Transceiver
US6870911B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 2001 |
| Grant date | Mar 22, 2005 |
| Priority date | — |
| Expiry date | Feb 22, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/0002
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Transceiver for transmitting and receiving voice and data signals includes a voice signal driver configured to operate in idle or working operating modes, during which it has a high or low output impedances respectively. A data signal driver drives an analog data transmission signal via a channel to the subscriber. A data reception circuit that converts a received analog data reception signal into digital reception data includes a multiplication circuit for multiplying the digital reception data by compensation coefficients selected to compensate for channel distortions, an identification circuit connected to the channel for providing an identification signal indicative of whether the subscriber terminal is on or off-hook, and a control circuit to select the operating mode in response to the identification signal and to determine compensation coefficients to compensate for a change in the channel resulting from a change in the output impedance of the voice signal driver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.