| 摘要 |
An interface circuit is disclosed for operating a light source from an electronic fluorescent driver. In one example, the interface circuit comprises
input terminals for connection to lamp connection terminals of the electronic fluorescent lamp driver,a first string interconnecting a first pair of input terminals,a second string interconnecting a second pair of input terminals,a third string interconnecting a first terminal of the first string and a second terminal of the second string and comprising a rectifier, output terminals of said rectifier being coupled during operation to the light source.;When a light source is operated making use of the interface circuit, a proper emulation of a fluorescent lamp is obtained. |
| 主权项 |
1. An interface circuit for operating a light source, equipped with
input terminals for connection to lamp connection terminals of an electronic fluorescent lamp driver, a first string, conductively interconnecting a first pair of input terminals, a second string, conductively interconnecting a second pair of input terminals, a third string, conductively interconnecting a first terminal of the first string and a second terminal of the second string, wherein the third string comprises a rectifier, output terminals of said rectifier being coupled, during operation, to the light source, and a first switching element for controlling the conductive state of the third string, such that the third string delivers a driving current to the light source when the first switching element is conductive, a fourth string coupled to the third string and comprising a sensor circuit, having an output terminal coupled to a control electrode of the first switching element, for sensing the amplitude of a high frequency AC voltage between the first and the second terminal and for rendering the first switching element conductive when the amplitude of the high frequency AC voltage reaches a predetermined value. |
