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:
Oct. 27, 2009
Filed:
Dec. 10, 2007
Masakatsu Maeda, Kyoto, JP;
Masakatsu Maeda, Kyoto, JP;
Panasonic Corporation, Osaka, JP;
Abstract
Transistors Mand Mare cross-coupled to each other so as to form a negative resistance circuit. First and second variable capacitor sectionsandare connected in parallel with an inductor circuit so as to form a parallel resonant circuit. A first reference voltage Vrefand a control voltage VTcorresponding to a carrier wave component are fed to both terminals, respectively, of each of variable capacitors VCand VCincluded in the first variable capacitor sectionA second reference voltage Vrefand a control voltage VTcorresponding to a modulated wave component are fed to both terminals, respectively, of each of variable capacitors VCand VCincluded in the second variable capacitor sectionA DC control sectionincludes a resistance Rinterposed between the second reference voltage Vrefand a common connection point of resistances Rand Rand a capacitor Cfor feeding only an AC component included in the modulated wave component to the common connection point of the resistances Rand RThus, a DC voltage, on which the AC component included in the modulated wave component is superimposed, is changed from a certain DC bias to a DC bias of the second reference voltage Vref