Power supply sensing circuitry
First Claim
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1. Power supply sensing circuitry for a data processing system comprising:
- a first comparator for comparing the power supply potential at the input to a voltage regulator with the output voltage from the voltage regulator, and for producing a signal when the supply voltage exceeds the output volage by a predetermined amount;
a second comparator for comparing the power supply potential with a reference voltage and for producing a signal when the power supply potential is at least the voltage required to operate the data processing system;
driver means for providing voltages to the data processing system; and
,means for enabling the driver means when a said signal is produced by both the first comparator and the second comparator.
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Abstract
Power supply sensing circuitry comprises a first comparator for determining whether the power supply potential voltage exceeds by a predetermined amount the voltage required to operate a data processing system connected to the power supply potential, and a second comparator for determining whether the power supply potential is at least the voltage required to operate the connected data processing system.
67 Citations
7 Claims
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1. Power supply sensing circuitry for a data processing system comprising:
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a first comparator for comparing the power supply potential at the input to a voltage regulator with the output voltage from the voltage regulator, and for producing a signal when the supply voltage exceeds the output volage by a predetermined amount; a second comparator for comparing the power supply potential with a reference voltage and for producing a signal when the power supply potential is at least the voltage required to operate the data processing system; driver means for providing voltages to the data processing system; and
,means for enabling the driver means when a said signal is produced by both the first comparator and the second comparator. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification