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:
Feb. 04, 2020
Filed:
Apr. 27, 2018
Socionext Inc., Kanagawa, JP;
Atsushi Matsuda, Yokohama, JP;
SOCIONEXT INC., Kanagawa, JP;
Abstract
A first tuning circuit tunes an oscillation frequency by changing, based on a first control signal, capacitance values of variable capacitive elements connected in parallel to an inductor. A second tuning circuit switches capacitive elements in and out of parallel connection with the inductor by turning on and off a transistor based on a second control signal, to thereby tune the oscillation frequency. A switching circuit includes n-channel transistors whose drains are connected via resistor elements to the source or drain of the transistor and a power and whose sources are grounded, and changes a bias voltage of the second tuning circuit by turning on and off the n-channel transistors based on the second control signal.