JPS5521605A - Constant current switching circuit - Google Patents

Constant current switching circuit

Info

Publication number
JPS5521605A
JPS5521605A JP9359178A JP9359178A JPS5521605A JP S5521605 A JPS5521605 A JP S5521605A JP 9359178 A JP9359178 A JP 9359178A JP 9359178 A JP9359178 A JP 9359178A JP S5521605 A JPS5521605 A JP S5521605A
Authority
JP
Japan
Prior art keywords
constant current
transistor
switching
circuit
turned
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
JP9359178A
Other languages
Japanese (ja)
Inventor
Hitoshi Fujisaki
Mitsunari Sato
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.)
Hitachi Denshi KK
Hitachi Ltd
Original Assignee
Hitachi Denshi KK
Hitachi 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 Hitachi Denshi KK, Hitachi Ltd filed Critical Hitachi Denshi KK
Priority to JP9359178A priority Critical patent/JPS5521605A/en
Publication of JPS5521605A publication Critical patent/JPS5521605A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/16—Modifications for eliminating interference voltages or currents

Landscapes

  • Electronic Switches (AREA)

Abstract

PURPOSE:To reject the adverse effect on the circuit due to the transient characteristics caused by the switching, by providing the constant current circuit to the load of the switching circuit. CONSTITUTION:When a positive pulse is inputted to the switching circuit, the transistor 2 is turned on and the current fed from the constant current source 3 is all fed to the transistor 2. When a negative pulse is inputted, the transistor 2 is turned off, since the collector potential is increased until it is clipped with the Zener diode 5 and the VBE of the transistor 6, the transistor 8 is turned on with the current determined with the Zener voltage and the resistor 7. Further, the supply current at this time is limited with the constant current source 3. Accordingly, since the transient current of switching and the amplitude of the switching pulse are respectively limited with the constant current source 3 and the zener diode 5, the effect to other signal circuit can be removed.
JP9359178A 1978-08-02 1978-08-02 Constant current switching circuit Pending JPS5521605A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9359178A JPS5521605A (en) 1978-08-02 1978-08-02 Constant current switching circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9359178A JPS5521605A (en) 1978-08-02 1978-08-02 Constant current switching circuit

Publications (1)

Publication Number Publication Date
JPS5521605A true JPS5521605A (en) 1980-02-15

Family

ID=14086532

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9359178A Pending JPS5521605A (en) 1978-08-02 1978-08-02 Constant current switching circuit

Country Status (1)

Country Link
JP (1) JPS5521605A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0652496B2 (en) * 1987-03-23 1994-07-06 ユニシス・コーポレーション Low noise transmission line termination circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0652496B2 (en) * 1987-03-23 1994-07-06 ユニシス・コーポレーション Low noise transmission line termination circuit

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