Line scan circuits for cathode ray tube displays

Details Line scan circuits for cathode ray tube displays Line scan circuits for cathode ray tube displays

1979-10-01

1981-08-11

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

358148, H01J 2970, H01J 2972

Patent

active

042836620

ABSTRACT:
A line scan circuit for a cathode ray tube display includes a phase detector (3), integrator (4), voltage controlled oscillator (5) and line output stage (6). The integrator, voltage controlled oscillator and line output stage are conventional, but the phase detector is novel. The phase detector compares the phase difference for both the leading and trailing edges of the horizontal synchronization pulses and the line flyback pulses. This forces the line flyback pulses to be centered with respect to the synchronization pulses resulting in improved centering and linearity of the displayed picture.

REFERENCES:
patent: 3979640 (1976-09-01), Fischman et al.
patent: 4028729 (1977-06-01), Browder

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