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. 07, 2017
Filed:
Feb. 05, 2016
Applicant:
Socionext Inc., Kanagawa, JP;
Inventors:
Assignee:
SOCIONEXT INC., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/04 (2006.01); H01P 7/00 (2006.01); H03F 1/02 (2006.01); H03F 3/191 (2006.01); H03H 5/00 (2006.01); H03J 5/02 (2006.01); H03F 1/32 (2006.01); H03F 3/45 (2006.01); H03F 3/193 (2006.01); H03H 11/04 (2006.01);
U.S. Cl.
CPC ...
H03F 1/0205 (2013.01); H03F 1/3211 (2013.01); H03F 3/191 (2013.01); H03F 3/193 (2013.01); H03F 3/45179 (2013.01); H03F 3/45475 (2013.01); H03H 5/00 (2013.01); H03J 5/02 (2013.01); H03F 2200/294 (2013.01); H03F 2200/451 (2013.01); H03F 2203/45394 (2013.01); H03F 2203/45631 (2013.01); H03F 2203/45634 (2013.01); H03F 2203/45638 (2013.01); H03F 2203/45644 (2013.01); H03F 2203/45658 (2013.01); H03F 2203/45688 (2013.01); H03F 2203/45694 (2013.01); H03F 2203/45696 (2013.01); H03F 2203/45712 (2013.01); H03F 2203/45714 (2013.01); H03F 2203/45718 (2013.01); H03F 2203/45726 (2013.01); H03H 11/04 (2013.01); H03J 2200/10 (2013.01);
Abstract
A parallel resonant circuit with excellent distortion and saturation characteristics is provided at low power consumption. A first power-supply voltage is applied to the parallel resonant circuit. In the parallel resonant circuit, a variable resistor includes one or more parallel-connected branches. Each of the branches includes a series circuit of a resistor and a MOS switch. A second power supply supplies power of control signals applied to respective gates of the MOS switches, and supplies back gate voltages to the MOS switches. A power-supply voltage of the second power supply is higher than the first power-supply voltage.