Voltage monitoring controlling and protecting apparatus...

Details Voltage monitoring controlling and protecting apparatus... Voltage monitoring controlling and protecting apparatus...

H - Electricity

05

B

320/1, 315/15, 3

H05B 41/32 (2006.01) H02J 7/00 (2006.01) H02M 3/338 (2006.01)

Patent

CA 1042977

ABSTRACT OF THE DISCLOSURE A PUT circuit compares a zener reference voltage with the voltage of an electronic flash storage capacitor, and starts and stops a battery powered d.c. to d.c. converter oscillator, which charges the capacitor, as necessary to maintain the capacitor voltage within desired limits. A zener diode in the PUT cathode circuit provides the desired hysteresis. A second PUT circuit compares a second zener reference voltage with the battery voltage, and stops the oscillator when the battery voltage drops to a pre- determined minimum value.

200980

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