A circuit is provided which generates a first output signal and a second output signal. The circuit includes a reference signal input having a reference value, a first positioning circuit, and a second positioning circuit. The first positioning circuit generates the first output signal responsive to a first differential input signal and the reference signal, and the second positioning circuit generates the second output signal responsive to a second differential input signal and the reference signal. In one implementation, the positioning circuits may be reversed peak detectors. A minimum value of the first output signal and a minimum value of the second output signal are positioned along a common axis at values greater than or equal to the reference value.