A single-ended-to-differential converter (200) for driving an LVDS (Low Voltage Differential Signaling) driving circuit (fig. 1: 140) includes a first converting circuit (210), a second converting circuit (220), and a controller (230). The first converting circuit converts an input signal (SIN) into a first output signal (SOUT1). The first converting circuit (210) has a tunable delay time. The second converting circuit (220) converts the input signal into a second output signal. The second converting circuit (220) has a fixed delay time. The controller (230) generates a first control signal (SC1) and a second control signal (SC2) according to the first output signal (SOUT1) and the second output signal (SOUT2), so as to adjust the tunable delay time of the first converting circuit (210).