FLASH LAMP POWER SUPPLY CIRCUIT
Original Publication Date: 1984-Dec-31
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
Figure 1 shows a two level power supply circuit for energizing a flash lamp 10. Capacitors 12 and 14 are charged from an AC input source via a grounded center-tapped transformer 16. The combined voltage across capacitors 12 and 14 is higher than the voltage ratings of SCRs 18 and 20. This combined capacitor voltage is divided approximately in half between the 2 capacitors to provide a voltage well within the safe operating range of either SCR 18 or 20. The lamp is triggered into operation by trigger circuit 22. Following discharge by the capacitor, each capacitor is quenched independently. This arrangement permits low voltage SCRs to be used.