Electronic overcurrent protection of a DC data transmission circuit
US3936700A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 4, 1974 |
| Grant date | Feb 3, 1976 |
| Priority date | — |
| Expiry date | Dec 4, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/08
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An overcurrent-protection network for a transmission line logic system is disclosed, including a line switch in said line subject to over-current conditions and an added threshold-responsive logic element whose output in response to detection of over-current conditions triggers said protected logic elements to open said line switch via a over-current condition responsive gate whose output supplies a control signal to the line switch. A supplementary network is provided to reclose said switch; this may comprise a time-delay mechanism for resetting a bi-stable element whose output controls said switch after a reasonable interval. Alternatively, the supplementary network may comprise a resistor bridging the switch to maintain minimal current flow to said protected logic elements, which thereby are responsive to the next succeeding change in line current or signal, to change state and re-close said line switch, thereby restoring initial conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.