Cathode ray tube deflection circuit

Details Cathode ray tube deflection circuit Cathode ray tube deflection circuit

1974-09-25

1976-12-07

Hubler, Malcolm F.

Facsimile and static presentation processing

Static presentation processing

Attribute control

315 9, 315368, H04N 909, H04N 931

Patent

active

039966119

ABSTRACT:
In a magnetically deflected cathode ray tube (CRT) display, the deflection coil is connected in series with two separate amplifiers. The first amplifier provides the main deflection current and is designed for high efficiency. The second amplifier is a linear device having relatively low efficiency and is made capable of supplying only a fraction of the output of the first amplifier. The linear amplifier is provided with deflection correction signals so that it modulates the deflection of the CRT in a desired manner. The correction signals can produce sweep linearization, convergence correction and raster shape control.

REFERENCES:
patent: 2426979 (1947-09-01), Ayres
patent: 2587420 (1952-02-01), Wendt
patent: 2621245 (1952-12-01), Kell
patent: 2654854 (1953-10-01), Seright
patent: 3305750 (1967-02-01), Schneider
patent: 3340422 (1967-09-01), Bull
patent: 3428852 (1969-02-01), Greenblum
patent: 3443147 (1969-05-01), Schneider
patent: 3613108 (1971-10-01), Spannhake
patent: 3872499 (1975-03-01), McConnell et al.

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