JPS55129910A - Magnetic signal reproducing device - Google Patents

Magnetic signal reproducing device

Info

Publication number
JPS55129910A
JPS55129910A JP3794179A JP3794179A JPS55129910A JP S55129910 A JPS55129910 A JP S55129910A JP 3794179 A JP3794179 A JP 3794179A JP 3794179 A JP3794179 A JP 3794179A JP S55129910 A JPS55129910 A JP S55129910A
Authority
JP
Japan
Prior art keywords
signal
elements
magnetic field
output signal
amplifier
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
JP3794179A
Other languages
Japanese (ja)
Inventor
Shuhei Tsuchimoto
Tetsuo Muramatsu
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Priority to JP3794179A priority Critical patent/JPS55129910A/en
Publication of JPS55129910A publication Critical patent/JPS55129910A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To obtain a stable output signal even if a magnetized material is static for a magnetic resistance element, by supplying an AC current to the magnetic resistance element to perform differential amplification.
CONSTITUTION: The part between magnetoresistance effect element 1 arranged in a position where no signal magnetic field is detected and magnetic resistance element 2 arranged in a positin where the signal magnetic field can be detected is grounded, and power is supplied to elements 1 and 2 from AC power source 3. The phase of the signal of element 1 is inverted by operational amplifier 4 so that output signal elements 1 and 2 may have the same phase, and signals at output point 6 of amplifier 4 and output point 7 of element 2 are subjected to AC differential amplification by operational amplifier 5. Here, if the same characteristic is given to elements 1 and 2, Vout=K.Is(w).ΔR(H) is true in respect to output signal Vout at output point 8 of amplifier 5. In this expression, ΔR(H), Is(w) and K are resistance change components, an AC current, and the amplification factor respectivey. That is, even if the signal magnetic field is constant, AC differential amplification can be performed by supplying the AC to elements 1 and 2, so that the output signal dependent upon resistance change components for the signal magnetic field can be obtained.
COPYRIGHT: (C)1980,JPO&Japio
JP3794179A 1979-03-27 1979-03-27 Magnetic signal reproducing device Pending JPS55129910A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3794179A JPS55129910A (en) 1979-03-27 1979-03-27 Magnetic signal reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3794179A JPS55129910A (en) 1979-03-27 1979-03-27 Magnetic signal reproducing device

Publications (1)

Publication Number Publication Date
JPS55129910A true JPS55129910A (en) 1980-10-08

Family

ID=12511572

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3794179A Pending JPS55129910A (en) 1979-03-27 1979-03-27 Magnetic signal reproducing device

Country Status (1)

Country Link
JP (1) JPS55129910A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5774807A (en) * 1980-10-29 1982-05-11 Canon Inc Reproducing method of magnetic recording signal
US4388699A (en) * 1981-01-19 1983-06-14 National Semiconductor Corporation Bubble memory sense amplifier
JPS629503A (en) * 1985-07-08 1987-01-17 Nippon Telegr & Teleph Corp <Ntt> Signal reproducing device for magnetic resistance head
JP2009030344A (en) * 2007-07-27 2009-02-12 Dow Kakoh Kk Composite heat insulator and outside stretching thermal insulation structure

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5365709A (en) * 1976-11-24 1978-06-12 Ibm Conversion circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5365709A (en) * 1976-11-24 1978-06-12 Ibm Conversion circuit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5774807A (en) * 1980-10-29 1982-05-11 Canon Inc Reproducing method of magnetic recording signal
JPH0123844B2 (en) * 1980-10-29 1989-05-09 Kyanon Kk
US4388699A (en) * 1981-01-19 1983-06-14 National Semiconductor Corporation Bubble memory sense amplifier
JPS629503A (en) * 1985-07-08 1987-01-17 Nippon Telegr & Teleph Corp <Ntt> Signal reproducing device for magnetic resistance head
JP2009030344A (en) * 2007-07-27 2009-02-12 Dow Kakoh Kk Composite heat insulator and outside stretching thermal insulation structure

Similar Documents

Publication Publication Date Title
US4283643A (en) Hall sensing apparatus
US3340467A (en) Magnetic metal detector utilizing a magnetic bridge formed with permanent magnets and a hall effect sensor
JPS55129910A (en) Magnetic signal reproducing device
ES8601487A1 (en) Circuit having a magnetic field sensor for measuring a magnetic field.
JPS5765416A (en) Control circuit system for magnetic bearing
GB1533168A (en) Amplification system
JPS54128719A (en) Vertical magnetization recorder
JPS54158960A (en) Position detector
JPS5269673A (en) Magnetic signal detecting circuit
JPS5273794A (en) Magnetic detection circuit for bank notes, etc.
JPS5776451A (en) Measuring circuit for eddy current magnetic field
JPS55152415A (en) Detector for angle of rotation
JPS5333609A (en) Improvement of dynamic range for aural signal
JPH0552872A (en) Effective value level detector
JPS5512401A (en) Eddy current type range finder
JPS5765415A (en) Control circuit system for magnetic bearing
JPS55125404A (en) Distortion gage
JPS55144557A (en) Surface potentiometer
JPS5588181A (en) Counter with read device
JPS5273793A (en) Magnetic detection circuit for bank notes, etc.
ES2103173A1 (en) Self-calibrated digital current sensor.
JPS57120202A (en) Linear tracking arm device
JPS5660369A (en) Magnetic field vector detector having magnetic field erasing winding
JPS5845501A (en) Detector for movement position of moving material to be detected
JPS5560803A (en) Measuring method for long matter