Integrated modem and line-isolation circuitry and associated method powering caller ID circuitry with power provided across an isolation barrier
US6724891B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2000 |
| Grant date | Apr 20, 2004 |
| Priority date | — |
| Expiry date | May 17, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/033
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An improved modem architecture and associated method are disclosed that integrate modem and line-isolation circuitry so as to achieve modem functionality and system-side isolation functionality on a single integrated circuit. The combined modem and line isolation system includes a line-side line-isolation integrated circuit which contains caller ID circuitry. The caller ID circuitry includes a caller ID analog to digital converter for processing caller ID data. The caller ID analog to digital converter may be powered by a power supply generated from power provided across a capacitive isolation barrier. The caller ID circuitry may be coupled to the ringer inputs of the line-side line-isolation integrated circuit. The ringer inputs may be capacitively coupled to the phone line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.