Signal receiver
CA 2022876 C · Owner: Aihara, Shuichi · Inventors: Aihara, Shuichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a signal receiver which amplifies and compares a digital input signal with a threshold value for level decision, the digital input signal is applied to the one input terminal of a summing amplifier, the level of the summed output is compared with the threshold value for level-deciding the input signal and the peak level of the summed output is held by a peak hold circuit. The difference between the peak level held by the peak hold circuit and a reference voltage is amplified by a differential amplifier and is then applied to the other input terminal of the summing amplifier and its summed, output is clamped to the reference voltage thereby, preventing an error in deciding a low-level …
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 August 8, 1990 and granted August 2, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 8, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 8, 2012.
- 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.