JPS591139U - Sensing marker detection circuit - Google Patents

Sensing marker detection circuit

Info

Publication number
JPS591139U
JPS591139U JP9293082U JP9293082U JPS591139U JP S591139 U JPS591139 U JP S591139U JP 9293082 U JP9293082 U JP 9293082U JP 9293082 U JP9293082 U JP 9293082U JP S591139 U JPS591139 U JP S591139U
Authority
JP
Japan
Prior art keywords
sensing marker
detection circuit
marker detection
light
level
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
JP9293082U
Other languages
Japanese (ja)
Inventor
泰広 志村
Original Assignee
株式会社日立製作所
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 株式会社日立製作所 filed Critical 株式会社日立製作所
Priority to JP9293082U priority Critical patent/JPS591139U/en
Publication of JPS591139U publication Critical patent/JPS591139U/en
Pending legal-status Critical Current

Links

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は磁気テープ装置のセンシングマーカ検出装置の
検出を説明するための図、第２図は従来のセンシングマ
ーカ検出回路を示す図、第３図は本考案の一実施例であ
るセンシングマーカ検出回路を示す図である。 符号の説明、１・・・発光素子、２ａ・・・可変抵抗、
２ｂ乃至２ｅ・・・抵抗、３・・・受光素子、５ａ乃び
５ｂ・・・レベル比較器、６・・・ラッチ回路、７・・
・ゲイン制゛御回路。FIG. 1 is a diagram for explaining detection of a sensing marker detection device of a magnetic tape device, FIG. 2 is a diagram showing a conventional sensing marker detection circuit, and FIG. 3 is a diagram for explaining sensing marker detection according to an embodiment of the present invention. It is a diagram showing a circuit. Explanation of symbols, 1... Light emitting element, 2a... Variable resistor,
2b to 2e...resistor, 3...light receiving element, 5a to 5b...level comparator, 6...latch circuit, 7...
・Gain control circuit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] センシングマーカの反射を検出する第１のレベルとセン
シングマーカが貼られる磁気テープの反射を検出する第
２のレベルの２種の検出レベルをもつ受光器と光量を可
変できる発光器で構成され、磁気テープの反射を第２の
検出レベルで検出することにより自動的に発光器の光量
を設定することを特徴とするセンシングマーカ検出回路
。It consists of a light receiver that has two detection levels: a first level that detects the reflection of the sensing marker and a second level that detects the reflection of the magnetic tape on which the sensing marker is attached, and a light emitter that can vary the amount of light. A sensing marker detection circuit characterized in that the light intensity of a light emitter is automatically set by detecting reflection from a tape at a second detection level.
JP9293082U 1982-06-23 1982-06-23 Sensing marker detection circuit Pending JPS591139U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9293082U JPS591139U (en) 1982-06-23 1982-06-23 Sensing marker detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9293082U JPS591139U (en) 1982-06-23 1982-06-23 Sensing marker detection circuit

Publications (1)

Publication Number Publication Date
JPS591139U true JPS591139U (en) 1984-01-06

Family

ID=30223395

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9293082U Pending JPS591139U (en) 1982-06-23 1982-06-23 Sensing marker detection circuit

Country Status (1)

Country Link
JP (1) JPS591139U (en)

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