Patent ID: 7786751

Claim:
A differential signaling system comprising: a driver circuit for transmitting a differential signal; and a receiver circuit for receiving the differential signal, wherein at least two signal lines are used for the differential signal to be transmitted by the driver circuit and received by the receiver circuit; and wherein the driver circuit includes: a flip flop circuit which outputs two signals which have mutually different phases; a first time delay circuit which receives one of the two signals from the flip chip circuit and which variably controls a delay time of the received signal; a second time delay circuit which receives the other of the two signals output from the flip chip circuit and which variably controls a delay time of the received signal; a first amplifier which receives an output from said first time delay circuit; a second amplifier which receives an output from said second time delay circuit; a first output buffer which receives an output from the first amplifier; a second output buffer which receives an output from the second amplifier; a first output pin which receives an output from the first output buffer; and a second output pin which receives an output from the second output buffer, wherein said first time delay circuit and said second time delay circuit are adjustable in time lag between a waveform output from the first output pin and a waveform output from the second output pin so as to cancel skew between the signal lines.