日本時計学会の論文
- 1988-12-20