Devices and methods of cancelling the switching noise from power management integrated circuits
US9991780B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 2015 |
| Grant date | Jun 5, 2018 |
| Priority date | — |
| Expiry date | Jun 10, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/1584
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power management device includes a first power unit, a second power unit, and a control unit. The first power unit receives a first control signal of a first phase to generate a first current of the first phase flowing to an output node. The second power unit receives a second control signal of a second phase to generate a second current of the second phase flowing to the output node. A phase delay is the difference between the first phase and the second phase. The control unit receives a clock signal in a clock frequency to generate the first control signal and the second control signal. The control unit controls the phase delay to cancel a corresponding harmonic of the clock frequency at the output node.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.