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:
Apr. 05, 2005
Filed:
Nov. 15, 2001
Applicants:
Akira Ohta, Hyogo, JP;
Akira Inoue, Hyogo, JP;
Inventors:
Akira Ohta, Hyogo, JP;
Akira Inoue, Hyogo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F003/60 ;
U.S. Cl.
CPC ...
Abstract
A high-frequency amplifier in a power amplifier module includes, on a substrate on which the amplifier is formed, first- and second-stage amplifiers for receiving and amplifying an input signal, a harmonic processing circuit for matching of harmonics included in an output signal from the second-stage amplifier, and a low-pass filter receiving an output from the harmonic processing circuit to selectively pass a signal to be supplied to a non-reciprocal circuit element using a predetermined frequency as a cutoff frequency.