Modem having a digital high voltage isolation barrier
US6351530B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 1998 |
| Grant date | Feb 26, 2002 |
| Priority date | — |
| Expiry date | Nov 16, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S20/20
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A modem utilizing a data access arrangement (DAA) having line side circuitry including a telephone network interface and system side circuitry including a host system interface. The line side circuitry and the system side circuitry are separated by a high voltage isolation barrier. In accordance with the invention, the high voltage isolation barrier and other DAA circuitry are configured such that information may be communicated between the system side circuitry and the line side circuitry in a digital format. In one embodiment of the invention, the high voltage isolation barrier comprises a single capacitor for communicating bidirectional digital data. In another embodiment of the invention, a pair of capacitors are provided in the high voltage isolation barrier, with the digital signals being driven is a differential manner. In yet another embodiment of the invention, a transformer is utilized for supplying clock signals and power across the high voltage isolation barrier, while a pair of capacitors (or a second transformer) is utilized to communicate bidirectional data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.