| 摘要 |
The invention relates to a circuit arrangement for operating a discharge lamp (LA) with a high frequency current comprising: input terminals (K1, K2) for connection to a source of low frequency supply voltage; rectifier means (D1-D4) coupled to said input terminals for rectifying said low frequency supply voltage; and inverter means (Q1, Q2, DC) shunting said first capacitive means for generating the high frequency current. According to the invention the circuit arrangement incorporates two power feedback loops to feed power back to an output terminal of the rectifier bridge. As a result the circuit arrangement has a relatively simple configuration, causes only a very limited amount of harmonic distortion and can be realized with relatively cheap and simple components.
|
