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. 29, 1998
Filed:
Apr. 30, 1997
Sadayoshi Yoshida, Tokyo, JP;
Kazunari Sato, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A variable frequency microwave oscillator comprises an oscillation FET of a junction type, a fixed impedance block connected to the source of the oscillation FET for determining the drain impedance on the source of the oscillation FET, and a variable bias block including inductance connected to the drain of the oscillation FET and an impedance controlling junction FET both for determining the drain impedance of the oscillation FET of a junction type. The gate of the oscillation FET is connected to an external resonance block which generates an oscillation in association with the negative impedance appearing on the gate of the oscillation FET. The oscillation frequency is controlled by a control voltage applied to the gate of the impedance controlling FET.