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JPS5510280A - Fail-safe logic circuit - Google Patents

Fail-safe logic circuit

Info

Publication number
JPS5510280A
JPS5510280A JP8341678A JP8341678A JPS5510280A JP S5510280 A JPS5510280 A JP S5510280A JP 8341678 A JP8341678 A JP 8341678A JP 8341678 A JP8341678 A JP 8341678A JP S5510280 A JPS5510280 A JP S5510280A
Authority
JP
Japan
Prior art keywords
input
circuit
output
fail
safe
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
JP8341678A
Other languages
Japanese (ja)
Inventor
Mitsuru Yoda
Koichi Yomogihara
Mitsuo Nishimura
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.)
Nippon Signal Co Ltd
Original Assignee
Nippon Signal 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 Nippon Signal Co Ltd filed Critical Nippon Signal Co Ltd
Priority to JP8341678A priority Critical patent/JPS5510280A/en
Publication of JPS5510280A publication Critical patent/JPS5510280A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/007—Fail-safe circuits

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Logic Circuits (AREA)

Abstract

PURPOSE:To remove operation unstableness at the time of actuation by securing fail and safe completeness by connecting a logic converter circuit, which generates a constant level output by being supplied with a negative polarity voltage or positive polarity voltage excluded from an input, in series to a feedback circuit. CONSTITUTION:NOT circuit T is inserted into the feedback circuit and feeds NOT AS or OS of output AS or CS of basic logic circuits OR back to the input of basic logic circuit A1. Here, inputting a negative-polarity or positive-polarity voltage excluded from an input generates a constant-level output and NOT output -V equivalent to ''0'' is outputted corresponding to the input condition of circuit A1. With an input of direct current voltage -V equivalent to ''0'', oscillations start at a fixed threshold level and NOT output +V is developed. Consequently, the unstableness of starting operation can be removed with assurance of perfect fail and safe.
JP8341678A 1978-07-08 1978-07-08 Fail-safe logic circuit Pending JPS5510280A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8341678A JPS5510280A (en) 1978-07-08 1978-07-08 Fail-safe logic circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8341678A JPS5510280A (en) 1978-07-08 1978-07-08 Fail-safe logic circuit

Publications (1)

Publication Number Publication Date
JPS5510280A true JPS5510280A (en) 1980-01-24

Family

ID=13801824

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8341678A Pending JPS5510280A (en) 1978-07-08 1978-07-08 Fail-safe logic circuit

Country Status (1)

Country Link
JP (1) JPS5510280A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58105792A (en) * 1981-12-18 1983-06-23 プフアフ・インダストリ−マシ−ネン・ゲゼルシヤフト・ミト・ベシユレンクテル・ハフツング Sewing machine having apparatus for forming stitch mesh of corner part
JPS5944295A (en) * 1982-08-02 1984-03-12 クヴイツク−ロ−タン・エレクトロモト−レン・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Apparatus for driving and controlling sewing machine
JPS59197284A (en) * 1983-02-25 1984-11-08 プアフ、インダストリーマシーネン、ゲーエムベーハー Stitching of obliquely spliced corner part and semi- automatic splet needle rod sewing machine
JPS6182783A (en) * 1984-09-28 1986-04-26 ジューキ株式会社 Constant position stop apparatus of sewing machine
JPS625393A (en) * 1985-06-29 1987-01-12 ブラザー工業株式会社 Dimension stitching apparatus in sewing machine
JPS625395A (en) * 1985-06-29 1987-01-12 ブラザー工業株式会社 Constant dimension stitching apparatus in sewing machine
JPS6230781U (en) * 1985-08-06 1987-02-24
JPS63276326A (en) * 1987-05-08 1988-11-14 Hitachi Ltd Logic system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5024575A (en) * 1973-07-05 1975-03-15

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5024575A (en) * 1973-07-05 1975-03-15

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58105792A (en) * 1981-12-18 1983-06-23 プフアフ・インダストリ−マシ−ネン・ゲゼルシヤフト・ミト・ベシユレンクテル・ハフツング Sewing machine having apparatus for forming stitch mesh of corner part
JPH0157596B2 (en) * 1981-12-18 1989-12-06 Pfaff Ind Masch
JPS5944295A (en) * 1982-08-02 1984-03-12 クヴイツク−ロ−タン・エレクトロモト−レン・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Apparatus for driving and controlling sewing machine
JPS59197284A (en) * 1983-02-25 1984-11-08 プアフ、インダストリーマシーネン、ゲーエムベーハー Stitching of obliquely spliced corner part and semi- automatic splet needle rod sewing machine
JPH0239277B2 (en) * 1983-02-25 1990-09-04 Pfaff Ind Masch
JPS6182783A (en) * 1984-09-28 1986-04-26 ジューキ株式会社 Constant position stop apparatus of sewing machine
JPS625393A (en) * 1985-06-29 1987-01-12 ブラザー工業株式会社 Dimension stitching apparatus in sewing machine
JPS625395A (en) * 1985-06-29 1987-01-12 ブラザー工業株式会社 Constant dimension stitching apparatus in sewing machine
JPS6230781U (en) * 1985-08-06 1987-02-24
JPH0314151Y2 (en) * 1985-08-06 1991-03-29
JPS63276326A (en) * 1987-05-08 1988-11-14 Hitachi Ltd Logic system
JPH0656949B2 (en) * 1987-05-08 1994-07-27 株式会社日立製作所 Logical unit

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