Debounce circuit with noise immunity and glitch event tracking
摘要:
A debounce circuit and a method for masking or filtering a glitch from an input signal are provided. The debounce circuit includes a reset synchronizer circuit and a logic circuit. The reset synchronizer circuit receives the input signal, detects a glitch in the input signal and outputs one or more reset synchronizer output signals having a first reset synchronizer state indicating detection of the glitch. The logic circuit receives the one or more reset synchronizer output signals, determines that the one or more reset synchronizer output signals are in the first reset synchronizer state indicating detection of the glitch and in response to determining that the one or more reset synchronizer output signals are in the first reset synchronizer state, keeps an output signal of the debounce circuit in a present state of the output signal of the debounce circuit.
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