Frequency multiplier circuitry, corresponding system and vehicle

A circuit comprising:

• frequency multiplier circuitry having input nodes configured to receive an input signal and an anti-phase version thereof, the input signal having a first frequency value, wherein the frequency multiplier circuitry is configured to produce a current signal at a second frequency value that is an even multiple of the first frequency value;
• a transformer comprising a primary side and a secondary side, wherein the primary side comprises a primary inductance coupled to the frequency multiplier circuitry to receive the current signal therefrom, wherein the secondary side is configured to provide a frequency multiplied voltage signal, and wherein the frequency multiplier circuitry and the transformer are cascaded between at least one first node and a second node, the at least one first node and the second node couplable to a supply node and ground;
• a first shunt resonator coupled between the supply node and the at least one first node;
• a second shunt resonator coupled between the second node and the ground;
• and
• a bypass current path coupled between the at least one first node and the second node.