Patent ID: 9680466
Date: 2017-06-13
CPC Classifications: H03K

Claim:
1. An analog switch comprises: a first current source that is connected to a first potential at a first end thereof and is driven to pass a first current; a second current source that is connected to the first potential at a first end thereof and is driven to pass a second current; a first resistor that is connected to a second end of the first current source at a first end thereof; a second resistor that is connected to a second end of the second current source at a first end thereof; a first MOS transistor of a first conductivity type that is connected to a second end of the first resistor at a first end of a current path thereof and to a second potential at a second end of the current path; a second MOS transistor of the first conductivity type that is connected to a second end of the second resistor at a first end of a current path thereof, to the second potential at a second end of the current path, and to a gate of the first MOS transistor at a gate thereof; 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; 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; and a first switch element that is connected between a gate and the second end of the current path of the first DMOS transistor and is controlled in accordance with the first current.