Apparatus and method for demodulating multi-level signal
CA 2207818 C · Owner: Sato, Satoshi · Inventors: Imamura, Takeshi; Sato, Satoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multi-level signal demodulation apparatus includes an A/D converter for converting an input analog signal of which the amplitude is modulated by a multi-level to a digital signal, a memory for storing the digital signal a threshold, generator for calculating plural threshold levels in accordance with the digital signal which is stored in the memory, and a demodulator for demodulating the digital signal which is obtained by the A/D converter in accordance with the plural threshold levels to a signal according to a level of the digital signal.
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
- Filed October 29, 1996 and granted October 10, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 29, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 29, 2018.
- 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.