Digital signal transmitter and receiver using source based reference logic levels
CA 2289357 A1 · Owner: Northern Telecom Limited · Inventors: Crick, William R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A signal transmitter for transmitting digital logic signals and a complementary receiver, are disclosed. The signal transmitter comprises a plurality of signal drivers and at least one reference driver. The signal drivers transmit digital signals, while the reference driver transmits a constant signal representative of a digital HI or LO. The signal and reference drivers are interconnected so that any noise due to package and power supply interconnection impedances is present in all transmitted signals including any reference signals. At a receiver, the reference signal including noise is used to establish threshold levels for digital HI and LO signals. Because noise is common to all …
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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
- Filed November 10, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 10, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 10, 2021.
- 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
Timeline From CIPO dates
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.