JPS5459907A - Rotary type magnetic recording medium tester - Google Patents
Rotary type magnetic recording medium testerInfo
- Publication number
- JPS5459907A JPS5459907A JP12570777A JP12570777A JPS5459907A JP S5459907 A JPS5459907 A JP S5459907A JP 12570777 A JP12570777 A JP 12570777A JP 12570777 A JP12570777 A JP 12570777A JP S5459907 A JPS5459907 A JP S5459907A
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- correction
- circuit
- voltage
- signal
- 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 improve reliability and facilitate automation of measurement by correcting the read voltage of a recording medium with the signal voltage corresponding to the change in the number of revolutions and converting the same to the signal voltage corresponding to the time for one round of the recording medium.
CONSTITUTION: The signal having been magnetic-recorded in a recording medium 1 is read and amplified with a read head 2 and an amplifier 3, and is converted to an absolue value signal E1 in an absolute value circuit 4. This signal is sent from a correction circuit 5 to an integration circuit 6, where it is integrated at the time constants of a resistance R and the capacitor C of the integration circuit, whereby an average value signal voltage E0 is obtained. The correction in this correction circuit is accomplished by multiplying the absolute value signal voltage E1 and correction voltage ER to provide the characteristics of the multiplier of the correction circuit 5. The time constant of the integration circuit is controlled by obtaining the correction voltage ER inversely proportional to the time required for one round of the recording medium, whereby the mean value of the read signal voltage for one round of the recording medium is always obtained. This enables stability to be obtained in terms of reliability
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12570777A JPS5459907A (en) | 1977-10-21 | 1977-10-21 | Rotary type magnetic recording medium tester |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12570777A JPS5459907A (en) | 1977-10-21 | 1977-10-21 | Rotary type magnetic recording medium tester |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5459907A true JPS5459907A (en) | 1979-05-15 |
Family
ID=14916730
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12570777A Pending JPS5459907A (en) | 1977-10-21 | 1977-10-21 | Rotary type magnetic recording medium tester |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5459907A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62150186A (en) * | 1985-12-25 | 1987-07-04 | Sony Tektronix Corp | Magnetic disc evaluator |
-
1977
- 1977-10-21 JP JP12570777A patent/JPS5459907A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62150186A (en) * | 1985-12-25 | 1987-07-04 | Sony Tektronix Corp | Magnetic disc evaluator |
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