Patent ID: 7692563

Claim:
A signal transmitter for use in a multiple differential transmission system comprising the signal transmitter, a signal receiver, and a signal transmission path including first, second, and third signal lines, the signal transmission path connecting the signal transmitter to the signal receiver, the signal transmitter comprising: a first differential driver for generating a first output signal of bipolar four values including bipolar two values having a predetermined first signal voltage level and another bipolar two values having a predetermined second voltage level, and an inverted first output signal that is a phase-inverted signal from the first output signal, in response to a first bit information signal of two bits; a second differential driver for generating a second output signal of bipolar four values including bipolar two values having the first signal voltage level and another bipolar two values having the second voltage level, and an inverted second output signal that is a phase-inverted signal from the second output signal, in response to a second bit information signal of two bits; and a third differential driver for generating a third output signal of bipolar four values including bipolar two values having a predetermined third signal voltage level different from the first signal voltage level and another bipolar two values having a predetermined fourth voltage level different from the second signal voltage level, and an inverted third output signal that is a phase-inverted signal from the third output signal, in response to a third bit information signal of two bits, wherein the first output signal and the inverted third output signal are combined and transmitted to the first signal line, wherein the second output signal and the inverted first output signal are combined and transmitted to the second signal line, and wherein the third output signal and the inverted second output signal are combined and transmitted to the third signal line.