Apparatus including a programmable set-up and hold feature

Details Apparatus including a programmable set-up and hold feature Apparatus including a programmable set-up and hold feature

1982-07-19

1985-09-10

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

364551, 364569, H04L 100

Patent

active

045411000

ABSTRACT:
An input apparatus for a multi-channel device, such as a logic analyzer, is disclosed, the input apparatus providing the multi-channel device with a programmable set-up and hold feature. The multi-channel device acquires a logic signal from a product under test, the logic signal having associated therewith an actual set-up and hold time with respect to an external clock signal. The actual set-up and hold times are entered into the multi-channel device via a keyboard and a display. The device has stored therein a desired set-up and hold time required by the logic signal relative to the external clock signal. In accordance with the actual and the desired set-up and hold times, the multi-channel device changes the relative orientation of the acquired logic signal with respect to the external clock signal, along the time axis until the set-up and hold times of the acquired logic signal are changed from the actual value to the desired value. As a result, the multi-channel device can be used to troubleshoot any product under test regardless of the set-up and hold times of the generated logic signals, relative to an external clock signal, associated therewith.

REFERENCES:
patent: 3706091 (1972-12-01), May, Jr.
patent: 4223404 (1980-09-01), Lowenschuss
patent: 4349918 (1982-09-01), Gordon
patent: 4351059 (1982-09-01), Gregoire
patent: 4380816 (1983-04-01), Nicholls
patent: 4428076 (1984-01-01), Schvon

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