JPS57152230A - Logical gate circuit - Google Patents

Logical gate circuit

Info

Publication number
JPS57152230A
JPS57152230A JP3697581A JP3697581A JPS57152230A JP S57152230 A JPS57152230 A JP S57152230A JP 3697581 A JP3697581 A JP 3697581A JP 3697581 A JP3697581 A JP 3697581A JP S57152230 A JPS57152230 A JP S57152230A
Authority
JP
Japan
Prior art keywords
diode
inverter
circuit
trq1
emitter
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
JP3697581A
Other languages
Japanese (ja)
Other versions
JPH0249574B2 (en
Inventor
Susumu Mori
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 JP3697581A priority Critical patent/JPH0249574B2/en
Publication of JPS57152230A publication Critical patent/JPS57152230A/en
Publication of JPH0249574B2 publication Critical patent/JPH0249574B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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

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

Abstract

PURPOSE:To prevent malfunction and to reduce power consumption by providing a diode whose anode and cathode are connected to the emitter of the 1st PNP transistor (TR) of an inverter circuit and to that of the 2nd PNPTR of an NAND circuit. CONSTITUTION:An inverter TRQ1 receives the 1st input signal, and an inverter TRQ4 receives the 2nd input signal. An output signal from the TRQ1 is sent to an emitter follower TRQ2, and while a diode D8 is connected between the output of the TRQ1 and that of the TRQ4, the emitter output terminal of the TRQ2 is grounded through a diode D7. This diode D7 shifts the threshold level of an inverter circuit 10, and the diode D8 inhibits a current flowing through the resistance R1 of the circuit 10 from flowing to a terminal 2 through the diode D5 of an NAND circuit 20 when the input terminals 1 and 2 are at a high and a low potential respectively.
JP3697581A 1981-03-13 1981-03-13 RONRIGEETOKAIRO Expired - Lifetime JPH0249574B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3697581A JPH0249574B2 (en) 1981-03-13 1981-03-13 RONRIGEETOKAIRO

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3697581A JPH0249574B2 (en) 1981-03-13 1981-03-13 RONRIGEETOKAIRO

Publications (2)

Publication Number Publication Date
JPS57152230A true JPS57152230A (en) 1982-09-20
JPH0249574B2 JPH0249574B2 (en) 1990-10-30

Family

ID=12484749

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3697581A Expired - Lifetime JPH0249574B2 (en) 1981-03-13 1981-03-13 RONRIGEETOKAIRO

Country Status (1)

Country Link
JP (1) JPH0249574B2 (en)

Also Published As

Publication number Publication date
JPH0249574B2 (en) 1990-10-30

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