Tv-if circuit
CA 1214544 A · Owner: N.V.Philips'Gloeilampenfabrieken · Inventors: Apeldoorn, Hans J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
TV-IF circuit". TV-IF circuit comprising a balanced video signal path (A5, M, A6, VM) arranged between an IF-input (1 1'), and a video signal output (2, 2') and a balanced sound signal path (A1, A2, A7, SM) arranged between the IF-input (1, 1') and a sound signal output (3, 3') these two paths, comprising a video mixing stage (VM) and a sound mixing stage (SM), respectively for a quasi-parallel sound signal processing or an intercarrier sound signal processing. The compatability between these two modes of sound signal processing increases the range of applications compared with prior art TV-IF circuits and this is accomplished by a matrix circuit (M) comprising a balanced non-inverting …
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 25, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 25, 2003.
- 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.