CIRCUMFERENCE OF VERTICAL TIME BASE FOR TELEVISION CATHODE-RAY TUBE

CIRCUMFERENCE OF VERTICAL TIME BASE FOR TELEVISION CATHODE-RAY TUBE

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 r...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: DOUZIECH PATRICK, SHEPHERD JOHN AVIS
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRONIC CIRCUITRY
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
PULSE TECHNIQUE
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Beschreibung
Zusammenfassung: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.