Patent ID: 9746531
Date: 2017-08-29
CPC Classifications: G01R,G06F,H01L

Claim:
1. A magnetic sensor circuit comprising: a plurality of hall elements equipped with a plurality of terminals; a first switch circuit between the terminals of the hall elements, and a power supply terminal and a ground terminal and configured to supply driving currents to the hall elements; a second switch circuit connected to the terminals of the hall elements and configured to select and output signals of the hall elements; a first control circuit that outputs a first control signal to the first switch circuit; a second control circuit that outputs a second control signal to the second switch circuit; and a signal processing circuit configured to process signals in response to an output signal from the second switch circuit, wherein the first control circuit is configured to control the hall elements such that a timing at which spikes occur in the output signals of the plurality of hall elements are different from each other, wherein the second control circuit is configured to control the second switch circuit such that the second switch circuit does not select an output signal having a predetermined period during in which spikes occur, among the output signals of the hall elements, and to select an output signal having a predetermined period free of spikes among the output signals of the hall elements, and wherein at least one output signal of the plurality of hall elements is selected and output during all periods as the output signal of the second switch circuit.