Multi-standard, automatic impedance controlled driver with supply regulation

A method for regulating an output impedance of a driver, the method comprising:

• generating a driver bias signal based on a swing command, a driver impedance characteristic, and an input signal;
• adjusting a swing and an output impedance of a driver based at least in part on the driver bias signal;
• and
• outputting a driver signal having the swing and the output impedance based at least in part on said adjusting,
• wherein the driver bias signal is automatically adjusted such that the output impedance of the driver is varied to match an impedance of a given line.

An apparatus comprising:

• means for generating a driver bias signal based on a swing command, a driver impedance characteristic, and an input signal;
• means for adjusting a swing and an output impedance of a driver based at least in part on the driver bias signal;
• and
• means for outputting a driver signal having the swing and the output impedance based at least in part on said adjusting,
• wherein the means for generating the driver bias signal automatically adjusts the driver bias signal such that the output impedance of the driver is varied to match an impedance of a given line.