Patent ID: 7512183

Claim:
A driver circuit for transmitting a differential logic signal over transmission lines comprising: a differential circuit having a first input coupled to a first data signal, a second input coupled to a second data signal, a first driver output with a first source resistance coupled to an input of a first transmission line and generating a first output signal, and a second driver output with a second source resistance coupled to an input of a second transmission line and generating a second output signal, wherein the first output signal is a difference between the first and second data signals amplified with a compensated gain, and the second output signal is a complement of the first output signal, wherein the differential circuit comprises a first stage having the first input coupled to the first data signal, the first driver output and a first bias terminal coupled to a first current source setting a bias current for the first stage, wherein the differential circuit further comprises a second stage having the second input coupled to the second data signal, the second driver output and a second bias terminal coupled to a second current source setting the bias current for the second stage; and a driver compensation network coupled to the differential circuit for setting the compensated gain to have a maximum gain value for frequencies greater than a first frequency, attenuating the maximum gain value of the differential circuit to a minimum gain value at frequencies below a second frequency substantially lower than the first frequency, and setting the compensated gain of the amplifier to transition between the minimum and maximum gain values at frequencies between the first and second frequencies, wherein the compensation network is coupled between the first bias terminal of the first stage and the second bias terminal of the second stage.