Hybrid integrated impedance converter circuit
CA 1105100 A · Owner: Hitachi, Ltd. · Inventors: Suzuki, Toshiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to impedance converter circuits for use in filters etc. The circuit of the invention has input and earth terminals, several impedance elements connected in series between the terminals and a pair of, operational amplifiers having output terminals inverting, input terminals and non-inverting input terminals these, terminals being coupled to the impedance elements. A negative feedback capacitor is connected between the output and inverting input terminals of at least one of the amplifiers. The capacitor has a capacitance value which stabilizes the operation of the converter circuit which is otherwise susceptible to instability due to the occurrence of stray capacitances. …
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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
- Granted July 14, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 14, 1998.
- 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.