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    • 6. 发明申请
    • Radio Station and Method of Operating a Radio Station
    • 无线电台和操作无线电台的方法
    • US20080309250A1
    • 2008-12-18
    • US12097572
    • 2006-12-08
    • Jos Van MeursAntonio De Almeida TavaresDennis Johannes Antonius Claessens
    • Jos Van MeursAntonio De Almeida TavaresDennis Johannes Antonius Claessens
    • H05B41/36H05B41/24
    • H05B41/2827H02M2001/0006
    • A lamp driver circuit supplies an alternating current having an operating frequency to a lamp, e.g. a fluorescent lamp, for operating the lamp. To switch off the lamp, the frequency of the alternating current is changed to a non-operating frequency. Due to the frequency change, the impedance of an impedance element of the lamp driver circuit is changed. As a result, the lamp current decreases to zero and the lamp extinguishes. According to the invention, the current having the non-operating frequency is employed to generate a voltage to be supplied to a further circuit, such as a control circuit. Thus, the lamp driver circuit and an associated control circuit may operate in an operating mode or in a standby, i.e. non-operating, mode without requiring a separate voltage supply source. In the standby mode, the control circuit may be controlled to switch the lamp driver circuit from the non-operating mode into the operating mode, thereby switching the lamp on.
    • 灯驱动器电路向灯提供具有工作频率的交流电,例如, 荧光灯,用于操作灯。 要关闭灯泡,交流电频率变为非工作频率。 由于频率变化,灯驱动电路的阻抗元件的阻抗发生变化。 结果,灯电流降低到零,灯熄灭。 根据本发明,采用具有非工作频率的电流来产生要提供给诸如控制电路之类的其它电路的电压。 因此,灯驱动器电路和相关联的控制电路可以在操作模式或待机(即非操作)模式下操作,而不需要单独的电压源。 在待机模式下,可以控制控制电路以将灯驱动电路从非操作模式切换到操作模式,从而将灯接通。