Channel-gain-vernier-tracking trigger hysteresis for an oscillos

Details Channel-gain-vernier-tracking trigger hysteresis for an oscillos Channel-gain-vernier-tracking trigger hysteresis for an oscillos

1988-11-14

1989-04-18

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Cathode ray

324 77A, 364487, G01R 1320, G01R 1508

Patent

active

048230774

ABSTRACT:
Disclosed is a circuit for maintaining a constant effective hysteresis at the input to a trigger comparator of an oscilloscope for the purpose of preventing double triggering due to false triggers. A microprocessor tracks the trigger amplifier gain control inversely relative to the vertical vernier amplifier gain control via digital-to-analog converters at the input to each gain control. Such tracking serves to adjust the trigger signal inversely relative to the on-screen signal such that a constant hystersis is maintained.

REFERENCES:
patent: 4134149 (1979-01-01), Nord
patent: 4225940 (1980-09-01), Moriyasu et al.
patent: 4346333 (1982-08-01), Dagostino
patent: 4510571 (1985-04-01), Dagojtino et al.
patent: 4647915 (1987-03-01), Shank et al.
patent: 4749907 (1988-06-01), Boatwright et al.

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