| 摘要 |
A circuit ( 300 ) for igniting a high intensity discharge (HID) lamp comprises input terminals ( 302,304 ), output terminal ( 306,308 ), a charging circuit (R<SUB>IGN</SUB>,C<SUB>IGN</SUB>), a transformer ( 320 ) having a primary winding ( 322 ) and a secondary winding ( 324 ), a MOSFET ( 340 ), and a clamping diode (D<SUB>CLAMP</SUB>). During operation, ignitor circuit ( 300 ) provides a high voltage (V<SUB>IGN</SUB>) for igniting an HID lamp. Ignitor circuit ( 300 ) provides an ignition voltage (V<SUB>IGN</SUB>) having a peak magnitude that is more predictable and less prone to degradation due to the influences of parasitic components. Additionally, ignitor circuit ( 300 ) may be realized in a manner that is significantly more cost-effective than comparable prior art circuits.
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