Non-recursive half-band filter
CA 1292287 C · Owner: Ant Nachrichtentechnik G.M.B.H. · Inventors: Gockler, Heinz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a non-recursive half-band filter and permits the conversion of a complex input signal into a complex output signal in that its pulse response is modulated onto the complex carrier with a frequency of 1/4 or 3/4 the sampling frequency and whereby the zero phase of this frequency is an integral multiple of .pi./2 and whereby the, sampling rate is retained.
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 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 19, 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.