JPS5532267A - Writing unit with countermeasure to power break - Google Patents
Writing unit with countermeasure to power breakInfo
- Publication number
- JPS5532267A JPS5532267A JP10466578A JP10466578A JPS5532267A JP S5532267 A JPS5532267 A JP S5532267A JP 10466578 A JP10466578 A JP 10466578A JP 10466578 A JP10466578 A JP 10466578A JP S5532267 A JPS5532267 A JP S5532267A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- power voltage
- falls
- write
- transistor
- 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
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/02—Control of operating function, e.g. switching from recording to reproducing
- G11B19/04—Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
Landscapes
- Digital Magnetic Recording (AREA)
Abstract
PURPOSE:To enable a simple constitution to stop the operation of a writing method when a power voltage falls in level, by controlling a transistor via a Zener diode whose across voltage corresponds the fall of the power voltage. CONSTITUTION:Once power voltage +V1 falls, a voltage across Zener diode ZD2 corresponding to voltage +V1 also falls to cut off a current through transistor Q1, and transistor Q2 turns OFF. Therefore, a write output of JK type FF3 corresponding to write data is never applied to magnetic head 2 and regardless of the write enable state by buffer circuit 1, the simple constitution stops the writing operation while the power voltage is low, so that the breakdown of magnetic recording data due to the inflow of an error write current can be prevented.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10466578A JPS5532267A (en) | 1978-08-28 | 1978-08-28 | Writing unit with countermeasure to power break |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10466578A JPS5532267A (en) | 1978-08-28 | 1978-08-28 | Writing unit with countermeasure to power break |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5532267A true JPS5532267A (en) | 1980-03-06 |
Family
ID=14386753
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10466578A Pending JPS5532267A (en) | 1978-08-28 | 1978-08-28 | Writing unit with countermeasure to power break |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5532267A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59135517U (en) * | 1983-02-24 | 1984-09-10 | トキコ株式会社 | writing device |
JPS6329203U (en) * | 1986-08-08 | 1988-02-26 |
-
1978
- 1978-08-28 JP JP10466578A patent/JPS5532267A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59135517U (en) * | 1983-02-24 | 1984-09-10 | トキコ株式会社 | writing device |
JPS6329203U (en) * | 1986-08-08 | 1988-02-26 |
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