Integrated circuit card for computer communication
US6532280B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 27, 2000 |
| Grant date | Mar 11, 2003 |
| Priority date | — |
| Expiry date | Apr 27, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/2803
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An interface circuit for allowing a computer system to communicate over existing household wiring in multiple frequency bands. The interface circuit includes an isolation circuit that connects the interface circuit to the household wiring. An analog-to-digital/digital-to-analog converter receives analog signals in multiple frequency bands and digitizes them. A digital splitter/combiner operates to filter the combined frequency digital signals received from the analog-to-digital/digital-to-analog converter. The frequency bands preferably comprise a voice band typically used for transmitting voice telephone signals, a DSL band for transmitting and receiving high-speed digital data over a twisted pair of telephone wires, and a Home PNA frequency band used for networking computers and peripherals on a twisted pair of telephone wires. The digital splitter/combiner feeds circuits designed to transmit and receive data in each of these frequency bands so that the computer system can transmit and receive data on whatever band is available.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.