Clock glitch detection circuit
AssigneeNuvoton Technology Corporation
InventorsYung-Chi Lan, Cheng-Chih Wang
Life of this patent
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Abstract
A clock glitch detection circuit includes a detection circuit and a logic circuit. The detection circuit is configured to receive a clock input signal and a clock output signal and determines whether the clock input signal and the clock output signal are in phase, so as to output a first detection signal and a second detection signal. The logic circuit is coupled to the detection circuit and configured to receive the first detection signal and the second detection signal. The logic circuit determines whether the first detection signal and the second detection signal are in phase, so as to generate a glitch detection signal. The glitch detection signal is configured to indicate whether clock glitch occurs in the clock input signal.
Claims8
A clock glitch detection circuit comprising:
- a detection circuit configured to receive a clock input signal and a clock output signal, the detection circuit determining whether the clock input signal and the clock output signal are in phase, so as to output a first detection signal and a second detection signal;
- and
- a logic circuit coupled to the detection circuit and configured to receive the first detection signal and the second detection signal, the logic circuit determining whether the first detection signal and the second detection signal are in phase, so as to generate a glitch detection signal, wherein the glitch detection signal is configured to indicate whether a clock glitch occurs in the clock input signal,
- wherein when the clock input signal and the clock output signal are in phase, the detection circuit enables the first detection signal and the second detection signal, the logic circuit determines that the first detection signal and the second detection signal are in phase to generate the glitch detection signal, and the glitch detection signal indicates that no clock glitch occurs in the clock input signal.
Dependencies are inferred from the claim text.