| 摘要 |
A method and apparatus for generating reference voltages for a flat panel display system comprising using a digital to analog converter (DAC) 12 to supply multiple reference voltages to the flat panel display system, and wherein the DAC 12 is adapted to accept digital input voltage reference from one of a plurality of registers 14 and is adapted to provide an analog output to one of a plurality of sample and hold circuits 18. A controller 16 selects which one of the plurality of registers 14 is coupled to the DAC 12 input, and selects which one of the plurality of sample and hold circuits 18 is coupled to the DAC 12 output. A first switch 20 with a common terminal coupled to the DAC 12 input and switching terminals each coupled to one of the registers 14 selectively couples one of the registers 14 to the DAC 12 input, and a second switch 22 with a common terminal coupled to the DAC 12 output and switching terminals each coupled to one of the sample and hold circuits 18 selectively couples one of the sample and hold circuits 18 to the DAC 12 output.
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