Magnetic resonance coupling wireless charging device based on differential structure

A magnetic resonance coupling (MRC) wireless charging device based on a differential structure, comprising a magnetic resonance transmitter module and a magnetic resonance receiver module communicatively connected to the magnetic resonance transmitter module, wherein

• the magnetic resonance transmitter module comprises a differential amplifier circuit, a plurality of transmitter-side differential filter circuits, a transmitter-side differential matching circuit and a transmitter coil, wherein the differential amplifier circuit, the plurality of transmitter-side differential filter circuits, the transmitter-side differential matching circuit and the transmitter coil are sequentially and communicatively connected;
• the magnetic resonance receiver module comprises a receiver coil, a receiver-side differential matching circuit, a plurality of receiver-side differential filter circuits and a current-doubler rectifier circuit, wherein the receiver coil, the receiver-side differential matching circuit, the plurality of receiver-side differential filter circuits and the current-doubler rectifier circuit are sequentially and communicatively connected;
• and
• the transmitter coil is communicatively connected to the receiver coil,
• wherein the differential amplifier circuit comprises a first inductor, a second inductor, a third inductor, a fifth inductor, a sixth inductor, a seventh inductor, a first ground capacitor, a second ground capacitor, a fourth ground capacitor, a sixth ground capacitor, a seventh ground capacitor, an eighth ground capacitor, a ninth ground capacitor, a fourteenth ground capacitor, a fifteenth ground capacitor, a sixteenth capacitor, an eighteenth ground capacitor, a nineteenth ground capacitor, a twentieth ground capacitor, a twenty-first ground capacitor and a first metal oxide semiconductor (MOS) transistor, a second MOS transistor;
• the first MOS transistor comprises a gate connected to a first differential drive input signal and a first source grounded;
• wherein a drain of the first MOS transistor is respectively connected to a first terminal of the first inductor, the sixth ground capacitor, the seventh ground capacitor and a first terminal of the second inductor;
• a second terminal of the first inductor is respectively connected to the first ground capacitor and the second ground capacitor, with first junctions being further connected to a radio-frequency voltage common collector (RFVCC) power supply;
• a second terminal of the second inductor is connected to a first terminal of the fourth capacitor;
• a second terminal of the fourth capacitor is connected to a first terminal of the third inductor;
• and a second terminal of the third inductor is respectively connected to the eighth ground capacitor and the ninth ground capacitor, with second junctions being further connected to the plurality of transmitter-side differential filter circuits;
• and
• the second MOS transistor comprises a gate connected to a second differential drive input signal and a second source grounded;
• wherein a drain of the second MOS transistor is respectively connected to a first terminal of the fifth inductor, the eighteenth ground capacitor, the nineteenth ground capacitor and a first terminal of the sixth inductor;
• a second terminal of the fifth inductor is respectively connected to the fourteenth ground capacitor and the fifteenth ground capacitor, with third junctions being further connected to the RFVCC power supply;
• a second terminal of the sixth inductor is connected to a first terminal of the sixteenth capacitor;
• a second terminal of the sixteenth capacitor is connected to a first terminal of the seventh inductor;
• and a second terminal of the seventh inductor is respectively connected to the twentieth ground capacitor and the twenty-first ground capacitor, with fourth junctions being further connected to the plurality of transmitter-side differential filter circuits.