PCMCIA modem
US5809068A · kind A · utility
24Cited by
18References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 8, 1994 |
| Grant date | Sep 15, 1998 |
| Priority date | — |
| Expiry date | Sep 8, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M11/06
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A modem having reduced power dissipation and temperature compensation. The modem includes a data pump, a telephone line interface, memory and a controller, connected to the memory and the data pump, for executing program code to control transfers between the data pump and a telephone line. The telephone line interface includes a current-limited loop holding circuit in order to limit power dissipated in the modem due to DC loop current. The current-limited loop holding circuit includes a constant current source in series with a DC loop holding circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.