High-voltage driver and piezoelectric pump with built-in driver
US7902720B2 · kind B2 · utility
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8Claims
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Key dates
| Filing date | Jul 2, 2008 |
| Grant date | Mar 8, 2011 |
| Priority date | — |
| Expiry date | Sep 3, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B43/046
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A digital waveform generating circuit having a DC voltage as an input and generating a sinusoidal digital signal, an active filter extracting low-frequency components from the sinusoidal digital signal generated in the digital waveform generating circuit, and a high-voltage control circuit generating a high-voltage drive signal using the sinusoidal digital signal after passing through the active filter are provided. A smooth waveform without steep voltage changes is generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.