JPS5564641A - Magnetic recorder - Google Patents
Magnetic recorderInfo
- Publication number
- JPS5564641A JPS5564641A JP13858178A JP13858178A JPS5564641A JP S5564641 A JPS5564641 A JP S5564641A JP 13858178 A JP13858178 A JP 13858178A JP 13858178 A JP13858178 A JP 13858178A JP S5564641 A JPS5564641 A JP S5564641A
- Authority
- JP
- Japan
- Prior art keywords
- bias
- tape
- signal
- adjustment
- automatic
- 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
Abstract
PURPOSE: To use wastefully a tape for an automatic bias adjustment by generating a rewind control signal from a rewind control circuit corresponding to an automatic bias adjustment end signal.
CONSTITUTION: When a reference frequency signal recorded on tape 7 is regenerated and the regeneration output reaches a fixed level, a coincidence signal from level detector 14 makes an automatic adjustment of a recording bias current to the best value through bias control circuit 20 and variable bias oscillator 18. At the end of the automatic adjustment of this bias, line 61 connected to circuit 20 is inverted from a high level to low level and a low-level signal serves as a bias adjustment end signal to set FF44 by way of switch 62 and differentiating circuit 63. Until it is reset by a detection signal of the tape initial point, the tape is rewound by a reset output from FF44 and the reference frequency signal recorded at the bias adjustment is erased. Therefore, the tape is automatically rewound in response to the tape due to the automatic bias adjustment can be prevented.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53138581A JPS5944703B2 (en) | 1978-11-10 | 1978-11-10 | magnetic recording device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53138581A JPS5944703B2 (en) | 1978-11-10 | 1978-11-10 | magnetic recording device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5564641A true JPS5564641A (en) | 1980-05-15 |
JPS5944703B2 JPS5944703B2 (en) | 1984-10-31 |
Family
ID=15225455
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53138581A Expired JPS5944703B2 (en) | 1978-11-10 | 1978-11-10 | magnetic recording device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5944703B2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5133407U (en) * | 1974-09-02 | 1976-03-11 |
-
1978
- 1978-11-10 JP JP53138581A patent/JPS5944703B2/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5133407U (en) * | 1974-09-02 | 1976-03-11 |
Also Published As
Publication number | Publication date |
---|---|
JPS5944703B2 (en) | 1984-10-31 |
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