Patent ID: 6052105
Filing Date: 2000-04-18
Classification: G09G

Abstract:
A wave generation circuit generating a drive control signal, comprising:a ROM storing waveform data relating to a waveform and the generation of the waveform for each cycle;an address generation circuit sequentially generating address signals for sequentially reading said waveform data;a waveform data output circuit reproducing said read waveform data sequentially into a waveform signal, wherein said waveform data includes extension information for instructing to reproduce the waveform data in extension for a particular cycle; andan extension decision and control circuit for deciding on the presence or absence of said extension information from said read waveform data and, in the presence of said extension information, controlling said waveform data output circuit to maintain the output of a corresponding waveform signal while at the same time controlling said address generating circuit to retard the generation of the address signal.