| 摘要 |
A voltage level detection circuit is described which can detect changes in a supply voltage level. A difference voltage generating circuit produces a voltage across the two terminals of a resistor which is a function of the supply voltage level. The voltage at each terminal of the resistor are fed to the inputs of an unbalanced comparator. The output voltage of the unbalanced comparator provides a voltage signal related to the supply voltage level which can be used to detect changes in the supply voltage level, compensate for changes in the supply voltage level, or the like.
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