Aspects of the present disclosure provide a low power differential frequency multiplier. An example frequency multiplier circuit generally includes a first set of transistors, a second set of transistors, and a resonant circuit. The first set of transistors comprises a first transistor and a second transistor, wherein each of the transistors in the first set is a first type of transistor. The second set of transistors comprises a third transistor and a fourth transistor, wherein each of the transistors in the second set is a second type of transistor. The resonant circuit has a first terminal coupled to the first set of transistors and a second terminal coupled to the second set of transistors, wherein the resonant circuit comprises an inductive element and a capacitive element coupled in parallel with the inductive element.