Patent ID: 7339210

Claim:
A compound semiconductor switching circuit device comprising: two or more switching elements formed on a compound semiconductor substrate, each of the switching elements comprising at least one gate, a signal input portion and a signal output portion; a common input terminal pad formed on the substrate and connected with the signal input portions of the switching elements; an output terminal pad provided for each of the switching elements and connected with a corresponding signal output portion, the output terminal pads being formed on the substrate; a control terminal pad provided for each of the switching elements and connected with a corresponding gate, the control terminal pads being formed on the substrate; a connection wiring formed on the substrate and connecting the common input terminal pad and one of the signal input portions; and a connecting path connecting one of the control terminal pads and a corresponding gate, wherein the connecting path intersects the connection wiring and comprises a high resistance element that has a resistance higher than an average resistance of the connecting path and is disposed between the control terminal pad with which the connecting path is connected and the intersection between the connecting path and the connection wiring.