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:
Apr. 07, 2009
Filed:
Oct. 03, 2003
Timothy J. Dupuis, Austin, TX (US);
George Tyson Tuttle, Austin, TX (US);
Jeffrey W. Scott, Austin, TX (US);
Navdeep S. Sooch, Austin, TX (US);
David R. Welland, Austin, TX (US);
Timothy J. Dupuis, Austin, TX (US);
George Tyson Tuttle, Austin, TX (US);
Jeffrey W. Scott, Austin, TX (US);
Navdeep S. Sooch, Austin, TX (US);
David R. Welland, Austin, TX (US);
Silicon Laboratories Inc., Austin, TX (US);
Abstract
A digital direct access arrangement (DAA) circuitry may be used to terminate the telephone connections at the user's end that provides a communication path for signals to and from the phone lines. Briefly described, the DAA provides a programmable circuit for the DC termination for a variety of international phone standards. The invention may also be utilized with circuitry for transmitting and receiving a signal across a capacitive isolation barrier. More particularly, a DC holding circuit is provided in which a programmable DC current limiting mode is available. In the current limiting mode, power may be dissipated in devices external to a DAA integrated circuit. Moreover, much of the power may be dissipated in external passive devices, such as resistors.