Patent ID: 6091207
Filing Date: 2000-07-18
Classification: H05B,Y10S

Abstract:
A circuit for operating a load, in particular a low-pressure discharge lamp (E), having a frequency generator structure for supplying the load with AC current, and having a pump path for improving the electromagnetic compatibility of the circuit, which pump path connects the load circuit to a power supply side of the frequency generator structure, comprising:on the power supply side of the frequency generator structure, in a DC region a pump supporting coil (L1) is connected, upstream of the connection point of the pump path, in series with the pump path and with a path of the power supply, which pump supporting coil is designed with the purpose that in each AC cycle the load is charged and essentially completely discharged,the connection point of the pump path lies between the pump supporting inductor (L1) and a diode (D2) which is forward biased for thepower supply, anda bypass capacitor (C1) is shunt-connected with the diode (D2).