Hall electromotive force signal detection circuit, current sensor thereof, and hall element driving method
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United States of America Patent
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Mar 20, 2018
Issued Date -
N/A
app pub date -
Jan 17, 2014
filing date -
Mar 28, 2013
priority date (Note) -
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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.
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