Patent ID: 6944239

Claim:
A Complementary Metal Oxide Semiconductor (CMOS) bi-directional current mode differential link comprising: a CMOS driver receiving a data input and having an output coupled to a transmission line; a CMOS replica driver receiving said data input and providing a replica driver output substantially equal to said CMOS driver output; a CMOS receiver coupled to both said transmission line and replica driver output; said CMOS receiver comprising a resistor summing network and a differential amplifier; resistor summing network comprises: a first resistor, a first end of said first resistor being coupled to positive phase output node of said CMOS driver; a second resistor, a first end of said second resistor being coupled to a second end of said first resistor, and a second end of said second resistor being coupled to a negative phase output of said replica driver; a third resistor, a first end of said third resistor being coupled to a negative phase output of said CMOS driver; and a fourth resistor, a first end of said fourth resistor being coupled to a second end of said third resistor, and a second end of said fourth resistor being coupled to a positive phase output of said replica driver; and said CMOS driver and said CMOS replica driver including a plurality of parallel current sources; each of said current sources being arranged to send positive or negative current through a load responsive to an applied control signal.