Patent ID: 7522670

Claim:
A transmission circuit for transmitting a digital signal to one or more interface conductors, comprising: an output driver having a differential input for receiving a differential input signal pair and one or more outputs coupled to said one or more interface conductors; a pair of pre-driver circuits each having an output coupled to an associated signal of said differential input signal pair; a control circuit for selectively disabling power supplied to at least one of said pre-driver circuits in response to a low-power selection state of a control signal, whereby power consumption of said transmission circuit is reduced while transmitting data through said output driver, wherein said control circuit disables at least a portion of both of said pair of pre-driver circuits in response to said low-power selection state of said control signal; and a single-ended to differential signal converter having an output coupled to an input of said output driver, and wherein said control circuit disables power supplied to said single-ended to differential signal converter when said control circuit enables said pair of pre-driver circuits in response to a high-power selection state of said control signal.