Low impedance buffer circuitry
CA 2016001 C · Owner: Khoury, John M. · Inventors: Khoury, John M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract A low impedance class AB buffer stage in complementary transistor technology has its quiescent current stabilized and its operation thereby made more reliable by means of suitable error op-amps that are supplied with transistor feedback loops which are connected to the stage's output terminal through resistors. In addition, for full rail-to-rail output voltage capability transistor switching devices, are added to turn off current through either of the resistors when the output voltage approaches the voltage of either power rail and also a pair of serially rail-to-rail connected transistors is connected in parallel with the feedback loops.
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 3, 1990 and granted July 26, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 3, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 3, 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.
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.