Oscilloscope pretrigger circuit

Details Oscilloscope pretrigger circuit Oscilloscope pretrigger circuit

1977-09-28

1978-12-12

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

G01R 1342

Patent

active

041298284

ABSTRACT:
The circuit includes a phase-locked loop that produces pulses a fixed number of engine degrees before the ignition signals. These pulses are used to initiate the horizontal sweep of an oscilloscope that displays the ignition pulses. Accordingly, the ignition signals commence not at the beginning of the display where useful information may be lost, but rather a predetermined number of engine degrees later.

REFERENCES:
patent: 4010415 (1977-03-01), Reeves et al.
patent: 4010419 (1977-03-01), Reeves et al.

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