A new method and package for the mounting of semiconductor devices. The third transistor is switched on and off based on its gate voltage dependent upon a signal value written to a capacitor and a ramp signal voltage. Image data corresponding to the physical quantities measured at the different positions in the xy plane is then generated. In another embodiment, the cradle end includes a loop and a ball to grasp the sound post. The signals from the decoder circuit 4 are fed to an adder 12 which is an adder means through an amplifier 11 which is a weighting circuit having a coefficient of, for example, 0.