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. 12, 2017
Filed:
Jun. 20, 2016
Renesas Electronics Corporation, Tokyo, JP;
Masakazu Mizokami, Tokyo, JP;
RENESAS ELECTRONICS CORPORATION, Tokyo, JP;
Abstract
The present invention aims to provide a digital variable capacitance circuit, a resonant circuit, an amplification circuit, and a transmitter having a high performance. A digital variable capacitance circuitaccording to this embodiment is a digital variable capacitance circuit including a plurality of unit capacity cells-to-connected in parallel between two output terminals OUTP and OUTN, in which the unit capacity cellcomprises: a first capacitor Cuhaving one end connected to one output terminal OUTP; a second capacitor Cuthat is connected in series with the first capacitor Cubetween the two output terminals; and an NMOS transistor Mthat is connected in parallel with the second capacitor Cuand is controlled in accordance with a digital control signal.