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Electronic ballast having emitter coupled transistors and bias circuit between secondary winding and the emitters
Electronic ballast having emitter coupled transistors and bias circuit between secondary winding and the emitters
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机译:电子镇流器,具有发射极耦合晶体管和次级绕组与发射极之间的偏置电路
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摘要
An electronic ballast for energizing fluorescent lamps comprising a converter including a rectifier and a filter for converting an alternating source voltage into a direct current voltage, a network including first and second switching transistors, a tank circuit having a primary winding of a transformer, a secondary winding of the transformer for providing feedback of a portion of the voltage developed across the tank circuits and a bias circuit coupled between the opposite ends of the secondary winding and the emitters of the transistor for alternatively applying bias to the transistors, the network serving to convert a direct current voltage into an amplified sinusoidal voltage having a high frequency, and fluorescent lamps connected in a series configuration coupled across the primary winding.
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