Abstract: To provide a moving body that is capable of more flexible movement. Provided is a moving body including four or more legs that have wheels at ends thereof and are able to be controlled along two or more axes, and a body supported at the four or more legs, in which the four or more legs include two or more front wheel legs that are capable of swinging forward in an advancing direction of the body, and two or more rear wheel legs that are capable of swinging backward in the advancing direction of the body, and the front wheel legs and the rear wheel legs are capable of swinging to such positions that the wheels overlap one another in a direction orthogonal to the advancing direction.

Abstract: The invention is provided to improve the power efficiency of a power amplifier circuit of a wireless communication system having an output transistor that operates in saturation operation mode and linear operation mode. The invention provides an electronic apparatus (module) used for a wireless communication system in which at least an output power amplifiers and an impedance matching circuit are mounted on one insulating substrate and the impedance of the output terminal of the impedance matching circuit is set to 50&OHgr;, wherein a switching circuit that changes the circuit constant of the impedance matching circuit or the high frequency impedance value in view of the impedance matching circuit side from the output power amplifier depending on the operation condition is provided at the point of the impedance lower than the impedance of the output terminal in the impedance marching circuit.