Circuit for the control of a triac without galvanic isolation
US7224087B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2003 |
| Grant date | May 29, 2007 |
| Priority date | — |
| Expiry date | Jan 7, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/722
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit for controlling a bidirectional switch referenced to a first reference voltage by a control circuit supplied by a first voltage and referenced to a second reference voltage. The supply voltage of the control circuit is connected by a diode to a coupling circuit comprising a node, this node being connected to the collector of an NPN transistor having its emitter connected to the second reference voltage and having its base receiving the output of the control circuit, to a first terminal of a capacitor having its second terminal connected to the first reference voltage, to the emitter of a PNP transistor having its base connected to the collector of the transistor, and having its collector connected to the control terminal of the bidirectional switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.