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:
Jun. 11, 1996
Filed:
Oct. 27, 1994
David A Fishman, Lakewood, NJ (US);
AT&T Corp., Murray Hill, NJ (US);
Abstract
A power supply for a portable telephone, includes a battery pack comprised of at least one battery cell providing an unregulated output voltage; a boost/buck switcher connected with the battery pack for boosting/bucking the output voltage to a different level; a first regulator connected with the boost/buck switcher for regulating the boosted/bucked output voltage to produce a first regulated voltage; a second regulator connected with the boost/buck switcher for regulating the boosted/bucked output voltage to produce a second regulated voltage having a voltage value different from the first regulated voltage; an EMI shielded case surrounding the battery pack, the boost/buck switcher, the first regulator and the second regulator; a first output terminal connected to the battery pack and supplied with the output voltage; a second output terminal connected with the first regulator and supplied with the first regulated voltage from the first regulator; and a second output terminal connected with the second regulator and supplied with the second regulated voltage from the second regulator.