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:
Aug. 30, 2005
Filed:
Aug. 01, 2003
Yasuomi Tanaka, Hamakita, JP;
Masao Noro, Hamamatsu, JP;
Yasuomi Tanaka, Hamakita, JP;
Masao Noro, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu, JP;
Abstract
A complementary signal generating circuit () generates first complementary signals (SS) from a PWM signal. A signal converting circuit () converts the first complementary signals to second complementary signals (S, Sor S, S) having a voltage component based on a negative power supply (VPP−). Among the second-complementary signals, the signals (S, S) are supplied to a driving circuit (), and the signals (S, S) are supplied to a current driving circuit (). In response to the signals (S, S), the current driving circuit outputs third complementary signals (H, H) having a current component that is directed toward the negative power supply (VPP−), to a driving circuit (). As a result, the driving circuits () complementarily drive power-MOS transistors ().