Patent ID: 8653853

Claim:
An integrated circuit comprising a differential interface, wherein the differential interface comprises: a driver circuit comprising an input to receive a single-ended input signal and outputs to output differential output signals, the driver circuit to receive a first power supply voltage and a first ground voltage in a first power supply domain in the integrated circuit, wherein the driver circuit further comprises a first current mode logic circuit, wherein the first current mode logic circuit comprises first and second transistors, wherein a drain of the first transistor is coupled to a first resistor, wherein a drain of the second transistor is coupled to a second resistor, wherein the first resistor is coupled to the second resistor, and wherein a source of the first transistor is coupled to a source of the second transistor and to a current source; and a receiver circuit comprising inputs to receive the differential output signals of the driver circuit and an output to output a single-ended output signal, the receiver circuit to receive a second power supply voltage and a second ground voltage in a second power supply domain in the integrated circuit, wherein the first and the second power supply domains are electrically isolated from each other in the integrated circuit, and wherein the driver circuit and the receiver circuit are in the integrated circuit, wherein the receiver circuit further comprises a second current mode logic circuit having differential inputs coupled to differential outputs of the first current mode logic circuit, wherein the second current mode logic circuit comprises third and fourth transistors, wherein a drain of the third transistor is coupled to a third resistor, wherein a drain of the fourth transistor is coupled to a fourth resistor, wherein the third and the fourth resistors are coupled to a node at the second power supply voltage, and wherein a source of the third transistor is coupled to a source of the fourth transistor.