Trigger arrangement suitable for oscillscopes

Details Trigger arrangement suitable for oscillscopes Trigger arrangement suitable for oscillscopes

1988-02-01

1989-08-08

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307261, 307228, 328181, H03K 117, H03K 700

Patent

active

048556823

ABSTRACT:
A trigger arrangement suitable for use in oscilloscopes which include a cathode-ray tube as a change display device, a trigger output signal (10) is displayed from a trigger input signal (6) after the trigger arrangement is released by a release signal (8). Use is made of a series-combination of three bistable elements (2,4,16). The trigger input signal is applied in parallel to the bistable elements and the trigger output signal is obtained after the output of each bistable element has successively changed its state, a difference occurring between the switching levels of the successive bistable elements when the trigger input signal is applied to the bistable elements via differential amplifiers--assumed to be included in the bistable elements (2,4,16). The first two bistable elements (2,4) form an accurately defined release signal (17) for releasing the third bistable element (16). The instant of release of the third bistable element is thereby prevented from coinciding--up to very high frequencies--with the instant at which the trigger input signal can cause the output (23) of the third bistable element to change its state after release of the third bistable element. In the case of an oscilloscope provided with such a trigger arrangement "jitter"-free signals can be displayed up to very high frequencies.

REFERENCES:
patent: 3350576 (1967-10-01), Zimmerman
patent: 3530315 (1970-09-01), Kaufman
patent: 3558930 (1971-01-01), Knapton
patent: 3649852 (1972-03-01), Bohley
patent: 3725792 (1973-04-01), Kellogg
patent: 4499386 (1985-02-01), Schlotzhauer et al.

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