JPS5672561A - Driving circuit - Google Patents

Driving circuit

Info

Publication number
JPS5672561A
JPS5672561A JP14982779A JP14982779A JPS5672561A JP S5672561 A JPS5672561 A JP S5672561A JP 14982779 A JP14982779 A JP 14982779A JP 14982779 A JP14982779 A JP 14982779A JP S5672561 A JPS5672561 A JP S5672561A
Authority
JP
Japan
Prior art keywords
diode
transistor
level
potential
point
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
JP14982779A
Other languages
Japanese (ja)
Inventor
Noboru Kiyozuka
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP14982779A priority Critical patent/JPS5672561A/en
Publication of JPS5672561A publication Critical patent/JPS5672561A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/003—Modifications for increasing the reliability for protection
    • H03K19/00307—Modifications for increasing the reliability for protection in bipolar transistor circuits

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Logic Circuits (AREA)
  • Dc Digital Transmission (AREA)

Abstract

PURPOSE:To prevent an operation error by connecting in common the respective emitters of two transistors to the constant-current circuit, and connecting a diode between the collector of one transistor and the base terminal of the base input gate circuit connected to the next stage. CONSTITUTION:When the output OUT1 and the output OUT2 are set to an ''L'' level and an ''H'' level, respectively, in case when the ''L'' level of the output OUT1 has become <=''0'' volt due to some cause, the potential of the point B is also lowered. However, the potential of the point D where the cathode terminal of the diode D4 is connected is scarcely varied because the current path from the diode 4 to the transistor Q1 is cut off since the diode D5 has been connected. And, the diode D4 remains turned off, and a drive current of the transistor Q4 is never cut off.
JP14982779A 1979-11-19 1979-11-19 Driving circuit Pending JPS5672561A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14982779A JPS5672561A (en) 1979-11-19 1979-11-19 Driving circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14982779A JPS5672561A (en) 1979-11-19 1979-11-19 Driving circuit

Publications (1)

Publication Number Publication Date
JPS5672561A true JPS5672561A (en) 1981-06-16

Family

ID=15483543

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14982779A Pending JPS5672561A (en) 1979-11-19 1979-11-19 Driving circuit

Country Status (1)

Country Link
JP (1) JPS5672561A (en)

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