JPS63187443U - - Google Patents

Info

Publication number
JPS63187443U
JPS63187443U JP7728787U JP7728787U JPS63187443U JP S63187443 U JPS63187443 U JP S63187443U JP 7728787 U JP7728787 U JP 7728787U JP 7728787 U JP7728787 U JP 7728787U JP S63187443 U JPS63187443 U JP S63187443U
Authority
JP
Japan
Prior art keywords
transistor
power supply
inverting input
input terminal
operational amplifier
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
JP7728787U
Other languages
English (en)
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 filed Critical
Priority to JP7728787U priority Critical patent/JPS63187443U/ja
Publication of JPS63187443U publication Critical patent/JPS63187443U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Dc Digital Transmission (AREA)
  • Small-Scale Networks (AREA)
  • Selective Calling Equipment (AREA)
  • Electronic Switches (AREA)

Description

【図面の簡単な説明】
第1図は本考案の一実施例を示す回路図、第2
図は通信系の構成例を示す図、第3図は従来例を
示す回路図である。 5……2線式通信装置、D1……ダイオード、
Q1……トランジスタ、R1,R2……抵抗、U
1……演算増幅器、+V……正電源。

Claims (1)

    【実用新案登録請求の範囲】
  1. 2線式伝送路に並列に接続されたトランジスタ
    、このトランジスタと接地端子間に挿入された第
    1の抵抗素子とダイオードとの直列回路、この直
    列回路とトランジスタとの接続点に反転入力端子
    を接続し、出力端子を上記トランジスタのベース
    に接続し、正電源より電源電圧の供給を受けて、
    非反転入力端子に入力するデジタル信号に応じて
    トランジスタをオン・オフ制御する演算増幅器お
    よびこの演算増幅器の反転入力端子と正電源間に
    接続した第2の抵抗素子を含む2線式通信装置。
JP7728787U 1987-05-25 1987-05-25 Pending JPS63187443U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7728787U JPS63187443U (ja) 1987-05-25 1987-05-25

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7728787U JPS63187443U (ja) 1987-05-25 1987-05-25

Publications (1)

Publication Number Publication Date
JPS63187443U true JPS63187443U (ja) 1988-11-30

Family

ID=30925150

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7728787U Pending JPS63187443U (ja) 1987-05-25 1987-05-25

Country Status (1)

Country Link
JP (1) JPS63187443U (ja)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5616296A (en) * 1979-07-20 1981-02-17 Ricoh Kk Driver circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5616296A (en) * 1979-07-20 1981-02-17 Ricoh Kk Driver circuit

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