Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Keiji Shigeoka0
Koji Kawasaki0
Shinya Goto0
Date of Patent
June 15, 2010
0Patent Application Number
113953410
Date Filed
April 3, 2006
0Patent Primary Examiner
Patent abstract
A switching device 30 and a related operating method are disclosed for generate a train of drive pulses under a basic pattern for a repetition cycle time T. The train of drive pulses has leading edges shifted from basic time periods T1 by shift amounts Φ0 to Φ02, respectively, which are different from each other, whereby switching frequencies, occurring based on the leading edges of the drive pulses, are spread. A spread frequency, which is a inverse number of the cycle time T of the basic pattern, is set to be higher than an audible frequency.
Timeline
No Timeline data yet.
Further Resources
No Further Resources data yet.
