Temperature dependent timer circuit
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United States of America Patent
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Mar 17, 2015
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Nov 15, 2012
filing date -
Nov 15, 2012
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Abstract
A timer to provide pulses at a comparator output wherein a frequency of the pulses is dependent on temperature, wherein providing each pulse includes biasing a first input of the comparator at a voltage and operating a transistor in a subthreshold region of operation to change the voltage of the first input of a comparator at a rate dependent upon temperature. The output of the comparator changes state when the voltage of the first input crosses a voltage of a second input of the comparator.
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