Schmitt-trigger circuit with low power consumption
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United States of America Patent
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May 9, 2000
Grant Date -
N/A
app pub date -
Aug 6, 1998
filing date -
Aug 6, 1998
priority date (Note) -
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Abstract
The present invention discloses a Schmitt-trigger circuit with less power consumption by reducing the amount of the required DC current. The Schmitt-trigger circuit disclosed in the present invention basically encompasses a comparison circuit, a first current cutting circuit, and a second current cutting circuit. The comparison circuit receives the input signal and then generates the output signal. Both the first and second current cutting circuits feed in the output signal, and then generate feedback signals to feed the comparison circuit for cutting the DC current path when the input signal rises or falls to predetermined trigger points. When there is only one of the first and second current cutting circuits is required, the higher or lower trigger point can be adjusted without necessary to vary the size-ratio of the PMOS and NMOS transistors.
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