JPS5735421A - Malfunction preventing circuit at power supply application - Google Patents

Malfunction preventing circuit at power supply application

Info

Publication number
JPS5735421A
JPS5735421A JP11075680A JP11075680A JPS5735421A JP S5735421 A JPS5735421 A JP S5735421A JP 11075680 A JP11075680 A JP 11075680A JP 11075680 A JP11075680 A JP 11075680A JP S5735421 A JPS5735421 A JP S5735421A
Authority
JP
Japan
Prior art keywords
power supply
emitter
malfunction
base
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.)
Granted
Application number
JP11075680A
Other languages
Japanese (ja)
Other versions
JPS6046572B2 (en
Inventor
Fumio Kamiya
Takayuki Miyamoto
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.)
Omron Corp
Original Assignee
Omron Tateisi Electronics Co
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 Omron Tateisi Electronics Co filed Critical Omron Tateisi Electronics Co
Priority to JP55110756A priority Critical patent/JPS6046572B2/en
Publication of JPS5735421A publication Critical patent/JPS5735421A/en
Publication of JPS6046572B2 publication Critical patent/JPS6046572B2/en
Expired 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
    • H03K17/22—Modifications for ensuring a predetermined initial state when the supply voltage has been applied
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/22—Modifications for ensuring a predetermined initial state when the supply voltage has been applied
    • H03K2017/226—Modifications for ensuring a predetermined initial state when the supply voltage has been applied in bipolar transistor switches

Landscapes

  • Bipolar Transistors (AREA)
  • Electronic Switches (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE:To suppress the malfunction at the application of power supply with steep rise, by connecting the emitter and the collector of a PNP transistor between the emitter and the base of the PNP transistor objective to the prevention of malfunction. CONSTITUTION:A collector of a malfunction preventing PNP transistor (TR)Q1 is connected to a base of a PNP TRQ2 being the objective of malfunction and the emitter is connected to a power supply VCC. When a power supply voltage steep in rise is applied, a charging current flows to a parasitic capacitor C1 of the TRQ1 through the emitter and the base. Thus, a current hFE times the charging current of the parasitic capacitor C1 flows to the collector of the TRQ1, and this flows in a parasitic capacitor C2 of the TRQ2 as a charging current, and the current flowing to the capacitor C2 via the emitter and the base of the TRQ2 is very less and only small output current I' is caused.
JP55110756A 1980-08-12 1980-08-12 Malfunction prevention circuit at power-on Expired JPS6046572B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55110756A JPS6046572B2 (en) 1980-08-12 1980-08-12 Malfunction prevention circuit at power-on

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55110756A JPS6046572B2 (en) 1980-08-12 1980-08-12 Malfunction prevention circuit at power-on

Publications (2)

Publication Number Publication Date
JPS5735421A true JPS5735421A (en) 1982-02-26
JPS6046572B2 JPS6046572B2 (en) 1985-10-16

Family

ID=14543762

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55110756A Expired JPS6046572B2 (en) 1980-08-12 1980-08-12 Malfunction prevention circuit at power-on

Country Status (1)

Country Link
JP (1) JPS6046572B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59201520A (en) * 1983-04-28 1984-11-15 Omron Tateisi Electronics Co Output circuit
JP2009207015A (en) * 2008-02-28 2009-09-10 Fujitsu Ten Ltd Malfunction preventing apparatus and electronic equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59201520A (en) * 1983-04-28 1984-11-15 Omron Tateisi Electronics Co Output circuit
JP2009207015A (en) * 2008-02-28 2009-09-10 Fujitsu Ten Ltd Malfunction preventing apparatus and electronic equipment

Also Published As

Publication number Publication date
JPS6046572B2 (en) 1985-10-16

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