David Allen Wolff - Schaumburg IL Walter Kowalski - Franklin Park IL
Assignee:
Motorola, Inc. - Schaumburg IL
International Classification:
H01J 2970
US Classification:
315 85
Abstract:
Circuitry utilizing either composite sync or separated sync data provides self-stepping capability for the vertical scan of a CRT alphanumeric display. A counter counts horizontal sync pulses for varying the vertical scan rate between rows of characters in steps, and is synchronized with the beginning of each frame by the vertical sync pulse. Alphanumeric data can be displayed with any desired spacing between rows without change of character format and with minimum effect on the size of the displayed characters.