Digital glitch filter

A digital glitch filter for filtering glitches in an input signal, comprising:

• a first flip-flop for generating a filtered output signal;
• a self-oscillating circuit for generating a self-oscillating clock signal when the filtered output signal is not equal to the input signal;
• a first logic gate for enabling the self-oscillating circuit when the filtered output signal is not equal to the input signal, and disabling the self-oscillating circuit when the filtered output signal is equal to the input signal;
• a ripple counter, connected to the self-oscillating circuit, for generating a divided clock signal by dividing the self-oscillating clock signal;
• a counter and comparator connected to the ripple counter for counting the divided clock signal to obtain a count number and comparing the count number with a predetermined count target;
• and
• a second flip-flop connected to the counter and comparator for generating a valid signal, wherein the valid signal is activated when the count number reaches the count target, and
• wherein the valid signal is input to the first flip-flop such that the filtered output signal toggles when the valid signal is activated.