| 摘要 |
A data transmission circuit includes a first signal transmission unit and a second signal transmission unit. The first signal transmission unit includes a driving unit having a plurality of driving devices used for driving and outputting an output signal at different logic levels according to driving signals. A driving signal generating unit selectively activates the driving signals using the input signal and according to control signals. A control unit generates the control signals using the current output signal which is fed back to the control unit, and the control signals are generated according to an enable signal. In the data transmission circuit, the current output signal is latched so that the driving devices only need to be activated when the desired signal is not latched. Thus the data transmission circuit can reduce current consumption and increase transmission speed.
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