JPS56166633A - Switching circuit - Google Patents

Switching circuit

Info

Publication number
JPS56166633A
JPS56166633A JP7120480A JP7120480A JPS56166633A JP S56166633 A JPS56166633 A JP S56166633A JP 7120480 A JP7120480 A JP 7120480A JP 7120480 A JP7120480 A JP 7120480A JP S56166633 A JPS56166633 A JP S56166633A
Authority
JP
Japan
Prior art keywords
terminal
resistance
base
input
trq2
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
JP7120480A
Other languages
Japanese (ja)
Inventor
Fujio Tanaka
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Priority to JP7120480A priority Critical patent/JPS56166633A/en
Publication of JPS56166633A publication Critical patent/JPS56166633A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
    • H03K3/28—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback
    • H03K3/281—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator
    • H03K3/286—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator bistable
    • H03K3/2893—Bistables with hysteresis, e.g. Schmitt trigger

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electronic Switches (AREA)

Abstract

PURPOSE:To perform switching while giving hysteresis to input and output characteristics by designing a circuit so that the ratio of values of two resistances interposed in series between an input terminal and one transistor (TR) and the base- emitter voltage of the TR have desired values. CONSTITUTION:The emitter terminal of an npn TRQ1 is connected to the cathode of a DC power source 4, and its collector terminal is connected to a resistance R2 and led out as a noninverted output terminal 2. The base terminal of the TRQ1 is led out to the collector terminal of a TRQ2 and a resistance R3. The emitter terminal of a TRQ2 is connected to the cathode of the power sournce 4, and the base terminal to the other terminal of the resistance R2 and a resistance R1. So that the ratio R1/R2 of the resistances R1 and R2 connected between an input terminal 1 and the TRQ1 and a base-emitter voltage VBE2 required for the transition of the TRQ2 to an on-state have desired values, the circuit is designed, thus obtaining the switching circuit of simple constitution having hysteresis as input and output characteristics.
JP7120480A 1980-05-27 1980-05-27 Switching circuit Pending JPS56166633A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7120480A JPS56166633A (en) 1980-05-27 1980-05-27 Switching circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7120480A JPS56166633A (en) 1980-05-27 1980-05-27 Switching circuit

Publications (1)

Publication Number Publication Date
JPS56166633A true JPS56166633A (en) 1981-12-21

Family

ID=13453906

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7120480A Pending JPS56166633A (en) 1980-05-27 1980-05-27 Switching circuit

Country Status (1)

Country Link
JP (1) JPS56166633A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58182922A (en) * 1982-04-21 1983-10-26 Toshiba Corp Input interface circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58182922A (en) * 1982-04-21 1983-10-26 Toshiba Corp Input interface circuit
JPH0368573B2 (en) * 1982-04-21 1991-10-29 Tokyo Shibaura Electric Co

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