JPS5914426U - input circuit - Google Patents

input circuit

Info

Publication number
JPS5914426U
JPS5914426U JP10911082U JP10911082U JPS5914426U JP S5914426 U JPS5914426 U JP S5914426U JP 10911082 U JP10911082 U JP 10911082U JP 10911082 U JP10911082 U JP 10911082U JP S5914426 U JPS5914426 U JP S5914426U
Authority
JP
Japan
Prior art keywords
power supply
circuit
resistor
terminal
input circuit
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
JP10911082U
Other languages
Japanese (ja)
Inventor
高橋　欣悟
Original Assignee
日本電気株式会社
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 日本電気株式会社 filed Critical 日本電気株式会社
Priority to JP10911082U priority Critical patent/JPS5914426U/en
Publication of JPS5914426U publication Critical patent/JPS5914426U/en
Pending legal-status Critical Current

Links

Landscapes

  • Protection Of Static Devices (AREA)
  • Logic Circuits (AREA)
  • Electronic Switches (AREA)
  • Amplifiers (AREA)

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 the drawing]

第１図は従来の入力回路の一例の回路図、第２図は本考
案の一実施例の回路図である。 １・・・入力回路、２・・・入力保護回路、３・・・ス
イッチ、４・・・プルダウン抵抗、５・・・内部回路初
段、６・・・電源端子、７・・・接地端子、８・・・電
源異常検出回路、９・・・スイッチ制御信号線、１０・
・・信号源、１１・・・信号源から流れる電流。FIG. 1 is a circuit diagram of an example of a conventional input circuit, and FIG. 2 is a circuit diagram of an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Input circuit, 2... Input protection circuit, 3... Switch, 4... Pull-down resistor, 5... Internal circuit first stage, 6... Power supply terminal, 7... Ground terminal, 8...Power supply abnormality detection circuit, 9...Switch control signal line, 10.
... Signal source, 11... Current flowing from the signal source.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 入力端子と内部回路との間に接続されるプルダウン用ま
たはプルアップ用の抵抗と、電源端子に接続し電源に異
常があればこれを検出して信号を出力する電源異常検出
回路と、前記入力端子と前記抵抗との間に接続され、前
記電源異常検出回路からの信号により前記入力端子と前
記抵抗との間を開路にするスイッチとを含むことを特徴
とする入力回路。A pull-down or pull-up resistor connected between the input terminal and the internal circuit, a power supply abnormality detection circuit connected to the power supply terminal to detect an abnormality in the power supply and output a signal, and the input terminal. An input circuit comprising: a switch connected between a terminal and the resistor, the switch opening the circuit between the input terminal and the resistor in response to a signal from the power supply abnormality detection circuit.
JP10911082U 1982-07-19 1982-07-19 input circuit Pending JPS5914426U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10911082U JPS5914426U (en) 1982-07-19 1982-07-19 input circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10911082U JPS5914426U (en) 1982-07-19 1982-07-19 input circuit

Publications (1)

Publication Number Publication Date
JPS5914426U true JPS5914426U (en) 1984-01-28

Family

ID=30254297

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10911082U Pending JPS5914426U (en) 1982-07-19 1982-07-19 input circuit

Country Status (1)

Country Link
JP (1) JPS5914426U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04172823A (en) * 1990-11-07 1992-06-19 Matsushita Electric Ind Co Ltd D/a converter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04172823A (en) * 1990-11-07 1992-06-19 Matsushita Electric Ind Co Ltd D/a converter

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