JPS55129910A - Magnetic signal reproducing device - Google Patents
Magnetic signal reproducing deviceInfo
- 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
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
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5365709A (en) * | 1976-11-24 | 1978-06-12 | Ibm | Conversion circuit |
-
1979
- 1979-03-27 JP JP3794179A patent/JPS55129910A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5365709A (en) * | 1976-11-24 | 1978-06-12 | Ibm | Conversion circuit |
Cited By (5)
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 |
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