Patent ID: 7671630

Claim:
A high-speed universal serial bus (USB) transceiver comprising: a USB port; a first signaling circuit for providing a first output signal, the first output signal switching between a reference voltage and a ground supply voltage; a first resistor for coupling the first output signal to a first data pin of the USB port; selection logic; and a plurality of output slices, each of the plurality of output slices comprising: an output terminal coupled to the first data pin of the USB port; a high-speed switching circuit for generating a high speed data signal, the high speed data signal switching between a reference voltage and a ground supply voltage, the high speed data signal being synchronous with the first output signal; and an output resistor for coupling the high speed data signal to the output terminal, wherein the output resistor and the high-speed switching circuit in a first one of the plurality of output slices comprise the first resistor and the first signaling circuit, respectively, wherein the selection logic selectively enables a subset of the plurality of output slices to cause a total resistance of the output resistors in the subset of the plurality of output slices to be equal to a reference resistance value, and wherein the subset of the plurality of output slices includes the first one of the plurality of output slices.