Circuitry for voltage pole reversal
US5999426A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1998 |
| Grant date | Dec 7, 1999 |
| Priority date | — |
| Expiry date | Dec 14, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M19/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit arrangement for producing an output voltage with a first polarity with respect to a reference-earth potential from an operating voltage with a second polarity with respect to the reference potential. The circuit arrangement operates on the basic principle that a first capacitor is charged, by means of a voltage rise on a coil after current has been removed from it, to a voltage which is positive with respect to the fixed reference-earth potential. During the on-phase of a transistor, the first capacitor charges a second capacitor to a voltage which is negative with respect to the fixed reference-earth potential and can be picked off from the outside. An electrical resistor is connected between the circuit output connection and the control line of the transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.