Mutual inductance from an external output signal system to an external input signal system, in which parallel inputoutput operation is enabled, is reduced. According to the proposal, a particularly simple yet accurate method is provided for determining the correction value \u03bbk for the lambda center position \u03bbm. Axially spacing the input shaft from the first and second output shafts also can allow for an increased diameter of the first and second output shafts without necessitating a corresponding increase in the diameter of the dual clutch mechanism. A pair of outer hinge brackets are attached to the ends of the elongated base member. Because the excitation inductor is saturated for part of the cycle it may be much smaller than heretofore and have a smaller power supply. First, a sacrificial layer portion interposed between a channel layer portion and an uppermost surface of a semiconductor substrate having trenches is laterally recessed to provide a lateral recess on each side of the sacrificial layer portion.