High dynamic range closed loop automatic gain control circuit
CA 2093638 C · Owner: Qualcomm Incorporated · Inventors: Wheatley, Charles E. Iii; Punch, Derek N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A closed loop automatic gain control (AGC) circuit with high dynamic range capabilities having an amplifier circuit (18) for receiving an input signal, which is susceptible to variations in signal power, and a control signal. The amplifier circuit (18) is responsive to the control signal for amplifying the input signal at a gain level corresponding to the control signal so as to provide a corresponding output signal. A measurement circuit (20) is coupled to the amplifier means (18) for measuring logarithmic signal power of the amplified input signal and providing a corresponding linear measurement signal. An integration circuit (22) is included for receiving the measurement signal and …
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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 November 27, 1991 and granted January 22, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 27, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 27, 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.