ALEXANDRIA, Va., June 19 -- United States Patent no. 12,334,871, issued on June 17, was assigned to Telefonaktiebolaget LM Ericsson (publ) (Stockholm).
"Feedforward amplifier" was invented by Richard Hellberg (Huddinge, Sweden).
According to the abstract* released by the U.S. Patent & Trademark Office: "A feedforward amplifier comprises a power amplifier that generates an amplified signal, an error correcting circuitry that generates a first error signal and a second error signal based on an error in the amplified signal; and an output circuitry. The output circuitry comprises: a first quadrature coupler, an output of a first error amplifier is connected to the quadrature coupler and an input of the first error amplifier is configured to ...