Patent ID: 6980020

Claim:
An integrated circuit die comprising: a. a current source having a plurality of calibration-current output nodes providing a corresponding plurality of calibration currents; b. a plurality of multi-channel communication circuits, each communication circuit including: i. a first calibration-circuit input node coupled to a respective one of the calibration-current output nodes and receiving one of the calibration currents; ii. a second calibration-circuit input node coupled to a reference resistor; iii. a calibration-circuit output port providing a termination-control signal; and iv. a plurality of termination elements, each termination element exhibiting a termination characteristic and including a termination control port coupled to the calibration-circuit output port and receiving the termination-control signal; c. a plurality of pads, each pad coupled to a corresponding one of the termination elements and adapted to convey signals between the die and a communication channel; and d. wherein the communication channel comprises a signal-line pair.