An animal feeder apparatus includes a food storage hopper which includes a top hopper portion and a bottom hopper portion. A source and a drain of the junction field-effect transistor are comprised of a semiconductor material grown by selective epitaxy and in direct contact with a top surface of a semiconductor layer. Selective etching will attack the SiC layer while leaving the SiON layer undisturbed. In the communication mode, multiple transmission signals are corrected by using the correction value acquired in a calibration mode, and the corrected signals are output.