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:
Jul. 17, 2007
Filed:
Jul. 21, 2004
Masahiro Kumagawa, Katano, JP;
Toshifumi Nakatani, Sakai, JP;
Hisashi Adachi, Mino, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A high frequency variable gain amplification deviceincludes: a feedback circuitcapable of changing a feedback impedance to adjust the gain of an amplifierin accordance with a control signal from a control device; and a current consumption adjustment circuitcapable of adjusting current consumption of the amplifier. The control devicecontrols the feedback impedance and the current consumption based on a desired signal power level and an undesired signal power level. If the desired signal power level exceeds a predetermined value, the control devicereduces the feedback impedance to increase the amount of a feedback signal, thereby allowing the amplifierto operate with low gain so as to prevent the distortion characteristic from being reduced and to reduce the current consumption.