Power amplifier
CA 2261145 C · Owner: Dynamic Precision As · Inventors: Alexandersen, Rune Olaf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A power amplifier designed for delivering high power to a load (LOAD) comprises an input stage (A1) that converts an input voltage (u1) to a current signal (iin) which is applied to an end stage comprising a current amplifier stage (A3, PA1, PA2) and a bypass-resistor (R). The output terminal (7) of the current amplifier stage is connected to earth and the current supply (PS1, PS2) is arranged floating relative to signal earth so that the power current , signal through the load (LOAD) also passes through the current supply (PS1 or PS2). A correction amplifier (A2) is preferably connected so as to measure the voltage across the end stage (A3, PA1, PA2) and provide a correction current …
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 July 18, 1997 and granted September 17, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 18, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 18, 2019.
- 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.