Title:
CURRENT DETECTOR
Document Type and Number:
Japanese Patent JP3916225
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To measure a direct current component of a measured current to allow highly precise measurement, by a current detector provided with two Hall elements.
SOLUTION: This current detector 11 has a current/magnetic field conversion means 19 for converting the detected current into a magnetic field, the first Hall element 17A and the second Hall element 17B for outputting voltages proportional to a product of a control current and the magnetic field applied from the current/magnetic field conversion means 19, an adder 25 for summing up outputs from the first Hall element 17A and the second Hall element 17B, the first variable resistance element 27A connected to the first Hall element 17A, of which the resistance value is varied by a voltage of the adder 25, and the second variable resistance element 27B connected to the second Hall element 17B, of which the resistance value is varied by the voltage of the adder 25.
Inventors:
Fuyuki Kurokawa
Application Number:
JP2002177937A
Publication Date:
May 16, 2007
Filing Date:
June 19, 2002
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
G01R15/20; G01R19/00; (IPC1-7): G01R15/20; G01R19/00
Domestic Patent References:
| JP7225247A | ||||
| JP8335730A | ||||
| JP653061A | ||||
| JP2001153895A |
Attorney, Agent or Firm:
Hiroshi Horiguchi
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