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. 29, 2013
Filed:
Aug. 07, 2009
Yadunandan Nagarajaiah, Austin, TX (US);
Michel Darveau, Gatieneau, CA;
Eric Bass, Austin, TX (US);
Microsemi Semiconductor (U.S.) Inc., Austin, TX (US);
Abstract
A method for providing a ringing signal includes providing a plurality of batteries coupled to a subscriber line interface circuit operable to generate the ringing signal during a ringing cycle and switching selected batteries during the ringing cycle based on values of the ringing signal during the ringing cycle. A line card includes a subscriber line audio-processing circuit operable to generate values for a ringing signal during a ringing cycle, a subscriber line interface circuit coupled to the subscriber line audio-processing circuit and operable to drive the ringing signal on a subscriber line based on the generated values, a plurality of batteries coupled to a subscriber line interface circuit and a control unit operable to switch selected batteries during the ringing cycle based on the generated values of the ringing signal.