Patent ID: 6456086
Filing Date: 2002-09-24
Classification: G06F

Abstract:
In combination with an electronic component, a voltage monitoring device for monitoring two supply voltages including a larger supply voltage and a smaller supply voltage to be supplied to the electronic component, each of the supply voltages produced from an operating voltage supplied to a respective integrated voltage regulator and the respective integrated voltage regulator having a regulator voltage monitor for monitoring an output voltage of the respective integrated voltage regulator and the output voltage being one of the supply voltages supplied to the electronic component, the voltage monitoring device comprising:a ratiometrically operating analog/digital converter having a reference input receiving the larger supply voltage, a measurement input receiving the smaller supply voltage, and an output, said ratiometrically operating analog/digital converter generating a digital value provided at said output; and a window comparator connected to said ratiometrically operating analog/digital converter and receiving the digital value, said window comparator comparing the digital value with predetermined limit values including an upper limit value and a lower limit value, said window comparator generating a reset signal if the digital value is greater than the upper limit value or is less than the lower limit value.