Patent ID: 7705632

Claim:
A driver circuit, comprising: a signal input connection; a plurality of individual drivers including a first individual driver and a second individual driver, wherein each of the first and second individual drivers has an input and an output, and wherein: the input of the first individual driver is connected to the signal input connection; the output of the first individual driver is connected to the input of the second individual driver; and the output of the second individual driver is connected to a signal output; and a signal tap located between the output of the first individual driver and the input of the second individual driver; wherein the signal input connection, the signal output, and the first and second individual drivers are located on a common semiconductor chip; wherein the first and second individual drivers are individually selectable so that: if both the first and second individual drivers are selected, a signal will be driven via the signal output by both the first and second individual drivers; and if only the first individual driver is selected, the signal will be driven via the signal tap; and wherein the signal driven via the signal output and the signal driven via the signal tap are at different levels.