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. 11, 2000
Filed:
Jun. 16, 1997
Thomas Meier, Munchen, DE;
Klaus-Jurgen Schoepf, Ismaning, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A circuit configuration for producing an output voltage having a first polarity with respect to a reference potential, in a mobile radio transceiver supplied with an operating voltage having a second polarity with respect to the reference potential, includes a circuit input terminal for a ringing signal generator supply voltage. A preferred embodiment operates according to a fundamental functional principle of charging a first capacitor to a positive voltage with respect to the fixed reference potential through the use of a voltage overshoot at a coil after the latter has been deenergized. During an on phase of a transistor, the first capacitor charges a second capacitor to a negative voltage with respect to the fixed reference potential. The negative voltage can be picked off externally.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile