JPS5532267A - Writing unit with countermeasure to power break - Google Patents

Writing unit with countermeasure to power break

Info

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
Application number
JP10466578A
Other languages
Japanese (ja)
Inventor
Koichi Fukui
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP10466578A priority Critical patent/JPS5532267A/en
Publication of JPS5532267A publication Critical patent/JPS5532267A/en
Pending legal-status Critical Current

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.
JP10466578A 1978-08-28 1978-08-28 Writing unit with countermeasure to power break Pending JPS5532267A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
GB903177A (en) Free running pulse oscillator circuits
GB851344A (en) System and apparatus for magnetically recording binary digits
JPS5532267A (en) Writing unit with countermeasure to power break
GB757161A (en) Improvements in information handling apparatus
EP0049462A3 (en) Memory device
GB862632A (en) Improvements in or relating to magnetic recording apparatus
JPS5744207A (en) Floppy disk device
ATE29634T1 (en) CIRCUIT ARRANGEMENT FOR POTENTIAL-FREE DETECTION OF BINARY ELECTRICAL SIGNALS.
JPS5658122A (en) Reverse current preventing circuit for magnetic head current
JPS56143591A (en) Semiconductor memory device
JPH04586Y2 (en)
JPS5545195A (en) Magnetic reproducing device
JPS56123111A (en) Muting circuit
JPS56163510A (en) Magnetic disk device
SU139480A1 (en) Ferrite transistor cell
JPS56124187A (en) Display method in information retrieving device
JPS57196623A (en) Output controlling circuit
GB892057A (en) Improvements in or relating to the magnetic storage of information
GB913230A (en) Magnetic recording system
JPS57160391A (en) Rotation reversing circuit of motor under overload
KR900002284A (en) Mode conversion circuit at power off of digital audio tape recorder
JPS5755549A (en) Recording system of magnetic tape device
GB1008714A (en) Improvements in or relating to the short period control of transistors employed in switching circuits
JPS5529861A (en) Electrostatic recorder
GB836027A (en) Improvements in gating circuits using transformers