Patent ID: 7317453

Claim:
A signal generator for generating video graphics array color signals, the signal generator comprising: a field program gate array device for generating horizontal sync frequencies and vertical sync frequencies according to a video graphics array mode selected by a user, and for generating digital signals on red-green-blue color according to a display pattern selected by the user; a pixel clock generator for outputting pixel clocks at a frequency continuously to the field program gate array device; a phase locked loop for generating required pixel clock frequencies, and outputting the pixel clock frequencies to the field program gate array device; a programmable read only memory for storing configuration files for starting the field program gate array device; a digital/analog convertor for converting the digital signals on red-green-blue color from the field program gate array device to analog signals; and a video graphics array interface for obtaining the horizontal sync frequencies and the vertical sync frequencies from the field program gate array device, and outputting video graphics array color signals.