Invention Grant
US07515672B2 Digital access arrangement circuitry and method for connecting to phone lines having a DC holding circuit with programmable current limiting
失效
用于连接到具有可编程限流的DC保持电路的电话线路的数字接入配置电路和方法
- Patent Title: Digital access arrangement circuitry and method for connecting to phone lines having a DC holding circuit with programmable current limiting
- Patent Title (中): 用于连接到具有可编程限流的DC保持电路的电话线路的数字接入配置电路和方法
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Application No.: US10679013Application Date: 2003-10-03
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Publication No.: US07515672B2Publication Date: 2009-04-07
- Inventor: Timothy J. Dupuis , George Tyson Tuttle , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
- Applicant: Timothy J. Dupuis , George Tyson Tuttle , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
- Applicant Address: US TX Austin
- Assignee: Silicon Laboratories Inc.
- Current Assignee: Silicon Laboratories Inc.
- Current Assignee Address: US TX Austin
- Agency: O'Keefe, Egan, Peterman & Enders LLP
- Main IPC: H04L23/00
- IPC: H04L23/00

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.
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