| 摘要 |
An output buffer for a gray-scale voltage source adapted to a flat panel display such as a liquid crystal display is provided. The gray-scale voltage source provides a reference voltage for converting digital data into corresponding gray-scale voltages. The output buffer comprises a differential amplifier, a power amplifier and a feedback network. The positive input terminal of the differential amplifier is coupled to the gray-scale voltage source. The negative input terminal of the differential amplifier is coupled to a second terminal of the feedback network. The output terminal of the differential amplifier is coupled to the input terminal of the power amplifier. The output terminal of the power amplifier is coupled to a first terminal of the feedback network. The output terminal of the power amplifier also outputs the voltage from the buffered gray scale voltage source to serve as the reference voltage.
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