Power source voltage checking circuit

Details Power source voltage checking circuit Power source voltage checking circuit

1979-10-22

1981-03-31

Gellner, Michael L.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324433, 340636, 354 60E, 354289, G03B 1718, G03B 1738, G08B 2100

Patent

active

042589991

ABSTRACT:
A voltage checking circuit for checking a power source battery whose terminal voltage changes with time at an early stage subsequent to closing the battery load circuit. The checking circuit correctly checks whether the battery is effective or ineffective even while the terminal voltage is changing. To this end, there is provided a voltage generating circuit which is responsive to the change of the power source battery voltage and generates a constant output when a critical effective battery that shows a critical voltage at its steady state, is in use. The voltage generating circuit generates a voltage other than the constant voltage with a battery other than the critical effective battery. Thus, the power source battery is checked in accordance with the output of the voltage generating circuit.

REFERENCES:
patent: 3925771 (1975-12-01), Satake
patent: 4126874 (1978-11-01), Suzuki et al.

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