Differential echo cancellation receiver with dynamic cancellation of excess DC output current
US6973182B1 · kind B1 · utility
4Cited by
1References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 10, 2003 |
| Grant date | Dec 6, 2005 |
| Priority date | — |
| Expiry date | May 23, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2203/5483
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Differential echo cancellation receiver circuitry with dynamic cancellation of excess DC output current. Differential input circuitry provides for cancellation of incoming DC voltage and the incoming transmit signal echo while passing the receive signal. Excess DC current appearing in the input circuitry as part of the incoming DC voltage and echo signal cancellation is shunted away from the output circuitry with dynamically biased current shunting circuitry that tracks changes in the DC current within the input circuitry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.