Voltage doubler circuit
US4549257A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 16, 1982 |
| Grant date | Oct 22, 1985 |
| Priority date | — |
| Expiry date | Sep 16, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A voltage doubler circuit for providing half-wave direct current at a predetermined peak voltage level to a device, has a source of alternating current having a peak voltage lower than the predetermined peak, a first capacitance element in series with the device, at least one additional capacitance element, switching means for selectably connecting the additional capacitance element in parallel with the first capacitance element for providing different levels of current to the device, and a resistance element connected between the capacitance elements for causing a voltage buildup on the additional capacitance element when the additional capacitance element is not connected by the switching means, whereby the peak voltage across the switch is smaller than the predetermined peak voltage level; and the internal charging resistor and two capacitance elements form an integral wound capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.