Patent ID: 7982405
Filing Date: 2011-07-19
Classification: H05B,Y02B

Abstract:
1. An igniter circuit for an HID lamp, the igniter circuit comprising: a DC input for coupling to a source of DC voltage, an output for coupling to the HID lamp, a resonant ignition circuit including: a transformer comprising a first coil and a second coil connected in series with each other, the second coil being connected in series with the lamp, the first coil being part of the oscillator prior to ignition and, after ignition, serving to block the high frequency component so as to pass the low frequency component to the lamp; and a first capacitor having a first end coupled to the first coil and having a second end coupled to both the lamp and to a first end of a second capacitor having a second end connected to ground (GND), said first capacitor and second capacitor being configured for passing the high frequency component from the current source to GND.