Analog display of signal swing and logic analyzer thresholds

Details Analog display of signal swing and logic analyzer thresholds Analog display of signal swing and logic analyzer thresholds

2005-10-17

2008-08-12

Barlow, Jr., John E. (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system

Measured signal processing

C702S068000, C715S771000, C725S022000

Reexamination Certificate

active

07412355

ABSTRACT:
A Logic Analyzer has an intuitive and informative analog presentation of signal activity and threshold settings formed by gathering a collection of factors pertaining to the measurement to be performed, such as information about which channels are members of labeled collections. A scan of signal activity is performed for each assigned channel as its threshold is briefly swept. This produces a range of voltage that describes that signal's signal activity. For each Probe Pod these ranges are then displayed in columns as adjacent vertical segments of a voltage swing Y axis along a channels-within-a-probe-pod X axis. The Y axis is labeled with actual voltage values. Superimposed upon this analog style display is a horizontal line indicating the associated threshold for that Probe Pod. Further annotations include channel identifiers and signal activity indicators whose shapes connote recurring transitions and signals that appear to be ‘stuck’ either HIGH or LOW. Collections of related columns are labeled according to the Probe Pod with which they are associated.

REFERENCES:
patent: 4040025 (1977-08-01), Morrill et al.
patent: 6707474 (2004-03-01), Beck et al.
patent: 2003/0115591 (2003-06-01), Weissmueller et al.

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