Circuit for digitally controlling the brightness of the electron

Details Circuit for digitally controlling the brightness of the electron Circuit for digitally controlling the brightness of the electron

1974-04-25

1976-05-04

Farley, Richard A.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315 30, 315384, H01J 2552

Patent

active

039551202

ABSTRACT:
A circuit for digitally controlling the brightness of the electron beam of an electron beam deflection tube. The circuit permits switching at a very fast rate on the order of 200 nanoseconds. To this end, a differential amplifier is used having an input and an output transistor which may be of opposite conductivity type. The circuit may be protected from saturation state by a diode and from fluctuation in temperature by a further diode and a variable capacitor may be employed for effectively neutralizing the interelectrode capacitance of the electron beam tube.

REFERENCES:
patent: 2802071 (1951-08-01), Lin
patent: 3281623 (1966-10-01), Peterson et al.
patent: 3403291 (1968-09-01), Lazarchick et al.
patent: 3466390 (1969-09-01), Inamiya et al.
patent: 3585299 (1971-06-01), Boekhorst
patent: 3831057 (1974-08-01), Meyer

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