Patent ID: 6104215
Filing Date: 2000-08-15
Classification: G01R

Abstract:
A method for processing a signal transitioning from a high state to a low state comprising:a. providing a first integrated circuit having at least one input and at least one output and a second integrated circuit having at least one input and at least one output;b. providing a preconditioner configured to remove high frequency noise, said preconditioner coupled between said at least one first integrated circuit output and said at least one second integrated circuit input;c. detecting a transition of the signal from a high state to a low state in said preconditioner from said at least one output from said first integrated circuit;d. setting a timer for a predetermined interval;e. sampling, while said timer is running, the signal to determine whether the signal remains in the low state throughout said predetermined time period;f. determining, by reading said timer, whether said predetermined interval has elapsed;g. repeating said sampling of the signal and said determining whether said predetermined interval has elapsed until said predetermined interval has elapsed;h. concluding, if the signal remains in a low state for each instance of said sampling of the signal, that the transition is a valid signal; andi. communicating said valid signal to said second integrated circuit.