Cascode mirror video amplifier
CA 2016286 C · Owner: Electrohome Limited · Inventors: Desjardins, Francois
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cascode mirror video amplifier for generating equal amplitude and opposite phase signals for driving a cathode and control grid of a cathode ray tube. The video amplifier comprises a pair of common base amplifiers connected via equal valued resistances to a pair of opposite polarity power sources. A common emitter amplifier is connected intermediate the pair of cascaded common base amplifiers and functions as a voltage control current source for receiving an input signal and in response generating a common current signal within each of the pair of common base amplifiers such that equal amplitude and opposite phase voltage signals are generated across the respective resistances. A pair of …
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 May 8, 1990 and granted February 10, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 8, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 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.
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.