Power supply circuit for a gaseous discharge tube device

Details Power supply circuit for a gaseous discharge tube device Power supply circuit for a gaseous discharge tube device

H - Electricity

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J

355/51

H01J 19/82 (2006.01) H03K 3/57 (2006.01) H03K 17/042 (2006.01) H03K 17/687 (2006.01) H05B 41/32 (2006.01) H03K 17/00 (2006.01)

Patent

CA 2013032

Abstract An improved power supply circuit for supplying power to intermittently energized loads, such as gaseous discharge tube devices. Such power supply has a trans- former wherein current flow in the primary winding is controlled by a first semiconductor device that in turn is controlled by a second semiconductor device. A feedback circuit coupled to the primary winding provides a signal for turn-off of the first semiconductor device when its turn-off is initiated by the second semiconductor device. A circuit portion connected between the primary winding and the second semiconductor device provides a signal to the second semiconductor device when it initiates a turn-off of the first semiconductor device. Such signal continues operation of the second semiconductor device until the turn-off signal from the feedback circuit is effective to turn-off the first semiconductor device serving to reduce power dissipated in the first semiconductor device.

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