Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1976-06-24
1977-04-26
Wilbur, Maynard R.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
315392, H01J 2952
Patent
active
040203921
ABSTRACT:
Two (or more) periodically reproducible input signals V.sub.yI, V.sub.yII, possibly including a constant reference signal, are visually displayed on an oscilloscope screen with the aid of a normally suppressed electron beam under the control of a horizontal-sweep generator and a vertical-sweep generator producing a sinusoidal x-deflection and y-deflection signals V.sub.xR and V.sub.yR, respectively. The x-deflection signal V.sub.xR is continuously compared with two (or more) ramp signals V.sub.xI and V.sub.xII, of different periodicities substantially lower than the frequencies of the deflection signals, respectively assigned to the input signals V.sub.yI, V.sub.yII to be displayed; upon the occurrence of a coincidence with one of these ramp signals, the horizontal sweep is halted or slowed down -- preferably to the slope of the coincident ramp signal -- for a display interval equaling one cycle of the y-deflection signal V.sub.yR which at some point during this interval matches the corresponding input signal. At that point the beam is turned on to illuminate the screen for the remainder of the display interval, thereby tracing a short section of the input signal concerned.
REFERENCES:
patent: 3599033 (1971-08-01), Stettiner et al.
Funk Hans
Harzer Peter
Blum T. M.
Dubno Herbert
Ross Karl F.
Wandel u. Goltermann
Wilbur Maynard R.
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