Detection circuit and detection method for fail signal
AssigneeNuvoton Technology Corporation
InventorsLing-I Cheng, Yuan-Po Cheng, Pao-Shu Chang
Life of this patent
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Abstract
A detection circuit is provided in the invention. The detection circuit includes a synchronous circuit, a comparison circuit and a fail-signal generating circuit. The comparison circuit is coupled to the synchronous circuit. The comparison circuit compares a target signal with a reference signal to generate a comparison result. The frequency of the reference signal is lower than the frequency of the target signal. The fail-signal generates circuit is coupled to the synchronous circuit and the comparison circuit. The fail-signal receives the comparison circuit. According to the comparison circuit, the fail-signal determines whether the target signal has failed.
Claims18
A detection circuit, comprising:
- a synchronous circuit;
- a comparison circuit, coupled to the synchronous circuit, and comparing a target signal with a reference signal to generate a comparison result, wherein a frequency of the reference signal is lower than a frequency of the target signal;
- and
- a fail-signal generating circuit, coupled to the synchronous circuit and the comparison circuit, receiving the comparison result, and according to the comparison circuit, determining whether the target signal has failed,
- wherein the synchronous circuit receives the reference signal and an enable signal and according to the reference signal and the enable signal, generates a synchronous signal.
A fail-signal detection method, applied to a detection circuit, comprising:
- comparing, by a comparison circuit of the detection device, a target signal with a reference signal to generate a comparison result, wherein a frequency of the reference signal is lower than a frequency of the target signal;
- receiving, by a synchronous circuit of the detection circuit, the reference signal and an enable signal;
- according to the reference signal and the enable signal, generating a synchronous signal;
- and
- receiving, by a fail-signal generating circuit of the detection device, the comparison result and determining whether the target signal is failed according to the comparison circuit.
Dependencies are inferred from the claim text.