Low offset voltage unity gain buffer amplifier
CA 2064764 C · Owner: Jost, Steven R. · Inventors: Jost, Steven R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A buffer amplifier configuration simultaneously reduces d.c. voltage offsets through the signal flow path between its input (20) and output (50) and maintains a high input impedance and a low output impedance. In a preferred embodiment, high impedence is achieved by coupling the input transistor (201) collector (204) to a high impedance current source (210) which is , coupled to one of the buffer's power supply rails (22). The emitter (206) of the input transistor (201) is coupled to the input terminal (20) and its base (202) to the base (212) of a like polarity bipolar output transistor (211), the emitter (216) of which is coupled to an output terminal (50) and the collector (214) of …
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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 June 18, 1991 and granted May 15, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 18, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 18, 2013.
- 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.