Reconfigurable bidirectional wireless charging transceiver

A bidirectional wireless power transceiver reconfigurable for performing wireless power transfer (WPT) and wireless power reception (WPR), the transceiver comprising:

• a positive-voltage node and a ground node for connecting to a positive terminal and a negative terminal, respectively, of a rechargeable battery;
• a first power input-output (IO) node and a second power IO node;
• a series resonant tank comprising a capacitor and an inductor connected in series, the inductor being used for transferring and receiving wireless power, wherein the series resonant tank has two terminals respectively connected to the first and second power IO nodes;
• a first p-type metal-oxide-semiconductor field-effect transistor (PMOS), wherein a source and a drain of the first PMOS are connected to the positive-voltage node and the first power IO node, respectively;
• a second PMOS, wherein a source and a drain of the second PMOS are connected to the positive-voltage node and the second power IO node, respectively;
• a first n-type metal-oxide-semiconductor field-effect transistor (NMOS), wherein a source and a drain of the first NMOS are connected to the ground node and the first power IO node, respectively;
• a second NMOS, wherein a source and a drain of the second NMOS are connected to the ground node and the second power IO node, respectively;
• a clock generator for generating a clock (CLK) signal and a complementary CLK (CCLK) signal;
• a first multiplexer (MUX) having an output and two inputs, the output of the first MUX coupling to a gate of the first PMOS, a first input of the first MUX coupling to the CLK signal, a second input of the first MUX coupling to the second power IO node;
• a second MUX having an output and two inputs, the output of the second MUX coupling to a gate of the second PMOS, a first input of the second MUX coupling to the CCLK signal, a second input of the second MUX coupling to the first power IO node;
• a first comparator for comparing a first voltage appeared at the first power IO node with a ground voltage appeared at the ground node;
• a second comparator for comparing a second voltage appeared at the second power IO node with the ground voltage;
• a third MUX having an output and two inputs, the output of the third MUX coupling to a gate of the first NMOS, a first input of the third MUX coupling to the CLK signal, a second input of the third MUX coupling to an output of the first comparator;
• and
• a fourth MUX having an output and two inputs, the output of the fourth MUX coupling to a gate of the second NMOS, a first input of the fourth MUX coupling to the CCLK signal, a second input of the fourth MUX coupling to an output of the second comparator,
• wherein:
• the transceiver is configured to perform WPT by connecting the output of each of the first, second, third and fourth MUXes to the first input thereof;
• and
• the transceiver is configured to perform WPR by connecting the output of each of the first, second, third and fourth MUXes to the second input thereof.