Demodulation circuit
CA 1284827 C · Owner: Nec Corporation · Inventors: Inoue, Taketoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The demodulation circuit includes a Schmitt trigger circuit, first and second monostable multivibrators, a quartz oscillator, first and second low-pass filters, and a comparator. The Schmitt trigger circuit converts a modulated signal modulated by data into a pulse signal. The first monostable multivibrator converts an output from the Schmitt trigger circuit into a PPM signal. The quartz oscillator oscillates at the same frequency as the center frequency of the modulated signal. The second monostable multivibrator is formed on the same chip as the first monostable multivibrator and responsive to an output signal from the quartz oscillator. The second monostable multivibrator generates a …
Read the whole patent
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 June 11, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 11, 2008.
- 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.