发明公开
- 专利标题： CIRCUIT ARRANGEMENT
- 专利标题（中）： 电路布置
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申请号： EP97909533.0申请日： 1997-11-06
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公开(公告)号： EP0880820A2公开(公告)日： 1998-12-02
- 发明人: PORATH, Rebekka , HILGERS, Achim
- 申请人： Koninklijke Philips Electronics N.V.
- 申请人地址： Groenewoudseweg 1 5621 BA Eindhoven NL
- 专利权人： Koninklijke Philips Electronics N.V.
- 当前专利权人： Koninklijke Philips Electronics N.V.
- 当前专利权人地址： Groenewoudseweg 1 5621 BA Eindhoven NL
- 代理机构： Evers, Johannes Hubertus Maria, et al
- 优先权： EP19960203406 19961202
- 国际公布： WO1998025441 19980611
- 主分类号： H03B1
- IPC分类号： H03B1 ; H05B41
摘要：
The invention relates to a circuit arrangement for operating a discharge lamp comprising an oscillator (OSC) for generating a high frequency input voltage, a piezo-electric transformer (PT) equipped with input terminals (I1, I2) coupled to the oscillator and output terminals (O1, O2), a load circuit (C, K1, K2) coupled to the output terminals of the piezo-electric transformer and comprising terminals for lamp connection (K1, K2). According to the invention the load circuit comprises an adjustable capacitor (C). This adjustable capacitor forms very simple means for controlling the light output of the discharge lamp over a wide range.
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