JPS54110774A - Logic circuit - Google Patents

Logic circuit

Info

Publication number
JPS54110774A
JPS54110774A JP1781878A JP1781878A JPS54110774A JP S54110774 A JPS54110774 A JP S54110774A JP 1781878 A JP1781878 A JP 1781878A JP 1781878 A JP1781878 A JP 1781878A JP S54110774 A JPS54110774 A JP S54110774A
Authority
JP
Japan
Prior art keywords
vin
circuit
vth
output
input terminal
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
JP1781878A
Other languages
Japanese (ja)
Inventor
Koichi Fujita
Katsufusa Isoda
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP1781878A priority Critical patent/JPS54110774A/en
Publication of JPS54110774A publication Critical patent/JPS54110774A/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
    • H03K19/0002—Multistate logic

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)

Abstract

PURPOSE:To decrease the number of terminals of the package by giving the potential change of more than three points to one unit of the external input terminal to secure the logic and thus to deliver three kinds of the truth value and thus saving one external input terminal. CONSTITUTION:When input voltage Vin's absolute value ¦Vin¦ is more than VSS and at the same time less than threshold voltage (¦VTH¦), enhancement FETQ1 does not conduct. Ant the output of inverter circuit 1 features the L-potential under VO VSS, and both V3 and V4 feature the L-potential since Vin is supplied to the input of NOR circuit 2 and 3. When Vin is under the 2nd state, Q1 conducts. And ¦VO¦<¦VTH¦ is secured owing to the relation of the conductance of Q1 as gm2 of gm1>>Q2, and thus circuit 1 does not conduct yet with the output of L and V3 of H respectively. With Vin under the 3rd state, ¦VO¦>¦VTH¦ is satisfied with the output of L for circuit 1 and V3 of L each. And V4 features H. In such way, the three kinds of the truth value can be delivered through one unit of the external input terminal.
JP1781878A 1978-02-17 1978-02-17 Logic circuit Pending JPS54110774A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1781878A JPS54110774A (en) 1978-02-17 1978-02-17 Logic circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1781878A JPS54110774A (en) 1978-02-17 1978-02-17 Logic circuit

Publications (1)

Publication Number Publication Date
JPS54110774A true JPS54110774A (en) 1979-08-30

Family

ID=11954304

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1781878A Pending JPS54110774A (en) 1978-02-17 1978-02-17 Logic circuit

Country Status (1)

Country Link
JP (1) JPS54110774A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57197927A (en) * 1981-05-30 1982-12-04 Toshiba Corp Semiconductor integrated circuit device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57197927A (en) * 1981-05-30 1982-12-04 Toshiba Corp Semiconductor integrated circuit device

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