1. An apparatus for converting a differential input signal having a first component and a second component to a single output signal, said output signal having the same binary information as said input signal, said apparatus comprising: a first pair of transistors providing a first differential current; a second pair of transistors providing a second differential current; a combiner for providing a single intermediate signal which is related to the difference between said first and second differential currents; a signal distributor for forwarding said differential input signal to said first pair of transistors when an average magnitude of said first and second components is in a first magnitude range, and for forwarding said differential signal to said second pair of transistors when said average magnitude is in a second, different magnitude range, and an output trigger for receiving said single intermediate signal to provide said output signal.