Envelope amplifier
CA 1286734 C · Owner: Hughes Aircraft Company · Inventors: Hudspeth, Thomas; Kaplan, David S.; Rosen, Harold A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A high efficiency envelope amplifier (20) is disclosed, The invention includes a power supply (24) a, comparator (60), and several switches (26-38). The power supply (24) is capable of providing multiple outputs. The comparator (60) measures the amplitude of an input signal against one of several threshold levels. When the input signal is within a predetermined range a selected, power supply output is switched onto the output path. Since the present invention incrementally switches small amounts of power, switching losses are substantially mitigated.
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
- Granted July 23, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 23, 2008.
- 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.