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:
May. 02, 1995
Filed:
Aug. 09, 1993
Morio Yoshimatsu, Kanagawa, JP;
Sony Corporation, , JP;
Abstract
A residual capacity indicating device for indicating the residual capacity of a battery, the discharge voltage of which decreases when the same is discharged and the capacity of which increases with the increase of its temperature, comprises differential amplifiers for comparing the output voltage of the battery with reference voltages. LEDs are driven by the outputs of the differential amplifiers, respectively, according to the residual capacity of the battery to indicate the residual capacity of the battery. The reference voltages are determined by a combination of a Zener diode and a pair of resistors connected to each of the inverting terminals of the differential amplifiers. Since the Zener diode has a temperature characteristic opposite that of the resistors, the residual capacity of the battery can correctly be indicated regardless of the variation of the temperature of the battery.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile