Selectable single mode or differential mode operation in a single amplifier

An amplifier having dual modes of operation, comprising:

• a first differential amplifier receiving a first pair of differential input signals and having a first output terminal;
• a second differential amplifier receiving a second pair of differential input signals and having a second output terminal;
• and
• circuitry for coupling the first and second differential amplifiers and controlled by a control signal, wherein a first value of the control signal activates the circuitry so that the first and second differential amplifiers provide a differential signal at the first and second output terminals in response to the first and second pair of differential input signals, and wherein a second value of the control signal deactivates the circuitry so that the first and second differential amplifiers operate independently to provide single ended signals at the first and second output terminals in response to the first and second pair of differential input signals, respectively.