Receiver for simultaneously transmitted clock and auxiliary signals
US4276645A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 1979 |
| Grant date | Jun 30, 1981 |
| Priority date | — |
| Expiry date | May 25, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0083
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A receiver for simultaneously transmitted clock signals of frequency F (HC) and auxiliary signals of frequency f (HS), F=kf, k=2, 3, 4, . . . , said clock and auxiliary signals being transmitted as a modified clock signal (HM) wherein one clock pulse is omitted every k clock pulses. The modified clock signal is simultaneously transmitted over three, nominally identical, transmission circuits (e.g. as HM1, HM2, & HM3). The receiver comprises the combination of a selection circuit (1) for generating a normal modified clock signal (H), even if one of the three received modified clock signals should be absent, and a signal separation circuit (2) for reconstituting both the clock signals (HC) and the auxiliary signals (HS). The receiver further includes an alarm circuit promptly detects transmission failures or impairments, even though the main portion of the circuit continues to operate properly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.