JPS5517859A - Magnetic recording device - Google Patents
Magnetic recording deviceInfo
- Publication number
- JPS5517859A JPS5517859A JP9024778A JP9024778A JPS5517859A JP S5517859 A JPS5517859 A JP S5517859A JP 9024778 A JP9024778 A JP 9024778A JP 9024778 A JP9024778 A JP 9024778A JP S5517859 A JPS5517859 A JP S5517859A
- Authority
- JP
- Japan
- Prior art keywords
- recording
- detection points
- data
- bridge
- head
- 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 prevent an erroneous erase of necessary recorded data by detecting whether data has been already recorded on a tape used for recording or not through a balanced bridge circuit where a recording and reproducing head is one side.
CONSTITUTION: When a balanced bridge is formed by resistance RC, capacitor CP, variable resistance VR, etc., according to the impedance of recording and reproducing head RPH, signal G1 which passed through a recording amplifier is not generated at bridge detection points P1 and P2. Meanwhile, in case that data has been already reacorded on a part of the magnetic tape, the bridge becomes unbalanced due to the reproducing output of head RPH, and signals are generated at detection points P1 and P2. Consequently, if recording is performed after the erasing head is driven while monitoring the output of detection points P1 and P2, necessary recorded data is not erased erroneously to perform a good recording.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9024778A JPS5517859A (en) | 1978-07-24 | 1978-07-24 | Magnetic recording device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9024778A JPS5517859A (en) | 1978-07-24 | 1978-07-24 | Magnetic recording device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5517859A true JPS5517859A (en) | 1980-02-07 |
Family
ID=13993163
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9024778A Pending JPS5517859A (en) | 1978-07-24 | 1978-07-24 | Magnetic recording device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5517859A (en) |
-
1978
- 1978-07-24 JP JP9024778A patent/JPS5517859A/en active Pending
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