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:
Jan. 19, 1999
Filed:
Jul. 11, 1997
Asulab S.A., Bienne, CH;
Abstract
This invention provides protection against power supply failure, in particular of electronic circuits of timepieces powered by photovoltaic batteries. The invention comprises a continuous electric power supply comprising: an electrical continuous source (G) coupled to a power output (VDD, GND); energy storing means (6); and a reversible dc/dc electric converter (5) coupled both to the power output (VDD, GND) and to the energy storing means (6). The converter (5) comprises switching means (T1, T2, T3, T4) for modifying its configuration. The power supply storing means (6) comprise essentially a capacitor (C). Preferably, the reversible converter (5) is a dc/dc converter, the converter being a voltage multiplier in a first configuration and being a voltage divider in a second configuration.