FLUXGATE TYPE MAGNETISM DETECTING APPARATUS, ESPECIALLY REDUCING POWER CONSUMPTION AND A LAYOUT AREA

摘要

PURPOSE: A fluxgate type magnetism detecting apparatus is provided to elongate an operation duration of the apparatus by reducing power consumption. CONSTITUTION: A fluxgate type magnetism detecting apparatus includes a pulse generator, a pulse limiter(110), a pulse amplifier(120), a fluxgate(140), a signal processor, and a controller. The pulse limiter switches the pulse outputted from the pulse generator. The pulse amplifier inverted and non-inverted amplifies the outputted pulse from the pulse limited and outputs the results. The fluxgate generates a detection signal according to an electromotive power generated by the inverted and non-inverted amplified results. The signal processor processes the detection signal at low frequencies. The controller controls the pulse limited to prevent a pulse from being delivered to the fluxgate from the pulse generator when a predetermined time elapses after the processed detection signal reaches a threshold value.