Circuitry for derivations of clock signals from pulse-code-modulated transmissions
CA 1165021 A · Owner: Te Ka De Felten & Guilleaume Fernmeldeanlagen G.M.B.H. · Inventors: Kittel, Ludwig
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system is disclosed in which a differential phase-shift keyed, pulse-code-modulated transmission is itself delta-modulated in order to derive a transmission clock signal characteristic of -the transmission as opposed, to being characteristic of an underlying data signal which is used as a modulating waveform in the transmission. The delta-modulation detects changes in state of the data transmission, which changes in state can be monitored in order to derive the transmission clock signal utilized. In a preferred embodiment, a phase-locked loop may be utilized to produce a pulse train having the same frequency as and being in phase, with, such changes of state in the transmission. -1-
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted April 3, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 3, 2001.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.