JPS5731224A - Magnetic recording and reproducing circuit - Google Patents
Magnetic recording and reproducing circuitInfo
- Publication number
- JPS5731224A JPS5731224A JP10666880A JP10666880A JPS5731224A JP S5731224 A JPS5731224 A JP S5731224A JP 10666880 A JP10666880 A JP 10666880A JP 10666880 A JP10666880 A JP 10666880A JP S5731224 A JPS5731224 A JP S5731224A
- Authority
- JP
- Japan
- Prior art keywords
- output
- circuit
- level
- magnetic recording
- reproducing 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.)
- Pending
Links
Classifications
-
- 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
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Digital Magnetic Recording (AREA)
- Manipulation Of Pulses (AREA)
Abstract
PURPOSE:To detect the defect or the end of lifetime of a magnetic medium, by opening and closing the output of a zero cross detecting circuit with the output of a circuit that detects that an input signal is higher than the reference level. CONSTITUTION:The output (b) of a preamplifying circuit 2 is compared with the reference voltage (a) of a reference voltage generating circuit 10 through a comparator 11. When the output (b) is higher than the voltage (a), a retrigger monostable multivibrator 12 is triggered. Thus the output of an OR circuit 13 is set at a high level, and the output of a zero cross detecting circuit 14 is sent to a data separator 5 through an AND circuit. When the level of the output (b) drops, the output of the vibrator 12 does not exist to eliminate the output of the AND circuit 14. Thus an error is detected after lapse of a certain time.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10666880A JPS5731224A (en) | 1980-08-02 | 1980-08-02 | Magnetic recording and reproducing circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10666880A JPS5731224A (en) | 1980-08-02 | 1980-08-02 | Magnetic recording and reproducing circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5731224A true JPS5731224A (en) | 1982-02-19 |
Family
ID=14439448
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10666880A Pending JPS5731224A (en) | 1980-08-02 | 1980-08-02 | Magnetic recording and reproducing circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5731224A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0203562A2 (en) * | 1985-05-27 | 1986-12-03 | Matsushita Electric Industrial Co., Ltd. | An information recording and reproducing apparatus |
JPS639005A (en) * | 1986-06-30 | 1988-01-14 | Toshiba Corp | Magnetic recording and reproducing device |
-
1980
- 1980-08-02 JP JP10666880A patent/JPS5731224A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0203562A2 (en) * | 1985-05-27 | 1986-12-03 | Matsushita Electric Industrial Co., Ltd. | An information recording and reproducing apparatus |
JPS639005A (en) * | 1986-06-30 | 1988-01-14 | Toshiba Corp | Magnetic recording and reproducing device |
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