Analog switch and multiplexer

The analog switch includes a first DMOS transistor of a second conductivity type that is connected to an input terminal at a first end of a current path thereof and to the gate of the first MOS transistor at a second end of the current path, and is controlled in accordance with the second current. The analog switch includes a second DMOS transistor of the second conductivity type that is connected to the second end of the current path of the first DMOS transistor at a first end of a current path thereof and to an output terminal at a second end of the current path and is controlled in accordance with the second current. The analog switch includes a first switch element that is connected between a gate and the second end of the current path of the first DMOS transistor. 模拟开关具备电流路径的端连接在输入端子上、上述电流路径的另端与上述第1MOS晶体管的栅极连接、受上述第2电流控制的第2导电型的第1DMOS晶体管。模拟开关具备电流路径的端连接在上述第1DMOS晶体管的电流路径的另端上、上述电流路径的另端连接在输出端子上、受上述第2电流控制的第2导电型的第2DMOS晶体管。模拟开关具备连接在上述第1DMOS晶体管的栅极与电流路径的另端之间的第1开关元件。