Switching arrangement for receiving DC signals
US3978283A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 15, 1975 |
| Grant date | Aug 31, 1976 |
| Priority date | — |
| Expiry date | Sep 15, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q1/36
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A circuit arrangement for facilitating reception of direct current signals in telegraph or data transmission systems is described. A threshold circuit is disposed in the receive line; the threshold circuit has two threshold values, one of which is close in current value to the cut-off of the signal element, and the other of which is close in current value to the signal level of a signal element. A timer is switched into the circuit by a signal provided over a logic circuit when a first threshold level is undershot in a descending signal transition and when a second threshold level is exceeded during an ascending signal transition. The timer emits a clock pulse to an output circuit, which has been primed by an input circuit, the operation of which are controlled by signals from the outputs of the threshold circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.