Digital fm squelch detector
CA 1292517 C · Owner: Motorola, Inc. · Inventors: Yester, Francis R. Jr.; Jasper, Steven C.; Johnson, Mark J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A method is disclosed for determining when a frequencymodulated expected information signal resides at a predetermined channel. The method is based on determining a value based on the frequency deviation of the received signal and then comparing the value, with a threshold based on the expected information signal. The method is particularly well-suited for use as a squelch detector in digital FM radios.
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 November 26, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 26, 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.