A power converter gate driver arrangement configured to provide a power output and a switching output for switching, in use, one or more switching devices, comprising: a digital control unit configured to provide a switching control signal; and one or more isolated RF drive units configured to receive the switching control signal from the digital control unit and to output the power output and the switching output; the or each isolated RF drive unit comprising a primary side and a secondary side; the primary side comprising: oscillator means configured to generate one or more carrier frequencies; a single channel modulator configured to modulate the switching control signal onto one or more carrier frequencies; means configured to modulate a drive power signal onto a different one or more carrier frequencies a combiner (30, 60) configured to combine the modulated drive power signal and the modulated switching control signal; a single broadband resonator configured to transmit the modulated switching control signal and the modulated drive power signal; and an amplifier arranged to amplify the combined modulated switching control signal and the modulated drive power signal; and the secondary side comprising: a rectifier configured to rectify the modulated drive power signal and to provide the rectified signal to a power supply unit to provide the power output; and means (17, 18) configured to demodulate and reconstruct the modulated switching control signal to provide the switching output; wherein the power converter gate driver arrangement is further configured to maximise power transfer from the primary to the secondary side based on matched impedances and edge detection and time delay coding. a digital control unit configured to provide a switching control signal; and one or more isolated RF drive units configured to receive the switching control signal from the digital control unit and to output the power output and the switching output; the or each isolated RF drive unit comprising a primary side and a secondary side; the primary side comprising: oscillator means configured to generate one or more carrier frequencies; a single channel modulator configured to modulate the switching control signal onto one or more carrier frequencies; means configured to modulate a drive power signal onto a different one or more carrier frequencies a combiner (30, 60) configured to combine the modulated drive power signal and the modulated switching control signal; a single broadband resonator configured to transmit the modulated switching control signal and the modulated drive power signal; and an amplifier arranged to amplify the combined modulated switching control signal and the modulated drive power signal; and the secondary side comprising: a rectifier configured to rectify the modulated drive power signal and to provide the rectified signal to a power supply unit to provide the power output; and means (17, 18) configured to demodulate and reconstruct the modulated switching control signal to provide the switching output; oscillator means configured to generate one or more carrier frequencies; a single channel modulator configured to modulate the switching control signal onto one or more carrier frequencies; means configured to modulate a drive power signal onto a different one or more carrier frequencies a combiner (30, 60) configured to combine the modulated drive power signal and the modulated switching control signal; a single broadband resonator configured to transmit the modulated switching control signal and the modulated drive power signal; and an amplifier arranged to amplify the combined modulated switching control signal and the modulated drive power signal; and the secondary side comprising: a rectifier configured to rectify the modulated drive power signal and to provide the rectified signal to a power supply unit to provide the power output; and means (17, 18) configured to demodulate and reconstruct the modulated switching control signal to provide the switching output; a rectifier configured to rectify the modulated drive power signal and to provide the rectified signal to a power supply unit to provide the power output; and means (17, 18) configured to demodulate and reconstruct the modulated switching control signal to provide the switching output; wherein the power converter gate driver arrangement is further configured to maximise power transfer from the primary to the secondary side based on matched impedances and edge detection and time delay coding.