Abstract: A precharge method for a data driver includes steps of: outputting a display data to a plurality of output terminals of the data driver; outputting a second precharge voltage to an output terminal among the plurality of output terminals prior to outputting the display data to the output terminal, to precharge the output terminal to a voltage level closer to an output voltage; and outputting a first precharge voltage to the output terminal prior to outputting the second precharge voltage. The first precharge voltage provides a faster voltage transition on the output terminal than the second precharge voltage.

Abstract: A testing method includes selecting a low-pass filter by simulation, generating testing signals with the low-pass filter receiving output signals of an under-test circuit, and outputting the testing signals to an input of the under-test circuit for predetermined measurements. A testing circuit and testing method achieve the same jitter injection as conventional high-speed testing instruments, but save testing cost.

Abstract: A testing method includes selecting a low-pass filter by simulation, generating testing signals with the low-pass filter receiving output signals of an under-test circuit, and outputting the testing signals to an input of the under-test circuit for predetermined measurements. A testing circuit and testing method achieve the same jitter injection as conventional high-speed testing instruments, but save testing cost.