JPS5792403A - Regenerative amplifying circuit for mr head - Google Patents
Regenerative amplifying circuit for mr headInfo
- Publication number
- JPS5792403A JPS5792403A JP16655180A JP16655180A JPS5792403A JP S5792403 A JPS5792403 A JP S5792403A JP 16655180 A JP16655180 A JP 16655180A JP 16655180 A JP16655180 A JP 16655180A JP S5792403 A JPS5792403 A JP S5792403A
- Authority
- JP
- Japan
- Prior art keywords
- head
- resistance
- circuit
- constitution
- amplifying circuit
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
- G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
- G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
- G11B5/3906—Details related to the use of magnetic thin film layers or to their effects
- G11B5/3945—Heads comprising more than one sensitive element
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/24—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing noise
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Manufacturing & Machinery (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
- Magnetic Heads (AREA)
Abstract
PURPOSE:To simplify circuit constitution and to reduce noises by using an MR (Magnetoresistive) head as part of the feedback circuit of a regenerative amplifying circuit since the MR head is a resistance. CONSTITUTION:When the gain of the opened loop of a differential amplifying circuit 7 is much greater than that of the closed loop, a current is supplied to an MR head 5 through a resistance so that a voltage at a connection point between the resistance 23 and MR head 5 is equalized to that at a connection point between resistances 21 and 22. If the MR head 5 varies in resistance by an external magnetic field applied to the MR head 5, an output voltage proportional to the resistance variation of the MR head 5 is developed across the resistance 23. Further, only the resistance noise of the MR head 5 and the transistor noise of the circuit 7 are left as noise sources. Therefore, circuit constitution is simplified and noises are reduced with the constitution like this.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16655180A JPS5792403A (en) | 1980-11-28 | 1980-11-28 | Regenerative amplifying circuit for mr head |
EP81109854A EP0053343A1 (en) | 1980-11-28 | 1981-11-24 | Reproducing and amplifying circuit for magnetoresistive head |
US06/324,674 US4492997A (en) | 1980-11-28 | 1981-11-24 | Reproducing and amplifying circuit for magnetoresistive head |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16655180A JPS5792403A (en) | 1980-11-28 | 1980-11-28 | Regenerative amplifying circuit for mr head |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5792403A true JPS5792403A (en) | 1982-06-09 |
JPH0325844B2 JPH0325844B2 (en) | 1991-04-09 |
Family
ID=15833357
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16655180A Granted JPS5792403A (en) | 1980-11-28 | 1980-11-28 | Regenerative amplifying circuit for mr head |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5792403A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5930062A (en) * | 1996-10-03 | 1999-07-27 | Hewlett-Packard Company | Actively stabilized magnetoresistive head |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5153843A (en) * | 1974-11-06 | 1976-05-12 | Nippon Kokan Kk | KYORISOKUTEIHOHO |
JPS551698A (en) * | 1978-06-19 | 1980-01-08 | Philips Nv | Magnetic reading head |
-
1980
- 1980-11-28 JP JP16655180A patent/JPS5792403A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5153843A (en) * | 1974-11-06 | 1976-05-12 | Nippon Kokan Kk | KYORISOKUTEIHOHO |
JPS551698A (en) * | 1978-06-19 | 1980-01-08 | Philips Nv | Magnetic reading head |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5930062A (en) * | 1996-10-03 | 1999-07-27 | Hewlett-Packard Company | Actively stabilized magnetoresistive head |
Also Published As
Publication number | Publication date |
---|---|
JPH0325844B2 (en) | 1991-04-09 |
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