Power control circuit for a line driver
US6211719A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 19, 1999 |
| Grant date | Apr 3, 2001 |
| Priority date | — |
| Expiry date | Apr 19, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0272
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention is generally directed to a power control circuit for a line driver circuit in a central office. In a broad sense, the present invention operates to power-down line driver circuitry when it is not in use, and apply power to the line driver circuitry when transmissions are requested by a customer (e.g., customer premises). This reduces the power consumption of the line driver by eliminating the quiescent current draw when the line driver is idle. Recognizing that the typical line driver is in an idle state the vast majority of the time, compounded by the vast number of line drivers that exist within a central office environment, it will be appreciated that the overall power savings may be tremendous. In accordance with one aspect of the invention a circuit is provided for controllably applying power to a line driver. The circuit includes an isolation circuit disposed to receive a power control signal, the isolation circuit configured to generate a pair of output signals that are electrically isolated from the power control signal, each of the output signals having a state that is determined by the power control signal. The circuit also includes a power applicati…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.