The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 11, 2007
Filed:
Jan. 19, 2005
Mark Kintis, Manhattan Beach, CA (US);
Mark Kintis, Manhattan Beach, CA (US);
Northrop Grumman Corporation, Los Angeles, CA (US);
Abstract
A power amplifier circuit () that includes an error correction loop () having a lower IP3 error correction amplifier () than a main power amplifier () in a main signal path (). A first attenuator () in the error loop () attenuates the RF signal, and provides more attenuation of intermodulation products in the RF signal and about the same attenuation for a main frequency of the RF signal for each dB of attenuation. The error amplifier () amplifies the attenuated RF signal from the first attenuator (). A second attenuator () in the error loop () attenuates the RF signal from the error correction amplifier (). A phase shifter () phase shifts the RF signal from the second attenuator (). A coupler () couples the amplified RF signal and the phase shifted RF signal to cancel out intermodulation products in the amplified RF signal.