Voltage detector and method for detecting voltage
AssigneeCypress Semiconductor Corporation
InventorsYoshiyuki Endo, Kazuhiro Kamiya
Life of this patent
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Abstract
A voltage detector includes a comparison unit which is equipped with a plurality of comparators and which is configured to compare a threshold voltage and determination voltages corresponding to each comparator and output a first result of High or Low for each comparator and configured to compare an input voltage and the determination voltages and output a second result of High or Low for each comparator, and a determination unit configured to determine based on the first result and the second result whether or not the input voltage is less than or equal to the threshold voltage.
Claims8
A voltage detector, comprising:
- a comparison unit having a plurality of comparators, said comparison unit configured to compare a threshold voltage received via a voltage divider and determination voltages corresponding to said each comparator, and output a first result of High or Low for each comparator based on the comparison of the threshold voltage and the determination voltages, the comparison unit being further configured to compare an input voltage received via the voltage divider and the determination voltages, and output a second result of High or Low for each comparator based on the comparison of the input voltage and the determination voltages;
- and
- a determination unit comprising a counter configured to determine whether or not the input voltage is less than or equal to the threshold voltage, the determination being based on a count of High levels output by each of the plurality of comparators for the threshold voltage, and based on a count of High levels output by each of the plurality of comparators for the input voltage.
A method for detecting a voltage, comprising the steps of:
- comparing, using a plurality of comparators within a comparison unit, a threshold voltage received via a voltage divider and determination voltages corresponding to each of the comparators and outputting a first result of High or Low for each comparator;
- comparing, using the comparison unit, an input voltage received via the voltage divider and the determination voltages and outputting a second result of High or Low for each comparator;
- and
- determining, using at least a counter of a determination unit, whether or not the input voltage is less than or equal to the threshold voltage, the determining being based on a count of High levels output by each of the plurality of comparators for the threshold voltage, and based on a count of High levels output by each of the plurality of comparators for the input voltage.
Dependencies are inferred from the claim text.