Abstract: The present embodiment relates to a Hall electromotive force signal detection circuit. The third switch circuit selects a terminal position for applying a driving current out of four terminals of the third Hall element and switches the terminal position among the first terminal, the second terminal, the fourth terminal, and the third terminal in this order. The fourth switch circuit switches a terminal position for applying the driving current to the terminal in turn, among the first to the fourth terminal of the fourth Hall element, such that this terminal position is different from that selected by the third switch circuit and faces the terminal position for injecting the driving current in the third Hall element. A chopper clock generation circuit supplies a chopper clock signal with different four phases to the third switch circuit and to the fourth switch circuit.

Abstract: A Hall electromotive force signal detection circuit suppresses variations of spike-like error signals that become obstacles to high-precision detection of Hall electromotive force signals. To this end, in the Hall electromotive force signal detection circuit driving plural Hall elements by spinning current techniques and using plural transconductance amplifiers, a reference signal Vcom is supplied from a feedback network controller to a Hall signal feedback network that performs a feedback control so that common voltages of Hall electromotive force signals from the plural Hall elements match with the reference signal Vcom and to an output signal feedback network that feeds back a voltage obtained by dividing a difference between an output voltage and the reference signal Vcom. In this manner, the variations of spike signals are suppressed.

Abstract: The present embodiment relates to a Hall electromotive force signal detection circuit. The third switch circuit selects a terminal position for applying a driving current out of four terminals of the third Hall element and switches the terminal position among the first terminal, the second terminal, the fourth terminal, and the third terminal in this order. The fourth switch circuit switches a terminal position for applying the driving current to the terminal in turn, among the first to the fourth terminal of the fourth Hall element, such that this terminal position is different from that selected by the third switch circuit and faces the terminal position for injecting the driving current in the third Hall element. A chopper clock generation circuit supplies a chopper clock signal with different four phases to the third switch circuit and to the fourth switch circuit.