Patent ID: 6388852
Filing Date: 2002-05-14
Classification: G06F,H02H

Abstract:
A flicker protection circuit for protecting electronic equipment from alternating current power main flicker, comprising:(a) a voltage step down device means for providing power to a direct current power supply means and for providing signaling to an auto reset watchdog circuit means and a timing circuit means, (b) said direct current power supply means for supplying power to circuit components of said auto reset watchdog circuit means and said timing circuit means, (c) said auto reset watchdog circuit means for monitoring alternating current power and for sending a reset signal to said timing circuit means if said alternating current power flickers, (d) said timing circuit means for providing predetermined timing delay after receiving said reset signal, before said timing circuit means will activate a control device means, (e) said control device means for applying and removing said alternating current power to said electronic equipment, (f) a wave shaping circuit means for increased accuracy of monitoring alternating current power flicker, (g) a integrated digital circuit means for increased accuracy and larger flexibility of the timing delay, (h) a inductive bounce filter means wherein an inductive voltage spike could be suppressed, eliminating false triggering of the auto reset watchdog circuit means, whereby said flicker protection circuit will remove said alternating current power to said electronic equipment if said flicker occurs and, restore said alternating current power to said electronic equipment when said flicker has stopped and said alternating current power is normal, protecting said electronic equipment.