The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 07, 1995
Filed:
Jul. 17, 1992
Yasumi Imagawa, Kanazawa, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An apparatus using a battery as a power source requires a battery having an extended life time. A burden upon a battery can be reduced by operating the inner circuit at a low voltage and current. The present invention aims at providing a compact and low power consuming apparatus. A battery used as a power source drives a circuit for a low voltage circuit system and a switching circuit which switches power supply when the battery voltage becomes a preset voltage. A circuit for a high voltage circuit is directly driven by the battery when the battery voltage is high, and the circuit is powered from the output (for example, 1.5 volts) of a step-up circuit when the battery voltage is low. Switching of power sources is made in such a manner, resulting in low power consumption. Extension of life time of battery, and reduction in size of battery and apparatus can be achieved.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile