Differential input comparator with double sided hysteresis
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United States of America Patent
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May 15, 2001
Grant Date -
N/A
app pub date -
Jun 30, 2000
filing date -
Jun 30, 2000
priority date (Note) -
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Abstract
A current-controlled differential input comparator having a double sided hysteresis is provided, including a differential input comparator having a first comparator input, a second comparator input, a comparator output, and a switching threshold, wherein the switching threshold causes the comparator output to have a first output state when the first comparator input is greater than the second comparator input and to have a second output state when the first comparator input is less than the second comparator input, a first hysteresis resistor communicating with the first comparator input, a second hysteresis resistor communicating with the second comparator input, an inverter connected to the comparator output, the inverter generating an inverted comparator output, and a current supply connected to the comparator output and to the inverted comparator output, the current supply being capable of switching a first hysteresis current to the first hysteresis resistor and a second hysteresis current to the second hysteresis resistor, wherein the double sided hysteresis is created by the first hysteresis current flowing through the first hysteresis resistor and by the second hysteresis current flowing through the second hysteresis resistor.
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