Anti-Tamper Digital Clocks - An Overview
Anti-Tamper Digital Clocks - An Overview
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means for analyzing that employs the plurality of delayed monotone alerts to detect a clock fault and
25. The tactic for detecting voltage tampering as described in assert 23, whereby utilizing the clock to bring about the evaluate circuit comprises employing a clock edge at an end in the evaluate time frame to trigger the Appraise circuit.
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15. An apparatus for detecting clock tampering, comprising: a circuit that provides a monotone sign throughout a clock Consider period of time affiliated with a clock;
The rear Complete method within your respective clock enclosure has four mounting holes to drill in to the wall for mounting the rear in the wall, the digital clock is then mounted into the rear physique and also the entrance component is then set in into the rear aspect and secured in posture with anti-tamper fasteners.
19. The equipment for detecting clock tampering as described in assert 18, wherein the water level amount is decided based on delayed monotone signals from a number of former clock Appraise here time.
a plurality of resettable delay line segments that hold off the monotone signal to generate a respective plurality of delayed monotone signals Every single obtaining either a just one or a zero logic price, wherein resettable hold off line segments among a resettable delay line segment associated with a least hold off time and also a resettable hold off line phase affiliated with a utmost delay time are each associated with discretely expanding hold off times; and
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A further aspect of the creation may possibly reside in an apparatus for detecting clock tampering, comprising: implies 250 for supplying a monotone signal 220 for the duration of a clock Assess time frame 310 affiliated with a clock CLK; signifies 210 for delaying the monotone signal using a plurality of resettable hold off line segments to crank out a respective plurality of delayed monotone signals 230 owning discretely growing delay situations amongst a minimal delay time plus a most hold off time; and means 240 for using the clock CLK to induce an Examine circuit 240 that takes advantage of the plurality of delayed monotone signals to detect a clock fault.
Yet another aspect of the invention may possibly reside in an equipment for detecting clock tampering, comprising: indicates for giving a monotone signal in the course of a clock Consider period of time connected with a clock; means for delaying the monotone signal employing a plurality of resettable hold off line segments to generate a respective plurality of delayed monotone alerts possessing discretely raising delay times between a minimum amount hold off time in addition to a highest delay time; and indicates for using the clock to trigger an evaluate circuit that employs the plurality of delayed monotone alerts to detect a clock fault.