Apparatus having signal chain lock step for high integrity functional safety applications
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United States of America Patent
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Apr 14, 2020
Grant Date -
Nov 8, 2018
app pub date -
May 2, 2017
filing date -
May 2, 2017
priority date (Note) -
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Abstract
An integrated circuit (IC) chip for providing a safety-critical value includes first and second processing paths. The first processing path includes a first processing element and is coupled to receive a first input signal on a first input pin and to provide a first output signal that provides the safety-critical value on an output pin. The second processing path includes a second processing element and is coupled to receive a second input signal and to provide a second output signal. The first processing path and the second processing path are independent of each other. A smart comparator on the IC chip receives the first output signal and the second output signal and initiates a remedial action responsive to a difference between the first output signal and the second output signal reaching a configurable threshold.
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