Enhanced line powered amplifier
US4961218A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 17, 1989 |
| Grant date | Oct 2, 1990 |
| Priority date | — |
| Expiry date | May 17, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/44
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An enhanced amplifier for interconnecting a two-wire, bidirectional cable side transmission path and a two-wire bidirectional equipment side transmission path in a communication system includes a first hybrid splitter and a second hybrid splitter. The first hybrid splitter is formed of a cable-to-equipment voltage sense amplifier, a shunt current driver, and a series current compensator for generating a first simulated terminating impedance. The second splitter is formed of an equipment-to-cable voltage sense amplifier, the shunt current driver and the series current compensator for generating a second simulated terminating impedance. Other features disclosed include automatic gain adjustment circuitry for automatically setting the gain in gain/equalizer circuits to a fixed level. Further, auto-balancing circuitry is provided for adjusting automatically and continuously both equipment and cable side balance networks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.