| abstract |
A bidirectional switch is realized which does not require a diode connected in series and has low on-resistance and low power loss. A bidirectional switch includes a first FET 11, a second FET 12, and a conduction state in which a current from a bidirectional power source electrically connected between drain terminals flows in both directions and a current flows. And a switch control unit 21 for controlling the non-blocking state. The switch control unit 21 is based on the potential of the node 13 in which the source terminal of the first FET 11 and the source terminal of the second FET 12 are connected to the gate terminals of the first FET 11 and the second FET 12 in the conductive state. A voltage higher than the threshold voltage is applied, and in a cut-off state, the bidirectional power supply and each gate terminal are electrically insulated, and a voltage equal to or lower than the threshold voltage is applied with reference to the potential of the node 13. [Selection] Figure 1 |