In a thin film transistor, a mask is formed on a gate electrode, and a porous anodic oxide is formed in both sides of the gate electrode using a relatively low voltage. A receiving end has a canceling filter section that alleviates the inter-carrier interference caused by the frequency fluctuations, the amplitude fluctuations, the phase fluctuations, or the like through filtering processing. The measuring voltage of the sensor element is controlled depending on at least one actual operating parameter of the diesel engine. The mixture of material is deposited overlying a surface region of a substrate member.