JPS56103534A - Pnp current switch circuit - Google Patents

Pnp current switch circuit

Info

Publication number
JPS56103534A
JPS56103534A JP601080A JP601080A JPS56103534A JP S56103534 A JPS56103534 A JP S56103534A JP 601080 A JP601080 A JP 601080A JP 601080 A JP601080 A JP 601080A JP S56103534 A JPS56103534 A JP S56103534A
Authority
JP
Japan
Prior art keywords
transistor
switch circuit
current switch
voltage
pnp current
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
JP601080A
Other languages
Japanese (ja)
Inventor
Hideaki Isogai
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP601080A priority Critical patent/JPS56103534A/en
Publication of JPS56103534A publication Critical patent/JPS56103534A/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
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/603—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors with coupled emitters

Landscapes

  • Logic Circuits (AREA)
  • Electronic Switches (AREA)

Abstract

PURPOSE:To obtain a certain output level, by controlling the reference voltage applied to the reference transistor base after detecting the collector output of the reference transistor. CONSTITUTION:The voltage at the output point A in a PNP current switch circuit is applied to the base of the reference transistor T2 via the detection transistor T4 and feedback transistor T5. Thus a correction is given to the current I which flows to the transistor T2 to keep a certain level of voltage at the point A. Accordingly a certain output level is obtained regardless of a variance of the current amplification factor of the transistor T2.
JP601080A 1980-01-22 1980-01-22 Pnp current switch circuit Pending JPS56103534A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP601080A JPS56103534A (en) 1980-01-22 1980-01-22 Pnp current switch circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP601080A JPS56103534A (en) 1980-01-22 1980-01-22 Pnp current switch circuit

Publications (1)

Publication Number Publication Date
JPS56103534A true JPS56103534A (en) 1981-08-18

Family

ID=11626740

Family Applications (1)

Application Number Title Priority Date Filing Date
JP601080A Pending JPS56103534A (en) 1980-01-22 1980-01-22 Pnp current switch circuit

Country Status (1)

Country Link
JP (1) JPS56103534A (en)

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