The Anti-Tamper Digital Clocks Diaries
The Anti-Tamper Digital Clocks Diaries
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Clock-signals with uneven duty cycles may very well be detected through the use of dual circuits: a person pushed via the clock signal and A different pushed because of the negated clock sign. Without the dual circuits, the frequency may be slowed down undetectably by raising the reset time period but holding the analysis time period constant.
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30. An apparatus for detecting voltage tampering, comprising: usually means for delivering a gentle-point out monotone sign for the duration of an Examine time frame;
25. The strategy for detecting voltage tampering as outlined in assert 23, wherein using the clock to result in the Assess circuit comprises using a clock edge at an conclude of your Examine time period to set off the Consider circuit.
The h2o level range may be identified determined by delayed monotone indicators from a number of prior Appraise time. The plurality of resettable hold off line segments may comprise taps along a hold off line. Alternatively, the plurality of resettable hold off line segments comprises parallel hold off strains.
22. An equipment for detecting clock tampering, comprising: a first circuit that provides a first monotone sign all through a first clock Assess time frame linked to a clock;
What is claimed is: 1. A technique for detecting clock tampering, comprising: providing a plurality of resettable hold off line segments, whereby resettable delay line segments in between a resettable delay line segment connected with a minimum amount delay time and also a resettable delay line segment connected to a optimum hold off time are each associated with discretely growing delay instances;
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34. The apparatus for detecting voltage tampering as defined in claim 33, whereby the drinking water Anti-Tamper Digital Clocks degree quantity is decided based on delayed monotone alerts from a number of past Examine time.
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12. The apparatus for detecting clock tampering as outlined in assert eleven, wherein the h2o amount variety is decided dependant on delayed monotone indicators from a number of former clock Examine time.
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forty. The equipment for detecting voltage tampering as outlined in assert 37, wherein the Consider circuit establishes no matter if the amount of ones while in the plurality of delayed monotone signals differs from the drinking water degree selection by more than a predetermined threshold to detect the voltage fault.
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