Patent 8374561 was granted and assigned to Hrl Laboratories, Llc on February, 2013 by the United States Patent and Trademark Office.
A non-Foster impedance power amplifier has a current amplifying device coupled in either an emitter-follower or source-follower configuration with a reactive load such as an antenna load. A negative impedance circuit is provided upstream of a gate or base or other control element of said current amplifying device.