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. 19, 2016
Filed:
Dec. 16, 2014
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
An oscillator includes a transformer, a first capacitor, a first transistor, a depletion or native second transistor, and a current control circuit. The transformer includes a primary winding configured to receive an input voltage and a secondary winding configured to boost the input voltage to generate an output voltage. The first capacitor is configured to form an LC resonant circuit together with the secondary winding to cause oscillation operation, the first transistor is connected in series with the primary winding, and the output voltage is applied to a control terminal of the first transistor. The depletion or native second transistor is connected in series with the primary winding and the first transistor, and the current control circuit is configured to adjust a control voltage applied to a control terminal of the second transistor to control a current flowing through the first winding.