Offset correction circuit and dc amplification circuit
CA 2248337 C · Owner: Takatsu, Tatsuhiko · Inventors: Takatsu, Tatsuhiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An offset correction circuit containing an integrator is provided between output of a first DC amplifier and input of a second DC amplifier, and the integrator corrects not only an offset error caused by an input signal in the first DC amplifier, but also an offset error caused by an input signal in the second DC amplifier. Thus, the effect of the offset error proportional to the integral value of the input signal strength, occurring depending on the temperature stability or power supply voltage variation rate resulting from the input signal in the two DC amplifiers can be canceled.
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 September 22, 1998 and granted September 4, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 22, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 22, 2020.
- 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.