Voltage comparator having hysteresis characteristics
First Claim
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1. A voltage comparator having hysteretic characteristics, said voltage comparator comprising:
- a comparing section for comparing an input voltage with a reference voltage so as to output a high-level signal or a low-level signal; and
a reference voltage changing section for changing the reference voltage when the low-level signal is outputted from the comparing section;
wherein the comparing section includes;
a switching section that is driven by the input voltage and the reference voltage;
a voltage drop unit that is connected to the switching section and a ground terminal so as to generate a voltage drop;
a signal output section that is connected to the voltage drop unit so as to output the high-level or low-level signal through an output terminal; and
a bias current section that is connected to the switching section and the signal output section so as to maintain a constant amount of current.
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Abstract
A voltage comparator having hysteresis includes a comparing section that compares an input voltage with a reference voltage so as to output a high-level or low-level signal; and a reference voltage changing section that changes the reference voltage when a low-level signal is output from the comparing section.
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Citations
13 Claims
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1. A voltage comparator having hysteretic characteristics, said voltage comparator comprising:
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a comparing section for comparing an input voltage with a reference voltage so as to output a high-level signal or a low-level signal; and a reference voltage changing section for changing the reference voltage when the low-level signal is outputted from the comparing section; wherein the comparing section includes; a switching section that is driven by the input voltage and the reference voltage; a voltage drop unit that is connected to the switching section and a ground terminal so as to generate a voltage drop; a signal output section that is connected to the voltage drop unit so as to output the high-level or low-level signal through an output terminal; and a bias current section that is connected to the switching section and the signal output section so as to maintain a constant amount of current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification