Patent ID: 8669782

Claim:
A biasing circuit for a differential driver, the biasing circuit comprising: a pre-driver circuit configured to generate a differential output signal, wherein each portion of the differential output signal is intended to be operatively coupled to gates of first and second source-coupled transistors of the differential driver, wherein each portion of the differential output signal has a single-ended voltage swing from a first voltage level to a second voltage level for deactivating and for activating, respectively, the first and second source-coupled transistors of the differential driver, wherein the pre-driver circuit is configured to receive an adjustment signal as a reference input for the second voltage level; and a replica transistor circuit in an open-loop circuit configuration having a replica transistor configured to be biased into a saturation region, wherein a gate voltage of the replica transistor circuit is operatively coupled to the pre-driver circuit as the adjustment signal, such that the second voltage level is adjusted to bias the activated one of the first or second source-coupled transistor of the differential driver into the saturation region and not to a triode or linear region.