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US 5,315,627 AGranted
Pseudo-random repetitive sampling of a signal
AssigneeHewlett-Packard Company
InventorSteven D. Draving
Life of this patent
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AssigneeHewlett-Packard Company
InventorSteven D. Draving
Estimating the term…
A pseudo-random repetitive sampling circuit which is capable of sampling fast signals, sampling negative and positive time around a trigger event, and rapidly building the waveform for display. The circuit accomplishes this by acquiring negative and positive time in two different ways. Positive time information is acquired using a modified form of sequential sampling, since sequential sampling can rapidly build the signal for samples that occur after the trigger event. The system also may take multiple samples for each trigger event. For samples occurring prior to the trigger event, the system uses a modified form of random repetitive sampling. The modification comprises sampling of the waveform prior to allowing any trigger events to occur, and qualifying each trigger event so that a trigger event is only recognized when it occurs in a programmable time window after a sample.
A circuit for sending a sample signal, said sample signal being used to cause analog to digital conversion of an input signal, said circuit comprising:
A circuit for sending a sample signal within a digitizing oscilloscope, said sample signal being used to cause analog to digital conversion of a signal input to said digitizing oscilloscope, said circuit comprising:
A circuit for sending a sample signal within a digitizing oscilloscope, said sample signal being used to cause analog to digital conversion of a signal input to said digitizing oscilloscope, said circuit comprising:
Dependencies are inferred from the claim text.