Patent ID: 8279206

Claim:
A differential signaling system comprising: a first wiring and a second wiring connected between a sending end and a receiving end as a differential signal line; a termination resistor connected between the first wiring and the second wiring in the receiving end side; and a programmable compensation circuit connected to the termination resistor in parallel, the programmable compensation circuits includes: n switches M 1 , M 2 , M 3 , . . . , Mn connected between a first power line and a second power line; first n resistors R 11 , R 12 , R 13 , . . . , R 1 n connected between a source electrode of each of the switches and a first wiring; second n resistors R 21 , R 22 , R 23 , . . . , R 2 n connected between a drain electrode of each of the switches and a second wiring; third n resistors Rd 1 , Rd 2 , . . . , Rdn connected between the first power line and a source electrode of each of the switches; and fourth n resistors Rs 1 , Rs 2 , . . . , Rsn connected between the second power line and a drain electrode of each of the switches.