JPS5684554A - Detecting circuit for index - Google Patents

Detecting circuit for index

Info

Publication number
JPS5684554A
JPS5684554A JP16106079A JP16106079A JPS5684554A JP S5684554 A JPS5684554 A JP S5684554A JP 16106079 A JP16106079 A JP 16106079A JP 16106079 A JP16106079 A JP 16106079A JP S5684554 A JPS5684554 A JP S5684554A
Authority
JP
Japan
Prior art keywords
pulse
index
notch
rotation
monostable multivibrator
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
JP16106079A
Other languages
Japanese (ja)
Inventor
Shunji Nakamura
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP16106079A priority Critical patent/JPS5684554A/en
Publication of JPS5684554A publication Critical patent/JPS5684554A/en
Pending legal-status Critical Current

Links

Landscapes

  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)

Abstract

PURPOSE: To obtain a stable index pulse for the change of rotation in a wide range by counting periodically the pulse obtained by the rotation of a notched disc.
CONSTITUTION: The notch pulse (a) obtained from the notched disc 1 is counted 6 through AND 5 with a count gate signal (d). The content of a counter 6 is stored in a register 7 by a register set signal (e), subjected to D/A conversion 8, and led to the time-constant circuit of a monostable multivibrator 11. The monostable multivibrator 11 is triggered by the fall of the abovementioned notch pulse (a) and the output thereof is inputted, together with the notch pulse (a), to an AND gate 12, whereby the index pulse (c) is obtained.
COPYRIGHT: (C)1981,JPO&Japio
JP16106079A 1979-12-12 1979-12-12 Detecting circuit for index Pending JPS5684554A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16106079A JPS5684554A (en) 1979-12-12 1979-12-12 Detecting circuit for index

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16106079A JPS5684554A (en) 1979-12-12 1979-12-12 Detecting circuit for index

Publications (1)

Publication Number Publication Date
JPS5684554A true JPS5684554A (en) 1981-07-09

Family

ID=15727842

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16106079A Pending JPS5684554A (en) 1979-12-12 1979-12-12 Detecting circuit for index

Country Status (1)

Country Link
JP (1) JPS5684554A (en)

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