Linear gain control amplifier
CA 2094133 C · Owner: Qualcomm Incorporated · Inventors: Wheatley, Charles E. Iii
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An amplification circuit having a compensation circuit (10) for receiving a control signal and generating a corresponding compensation signal according to predetermined compensation characteristics. An input amplification circuit (12) is provided for, receiving an input signal and the compensation signal amplifying the , input signal at an input gain level determined by the compensation signal and providing a corresponding input amplification circuit output signal. A filter element (14) receives and filters unwanted frequency components from the input amplification circuit output signal. An output amplification circuit (16) is provided for receiving the filtered input amplification …
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 October 15, 1991 and granted January 11, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 15, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 15, 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.