Fast retrace circuit for a deflection amplifier in a cathode ray

Details Fast retrace circuit for a deflection amplifier in a cathode ray Fast retrace circuit for a deflection amplifier in a cathode ray

1987-09-28

1989-04-11

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315389, H01J 2970, H01J 2972

Patent

active

048209600

ABSTRACT:
A method and apparatus for the fast retrace of the electron beam in a cathode ray tube are disclosed. A deflection signal is presented to a cathode ray tube deflection system upon the detection of the end of the retrace period of the deflection signal so that a cathode ray tube electron beam can scan across the screen of the cathode ray tube. Upon detecting the beginning of the retrace period of the deflection signal, a forcing signal is presented to the cathode ray tube deflection system. The presenting of the forcing signal to the deflection system quickly reverses the direction of the current flow through the deflection system and allows for the electron beam to slew to its initial position and settle before the end of the normal retrace period.

REFERENCES:
patent: 4547711 (1985-10-01), Gehrmann
patent: 4677352 (1987-06-01), Sibovits et al.

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