Electronic circuit, module, and system

An electronic circuit, comprising:

• a switch connected between a power supply configured to output direct current (DC) electric power and a load driven by DC electric power supplied from the power supply and configured to switch a connection state between the power supply and the load to any of a conduction state in which a supply of electric power from the power supply to the load is allowed and a non-conduction state in which the supply of electric power from the power supply to the load is cut off,
• a first antenna capable of receiving radio waves;
• a second antenna capable of receiving radio waves;
• a first power conversion circuit including a first power input terminal to which electric power obtained when the first antenna receives radio waves is input and a first DC power output terminal configured to output DC electric power and configured to convert electric power input to the first power input terminal into DC electric power and output the converted DC electric power from the first DC power output terminal;
• a second power conversion circuit including a second power input terminal to which electric power obtained when the second antenna receives radio waves is input and a second DC power output terminal configured to output DC electric power and configured to convert electric power input to the second power input terminal into DC electric power and output the converted DC electric power from the second DC power output terminal;
• and
• a control circuit including a first input terminal connected to the first DC power output terminal of the first power conversion circuit, a second input terminal connected to the second DC power output terminal of the second power conversion circuit, and an output terminal connected to the switch and configured to control the connection state of the switch, and configured to switch the connection state of the switch when a difference between electric power input from the first input terminal and electric power input from the second input terminal is larger than a predetermined value.