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. 01, 2019
Filed:
Jul. 21, 2017
Oracle International Corporation, Redwood City, CA (US);
Phillip Kwan, San Francisco, CA (US);
Xiaolei Li, Arlington, MA (US);
Frankie Y. Liu, Palo Alto, CA (US);
Ziad Shehadeh, Mountain View, CA (US);
Oracle International Corporation, Redwood Shores, CA (US);
Abstract
A voltage-controlled oscillator (VCO) having an LC tank circuit with a variable inductance is disclosed. In one embodiment, the VCO includes a capacitance, at least a portion of which is variable and responsive to a first tuning voltage. The VCO further includes a transformer having first (primary) and second (secondary) windings. The primary winding is coupled to the capacitance, and provides the inductance of the LC tank circuit. The secondary winding is coupled to a current control circuit. The current control circuit may vary the induced current through the secondary winding. By varying the induced current through the secondary winding, the effective inductance of the primary winding may also be varied. Accordingly, the VCO may be tuned by varying the inductance of the LC tank circuit, as well as by varying the capacitance of the same.