JPS57196623A - Output controlling circuit - Google Patents

Output controlling circuit

Info

Publication number
JPS57196623A
JPS57196623A JP8173181A JP8173181A JPS57196623A JP S57196623 A JPS57196623 A JP S57196623A JP 8173181 A JP8173181 A JP 8173181A JP 8173181 A JP8173181 A JP 8173181A JP S57196623 A JPS57196623 A JP S57196623A
Authority
JP
Japan
Prior art keywords
output
comparator
voltage
power supply
supply voltage
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
JP8173181A
Other languages
Japanese (ja)
Inventor
Yoshihisa Hasegawa
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP8173181A priority Critical patent/JPS57196623A/en
Publication of JPS57196623A publication Critical patent/JPS57196623A/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

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Electronic Switches (AREA)

Abstract

PURPOSE:To prevent malfunction when an output of a comparator is unstable, by outputting an output when a power supply voltage is lowered than the minimum operating voltage of the comparator, in a circuit controlling the output through the detection of the power supply voltage drop with the comparator. CONSTITUTION:A power supply voltage Vcc is applied to a comparator 12, and a voltage dividing the voltage Vcc to a noninverting input terminal with resistors r1 and r2 and a constant voltage is applied to an inverting input terminal. If the power supply voltage is lowered than a constant voltage, an output of the comparator 12 goes to L, an output circuit of an NAND circuit 21 goes to H, a transistor (TR)22 turns on and an output TR15 is cut off. If the power supply voltage Vcc is lowered than the minimum operating voltage of the comparator 12, although the output is unstable, the TR15 cannot be turned on due to the voltage drop of diodes D1-Dn.
JP8173181A 1981-05-28 1981-05-28 Output controlling circuit Pending JPS57196623A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8173181A JPS57196623A (en) 1981-05-28 1981-05-28 Output controlling circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8173181A JPS57196623A (en) 1981-05-28 1981-05-28 Output controlling circuit

Publications (1)

Publication Number Publication Date
JPS57196623A true JPS57196623A (en) 1982-12-02

Family

ID=13754561

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8173181A Pending JPS57196623A (en) 1981-05-28 1981-05-28 Output controlling circuit

Country Status (1)

Country Link
JP (1) JPS57196623A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02161813A (en) * 1988-12-14 1990-06-21 Nec Corp Rs232c line driver ic
CN107820344A (en) * 2017-10-27 2018-03-20 厦门阳光恩耐照明有限公司 Emergent module

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02161813A (en) * 1988-12-14 1990-06-21 Nec Corp Rs232c line driver ic
CN107820344A (en) * 2017-10-27 2018-03-20 厦门阳光恩耐照明有限公司 Emergent module
CN107820344B (en) * 2017-10-27 2024-04-23 厦门阳光恩耐照明有限公司 Emergency module

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