A system includes a differential circuit, multiple cross-coupled transconductance circuits. In some implementations, the differential circuit may include an inductor coil in a balun or transformer. The cross-coupled transconductance circuits may act to reduce the internal resistance of the differential circuit to increase the quality factor of the differential circuit. The cross-coupled transconductance circuit may be connected at differential points along the differential circuit and be engaged and disengaged to linearize the quality factor of the differential circuit.