Low noise microwave amplifier having optimal stability, gain, and noise control
CA 1284360 C · Owner: Wong, Joseph S. · Inventors: Wong, Joseph S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gallium arsenide MESFET amplifier circuit employing a parallel feedback network (17) having first (18) and second (20) transmission line section filtering networks connected on either side of a series R-C-R circuit (R1, C, R2). In one optimized embodiment, the transmission line sections each include low and high impedances unequal in length to onequarter wavelength. The use of two discrete resistors together with the filtering networks to eliminate thermal noise generated by the resistors provides, optimum gain, low noise, and stable operation over a wide range of microwave frequencies.
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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 May 21, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 21, 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.