PORTABLE CLOCK AND ELECTRONIC DEVICE

WIPO Patent Application WO/2007/011024

A1

A portable clock is provided with an atomic oscillator (13) for generating and outputting a reference clock signal; and a clock module (12) which operates based on the reference clock signal. The atomic oscillator (13) and the clock module (12) are separately arranged to be thermally isolated. An electronic device is provided with a crystal oscillator for generating and outputting a first oscillation signal; an atomic oscillator for generating and outputting a second oscillation signal which is more accurate than the first oscillation signal; a clock module which operates based on the first oscillation signal and the second oscillation signal; and a thermally isolating section for thermally isolating an atomic oscillator, the crystal oscillator (11) and the clock module (12). Thus, the portable clock and the electronic device wherein influence of heat from the atomic oscillator is reduced and power consumption can be reduced, even when the atomic oscillator is used as a reference oscillator, are constituted.

JP11326559	TIMER CIRCUIT
JP61088181	ELECTRONIC TIME PIECE
JP11084031	OSCILLATOR, CRYSTAL TIMEPIECE, AND MANUFACTURE OF THE OSCILLATOR

AGESAWA, Kazunari (3-5 Owa 3-chome, Suwa-sh, Nagano 02, 3928502, JP)
上沢 和成 (〒02 長野県諏訪市大和三丁目３番５号 セイコーエプソン株式会社内 Nagano, 3928502, JP)

JP2006/314480

January 25, 2007

July 21, 2006

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SEIKO EPSON CORPORATION (4-1 Nishishinjuku 2-chome, Shinjuku-ku Tokyo, 11, 1630811, JP)
セイコーエプソン株式会社 (〒11 東京都新宿区西新宿二丁目４番１号 Tokyo, 1630811, JP)
AGESAWA, Kazunari (3-5 Owa 3-chome, Suwa-sh, Nagano 02, 3928502, JP)

G04G3/00; G04F5/14

KUSHIBUCHI, Masayuki et al. (Sonic-City Bldg. 18F, 1-7-5 Sakuragi-cho, Omiya-k, Saitama-shi Saitama, 330-8669, JP)

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