Synchronous envelope detector
CA 1197904 A · Owner: Kahn, Leonard R. · Inventors: Kahn, Leonard R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1092.01 SYNCHRONOUS ENVELOPE DETECTOR, ?O:rs ABSTRACT, An envelope detector for an amplitude and phase modulated carrier includes in-phase and quadrature-phase product demodulators whose outputs are passed through low pass filters separately. These separate filtered outputs are then squared and summed. The square root of the resulting sum signal is taken to produce the desired output signal whose amplitude is proportional to the envelope of the composite modulated carrier. -1-
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 December 10, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 10, 2002.
- 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.