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Patent Searching and Data


Title:
センサ機能付携帯機器
Document Type and Number:
Japanese Patent JP3546887
Kind Code:
B2
Abstract:
A small-sized portable device which has a sensor function of detecting and displaying physical information and whose resolution and reproducibility of A/D conversion are ensured by using only one low cost 1.5V button type silver cell. The portable device is provided with the silver cell used as a low-voltage power source and a boosting power source circuit which boots the low voltage of the silver cell to a high voltage. A sensor driving circuit is driven directly by the low voltage of the cell, and an amplifier circuit and an A/D conversion circuit are driven by the high voltage boosted by the boosting power source circuit. Sensor signals can be processed by using the 1.5V button type silver cell without impairing the existing functions because the boosting power source circuit is provided. The degree of freedom in designing the portable device is increased and the cost of the device is reduced because the device can is light and compact.

Inventors:
Kazuya Mitaki
Application Number:
JP52224895A
Publication Date:
July 28, 2004
Filing Date:
February 10, 1995
Export Citation:
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Assignee:
CITIZEN WATCH CO.,LTD.
International Classes:
G04G99/00; (IPC1-7): G04G1/00; G04C10/00
Domestic Patent References:
JP1259220A
JP57012383A
JP56125683A
JP57006384A
JP53003864A
JP54087260A
Attorney, Agent or Firm:
Hiroo Suzuki