Patent ID: 8362804

Claim:
A differential signal generating device, for providing one of a differential signal output and a non-differential signal output according to a source signal and a single-ended signal, variations of the source signal being related to signal content of the single-ended signal, the differential signal generating device comprising: a control circuit, for receiving the source signal, for generating a detection result that indicates whether the source signal conforms with a first pre-defined state or a second pre-defined state, and for generating a control signal corresponding to a first mode when the detection result indicates that the source signal conforms with the first pre-defined state and corresponding to a second mode when the detection result indicates that the source signal conforms with the second pre-defined state; and a differential signal driver coupled to the control circuit for receiving the control signal therefrom, the differential signal driver further receiving the single-ended signal and comprising two output ends, wherein the differential signal driver generates a pair of complementary signals according to the single-ended signal, and outputs the differential signal output at the output ends according to the complementary signals when the control signal corresponds to the first mode, and wherein the differential signal driver outputs the non-differential signal output when the control signal corresponds to the second mode, wherein the control circuit comprises: a detecting unit, for receiving the source signal and generating the detection result; and a control unit, coupled to the detecting unit for receiving the detection result therefrom and generating the control signal.