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:
Dec. 13, 2005
Filed:
May. 05, 2003
Jeffrey W. Scott, Austin, TX (US);
Navdeep S. Sooch, Austin, TX (US);
David R. Welland, Austin, TX (US);
Jerrell P. Hein, Driftwood, TX (US);
Andrew W. Krone, Austin, TX (US);
Jeffrey W. Scott, Austin, TX (US);
Navdeep S. Sooch, Austin, TX (US);
David R. Welland, Austin, TX (US);
Jerrell P. Hein, Driftwood, TX (US);
Andrew W. Krone, Austin, TX (US);
Silicon Laboratories Inc., Austin, TX (US);
Abstract
A communication system is provided which draws virtually no loop current during a ringing burst and only draws on-hook loop current during the caller ID field. More particularly, ringer burst circuitry may be powered from the user powered circuitry by the transmission of power across the isolation barrier rather than being powered from the phone line. Thus, loop current need not be drawn from the TIP/RING lines during ringer bursts. The isolation barrier may be a capacitive isolation barrier which allows bidirectional communication and extraction of power from signals transmitted across the barrier.