Switching device and related operating method
US7738269B2 · kind B2 · utility
1Cited by
8References
19Claims
0Family size
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Key dates
| Filing date | Apr 3, 2006 |
| Grant date | Jun 15, 2010 |
| Priority date | — |
| Expiry date | Mar 14, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K7/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.