Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Cathode ray
Patent
1991-06-17
1993-01-19
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Cathode ray
324 77A, 364487, G01R 1320
Patent
active
051809710
ABSTRACT:
Circuits for increasing throughput in random repetitive signal acquisition systems that use triggers. The circuits allow the random repetitive signal acquisition systems to terminate an acquisition only when there is a high probability that usable samples have reached the systems. The circuits comprise logic elements for producing a qualifier signal having at least two input ports. A first delay element is coupled to a first input of the logic element for introducing a first delay in a sample signal, thereby producing a first delayed sample signal for setting the logic element and enabling the qualifier signal. A second delay element is coupled to a second input port of the logic element for introducing a second delay in the sample signal, thereby producing a second delayed sample signal for resetting the logic element and disabling the qualifier signal. The qualifying signal qualifies a trigger signal produced by trigger circuitry in the random repetitive signal acquisition system. The qualifier signal is generally periodic and is particularly useful in qualifying a trigger signal in a digitizing oscilloscope.
REFERENCES:
patent: 4072851 (1978-02-01), Rose
patent: 4641246 (1987-02-01), Halbert et al.
patent: 5003248 (1991-03-01), Johnson
Hewlett--Packard Company
Karlsen Ernest F.
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