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:
Jan. 27, 2009
Filed:
Aug. 24, 2005
Applicants:
Tomonori Tanoue, Machida, JP;
Masami Ohnishi, Hachioji, JP;
Inventors:
Tomonori Tanoue, Machida, JP;
Masami Ohnishi, Hachioji, JP;
Assignee:
Renesas Technology Corp., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03F 3/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention provides a wide-band, low-noise, and small-sized high frequency power amplifier that has small temperature dependence of the gain and is excellent in input matching. A parallel circuit consisting of a resistor whose resistance depends strongly on temperature and a conventional resistor is inserted serially into a signal path in an input matching circuit of an amplification unit, and resistances of the resistors are set to appropriate values, for example, about 2/3 times an input impedance of the amplification unit.