Voltage monitoring circuit

Details Voltage monitoring circuit Voltage monitoring circuit

1984-12-04

1986-09-23

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307358, 307360, 328146, H03K 5153, G01R 19165, G01R 19175

Patent

active

046137700

ABSTRACT:
A circuit for determining whether a voltage is within a lower voltage range (+12 VDC) or a higher voltage range (+24 VDC) is provided. This circuit includes a resistor-based voltage-scaling circuit, a zener diode reference voltage circuit, and comparators for comparing the scaled voltages across the voltage-scaling circuit and zener diode circuit and for switching in response to the comparison outcome. The comparator output has a first state when the voltage is within acceptable limits in either the 12 VDC or 24 VDC range and a second state when the voltage is outside the acceptable range. Additional comparator circuitry switches the sensitivity of the resistor-scaling network between the 12 VDC and 24 VDC ranges.

REFERENCES:
patent: 3916262 (1975-10-01), Easter

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