Amplitude compressing/expanding circuit
CA 1309665 C · Owner: Sato, Tomoko · Inventors: Sato, Tomoko; Akagiri, Kenzo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an amplitude compression and expansion circuit the amplitude compression, ratio for the output signal is switchable by controlling the gain of the amplitude modulating circuit based upon the signal level of the input signal or output signal from the amplitude modulating circuit. The amplitude compression and expansion circuit utilizes an adder circuit for outputting a difference signal between the input signal and output signal and a signal processing circuit for feeding out an output signal whose signal level varies with the difference signal, and is adapted to output a summation signal of the output signals from the amplitude modulating circuit and the signal processing circuit. This …
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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 November 3, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 3, 2009.
- 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.