Title: Digital signal detector

Abstract: An apparatus is provided for detecting digital pulses or pulse intervals and any combination thereof. Logic means is provided wherein the complement of the interval to be measured is loaded into a digital counter, and certain states of this counter are decoded to set and reset, respectively, an in-bin flip-flop. Operation is initiated when a digital input is received. If the interval to be measured terminates while the in-bin flip-flop is set, an output is generated indicating that a "hit" has been scored and the parameters of the measurement can be read out. Code words stored in a memory provide the specific parameters of measurement, and particular portions of the code words are employed depending on the desired mode of operation. Each code word contains data corresponding to the interval to be measured, desired resolution, clock rate to be employed, end of cycle in cases where a pattern of pulses and intervals is to be detected, and an indication of whether a pulse or an interval between pulses is to be measured.

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Inventors: Richardson, Alexander Laidlaw (Livingston, NJ, US)

Application Number: 508926
Filing Date: 1974-09-25
Publication_date: 1976-09-21
Assignee: International Telephone and Telegraph Corporation (Nutley, NJ)
Primary Class(es): 377/55 327/31, 327/39, 377/41, 377/52, 968/846, 968/DIG1
Other Classes:
US Patent Ref:

3581066	May, 1971	Maure et al.	235/92.
3667054	May, 1972	Nelson	328/111.
3714645	Jan, 1973	Sivertso, Jr.	235/92.
3728635	Apr, 1973	Eisenberg	235/92.
3790881	Feb, 1974	Smith	328/111.
3840174	Oct, 1974	Craft	235/92.

Other Refs:
Primary Examiner: Boudreau, Leo H.
Assistant Examiner:
Attorney: O'Halloran; John T., Van Der Sluys; Peter, Ingrassia; Vincent