Circuit arrangement for moving a marker over the picture screen

Details Circuit arrangement for moving a marker over the picture screen Circuit arrangement for moving a marker over the picture screen

1980-07-29

1983-02-01

Hubler, Malcolm F.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

H01J 2970

Patent

active

043718132

ABSTRACT:
An arrangement for displacing a marker on the picture screen of a display device, in which, to shift the marker rapidly as well as exactly, the marker is displaced by means of a rotary pulse generator, the direction of rotation determining the direction of displacement and the speed of rotation the speed of displacement. The output pulses of the rotary pulse generator are supplied to a progressive frequency transformer which generates more output pulses per input pulse the higher the frequency of the input pulses.

REFERENCES:
patent: 2551681 (1951-05-01), Lawrence, Jr. et al.
patent: 2901664 (1959-08-01), Firmenich
patent: 3076120 (1963-01-01), Matthews et al.
patent: 3118085 (1964-01-01), Clergue et al.
patent: 4180805 (1979-12-01), Burson
patent: 4211982 (1980-07-01), Smith
"Spacewar: Real-Time Capability of the PDP-1" by J. M. Graetz, Decuscope, Information for Digital Equipment Computer Users, vol. 1, No. 1, Apr. 1962.

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