| 摘要 |
To enable dimming of an energy-saving lamp, in particular a gas discharge lamp, using a standard TRIAC dimmer circuit, a large additional current is drawn when the TRIAC is in a non-conductive state, and a small additional current is drawn when the TRIAC is in a conductive state. A current control circuit may be connected between the supply voltage and the ballast circuit of the lamp for drawing said additional currents. The current control circuit comprises two switches and a number of resistors for providing a large or a small resistance. In an embodiment, the amount of current drawn is controlled instead of the resistance using additional circuitry in the current control circuit. |
