Television vertical timebase circuit

Details Television vertical timebase circuit Television vertical timebase circuit

1994-10-06

1997-02-25

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315395, H01J 2970, H01J 2976

Patent

active

056062281

ABSTRACT:
A television vertical timebase circuit includes an arrangement (10, 25, 30, 35, 40, 45) for generating a vertical ramp voltage of first and second slopes corresponding to 4:3 and 16:9 aspect ratios. An arrangement (50,55,65) adds a predetermined voltage to a predetermined portion of the 16:9 ratio ramp voltage such that unwanted visible signals are positioned outside the visible screen area when displaying 16:9 aspect ratio pictures.

REFERENCES:
patent: 5359267 (1994-10-01), Wilber
patent: 5442406 (1995-08-01), Altmanshofer et al.

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