JPS56128468A - Demagnetizing circuit - Google Patents

Demagnetizing circuit

Info

Publication number
JPS56128468A
JPS56128468A JP3240880A JP3240880A JPS56128468A JP S56128468 A JPS56128468 A JP S56128468A JP 3240880 A JP3240880 A JP 3240880A JP 3240880 A JP3240880 A JP 3240880A JP S56128468 A JPS56128468 A JP S56128468A
Authority
JP
Japan
Prior art keywords
current
demagnetization
pulse
switch
magnetic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP3240880A
Other languages
Japanese (ja)
Inventor
Takehiko Asano
Masaru Nishimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP3240880A priority Critical patent/JPS56128468A/en
Publication of JPS56128468A publication Critical patent/JPS56128468A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
    • G01R33/09—Magnetoresistive devices

Abstract

PURPOSE:To suppress the heat radiation and ensure a simple control of the demagnetizing current, by using one of a paired electric resistance elements for magnetic detection for a monitor of the magnetic flux density of a magnetic substance and at the same time forming the demagnetizing current to a coil into a form of the pulse train. CONSTITUTION:The A17 of a paired magnetic resistance elements 16 of a magnetic detector 15 is connected to the stabilized DC voltage VC and the input of an amplifier 18. The terminal connected to the amplifier 18 is also connected to the NC terminal 20 of a switch 19. The coil 27 wound round the magnetic substance 26 is connected to the current switch 28, and thus the current flows in the directions of IM and IE during a magnetization and demagnetization respectively. The demagnetization signal control circuit 29 generates both the demagnetization gate signal 30 and the current synchronous pulse 31 by the demagnetization signal. Thus the signal 30 is applied to the current control circuit 32, the switch 28 and the switch 19; while the pulse 31 is applied to the circuit 32 and the voltage comparator 25 respectively. In such way, a demagnetization is ensured by the demagnetizing current pulse 33 that increases gradually with the time synchronous with the pulse 31.
JP3240880A 1980-03-13 1980-03-13 Demagnetizing circuit Pending JPS56128468A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3240880A JPS56128468A (en) 1980-03-13 1980-03-13 Demagnetizing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3240880A JPS56128468A (en) 1980-03-13 1980-03-13 Demagnetizing circuit

Publications (1)

Publication Number Publication Date
JPS56128468A true JPS56128468A (en) 1981-10-07

Family

ID=12358117

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3240880A Pending JPS56128468A (en) 1980-03-13 1980-03-13 Demagnetizing circuit

Country Status (1)

Country Link
JP (1) JPS56128468A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014219827A (en) * 2013-05-08 2014-11-20 日立オムロンターミナルソリューションズ株式会社 Magnetic reading device and bill handling device
WO2015009724A1 (en) * 2013-07-15 2015-01-22 Texas Instruments Incorporated Method and apparatus for demagnetizing transformer cores closed-loop

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014219827A (en) * 2013-05-08 2014-11-20 日立オムロンターミナルソリューションズ株式会社 Magnetic reading device and bill handling device
WO2015009724A1 (en) * 2013-07-15 2015-01-22 Texas Instruments Incorporated Method and apparatus for demagnetizing transformer cores closed-loop
CN105453199A (en) * 2013-07-15 2016-03-30 德克萨斯仪器股份有限公司 Method and apparatus for demagnetizing transformer cores closed-loop
US9704637B2 (en) 2013-07-15 2017-07-11 Texas Instruments Incorporated Method and apparatus for demagnetizing transformer cores in closed loop magnetic current sensors
CN105453199B (en) * 2013-07-15 2018-10-02 德克萨斯仪器股份有限公司 Method and apparatus for demagnetization transformer core closed loop

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