Compact cable balance network for echo-cancelling, and method for optimizing transhybrid loss and method and apparatus for circuit simulation
US6757383B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 29, 1998 |
| Grant date | Jun 29, 2004 |
| Priority date | — |
| Expiry date | Dec 29, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/03
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A cable balance network for use in a full-duplex telecommunication system and method for optimizing the transhybrid loss of a full-duplex to half-duplex conversion circuit, said cable balance network comprising: (a) a plurality n of resistors Rn, each of said resistors Rn having a fixed resistance value dependent upon the impedance seen by the full-duplex port, and each of said resistors Rn, having a positive node and a negative node; (b) a plurality n−1 of capacitors Cn−1, each of said capacitors Cn−1 having a fixed capacitance value dependent upon the impedance seen by said full-duplex port, and each of said capacitors Cn−1 having a positive node and a negative node; and (c) a circuit configuration comprising at least two of said resistors R1, and R2 (n≧2) and at least one of said capacitors C1, such that all the negative nodes of each of said resistors Rn are effectively connected together, and such that the capacitor Cn−1is connected between the positive nodes of resistors Rn and Rn−1 for all values of n; the combination being constructed and arranged such that said circuit configuration, resistance values, and capacitance values define an…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.