Abstract: This invention provides a phase splitter device that generates in-phase and quadrature outputs that have a phase difference of substantially a phase set value (e.g., 90°) and an amplitude difference of substantially an amplitude set value (e.g., zero). A first feedback loop controls the phase difference between the in-phase and the quadrature outputs while a second feedback loop controls the amplitude difference between the in-phase and quadrature outputs. The phase splitter device controls the amplitude difference and the phase difference between the in-phase and the quadrature outputs by a common mode of control signals and a differential between the control signals, respectively. In this way, the phase splitter device generates in-phasing and quadrature outputs that have a phase difference and an amplitude difference that is substantially equal to the amplitude and phase set values (e.g., zero and 90°) using a single set of control signals.