SEMICONDUCTOR INTEGRATED CIRCUIT FOR DETECTING MAGNETIC FIELD
First Claim
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1. A semiconductor integrated circuit for detecting a magnetic field comprising:
- a magneto-electric conversion element for detecting the magnetic field and converting a detected magnetic field to an electric signal;
a conductive pattern for flowing a test current therethrough, the conductive pattern disposed around the magneto-electric conversion element;
a detection element for detecting the electric signal of the magneto-electric conversion element when the test current flows through the conductive pattern; and
an output element for outputting a test result based on the electric signal detected by the detection element.
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Abstract
A semiconductor integrated circuit for detecting a magnetic field includes: a magneto-electric conversion element for detecting the magnetic field and converting a detected magnetic field to an electric signal, a conductive pattern for flowing a test current therethrough, the conductive pattern disposed around the magneto-electric conversion element; a detection element for detecting the electric signal of the magneto-electric conversion element when the test current flows through the conductive pattern; and an output element for outputting a test result based on the electric signal detected by the detection element
37 Citations
19 Claims
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1. A semiconductor integrated circuit for detecting a magnetic field comprising:
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a magneto-electric conversion element for detecting the magnetic field and converting a detected magnetic field to an electric signal; a conductive pattern for flowing a test current therethrough, the conductive pattern disposed around the magneto-electric conversion element; a detection element for detecting the electric signal of the magneto-electric conversion element when the test current flows through the conductive pattern; and an output element for outputting a test result based on the electric signal detected by the detection element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A semiconductor integrated circuit for detecting a magnetic field comprising:
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a Hall element for detecting the magnetic field and converting a detected magnetic field to an electric signal; a bus bar for flowing a constant test current therethrough, the bus bar surrounding the Hall element; and a circuit having a detection portion, an output portion and a current application circuit, wherein the current application circuit applies the constant test current to the bus bar, the detection portion detects the electric signal of the Hall element when the constant test current flows through the bus bar, the bus bar has one of an angulated C shape, an rounded C shape, or a partially rounded U shape, the detection portion determines that the Hall element is normal when a voltage change of the electric signal before and after application of the test current is equal to or smaller than a predetermined threshold value, the detection portion determines that the Hall element is abnormal when the voltage change is larger than the predetermined threshold value, and the output portion outputs a test result that the Hall element is normal or abnormal.
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Specification