Signal detector with improved noise immunity

Details Signal detector with improved noise immunity Signal detector with improved noise immunity

1998-08-25

2000-08-15

Cunningham, Terry D.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By pulse width or spacing

327217, G01R 2902

Patent

active

061042153

ABSTRACT:
A method for processing a signal transitioning from a high state to a low state is described, comprising the steps of detecting a transition of the signal from a high state to a low state, setting a timer for a predetermined interval, sampling, while the timer is running, the signal to determine whether the signal remains in a low state, determining, by reading the timer, whether the predetermined interval has elapsed, repeating the sampling and determining steps until the predetermined interval has elapsed; and concluding, if the signal remains in a low state for each instance of said sampling step, that the transition is valid.

REFERENCES:
patent: 5225715 (1993-07-01), Mori et al.
patent: 5317215 (1994-05-01), Kranzler
patent: 5646565 (1997-07-01), Tulidate
patent: 5826061 (1998-10-01), Walp
"Pulse discriminator excises narrow pulses", by Mark Vitunic, EDN, p. 102, Nov. 20, 1997.

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