Importance

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Abstract

For use in a processor supervisory circuit, a power-on reset circuit, a method of producing a power-on reset ('RESET') signal and a power supply including the circuit. The circuit includes: (1) an adaptive, nonlinear voltage divider having a voltage input and a voltage output, the divider dividing an unscaled, unregulated voltage received at the voltage input by a factor that varies a function of the unscaled, unregulated voltage to produce a scaled, unregulated voltage at the voltage output and (2) a comparison circuit for comparing the scaled, unregulated voltage with a scaled, regulated voltage to produce the RESET signal when the scaled, regulated voltage exceeds the scaled, unregulated voltage, the divider being adaptive and nonlinear to ensure that the comparison circuit continuously produces the RESET signal when the scaled, regulated voltage exceeds the scaled, unregulated voltage and thereby avoid premature activation of a processor couplable to the power-on reset circuit.

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First Claim