JPS5780831A - Mixed circuit of voltage applied ttl and no voltage applied ttl - Google Patents

Mixed circuit of voltage applied ttl and no voltage applied ttl

Info

Publication number
JPS5780831A
JPS5780831A JP55156460A JP15646080A JPS5780831A JP S5780831 A JPS5780831 A JP S5780831A JP 55156460 A JP55156460 A JP 55156460A JP 15646080 A JP15646080 A JP 15646080A JP S5780831 A JPS5780831 A JP S5780831A
Authority
JP
Japan
Prior art keywords
ttl
voltage applied
mixed circuit
applied ttl
ttl element
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
JP55156460A
Other languages
Japanese (ja)
Inventor
Takamitsu Kono
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP55156460A priority Critical patent/JPS5780831A/en
Publication of JPS5780831A publication Critical patent/JPS5780831A/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
    • H03K19/02—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components
    • H03K19/08—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using semiconductor devices
    • H03K19/082—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using semiconductor devices using bipolar transistors
    • H03K19/088—Transistor-transistor logic

Landscapes

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

Abstract

PURPOSE:To prevent effectively the flow-in phenomenon of a current, by using a normal type TTL element as a voltage unapplied TTL element which exists on the boundary between a voltage applied TTL and a voltage unapplied TTL. CONSTITUTION:For automatization in a facsimile device, power is turned on auto matically at a communication start time. For the purpose of realizing this automatization, a TTL element IC4 operated by a main power source, a TTL element IC5 operated by a stand-by power source, and a mixed circuit are provided. A normal type TTL element is used as an inverter 4 which connects elements IC4 and IC5, thereby preventing the flow-in phenomenon of a current.
JP55156460A 1980-11-08 1980-11-08 Mixed circuit of voltage applied ttl and no voltage applied ttl Pending JPS5780831A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55156460A JPS5780831A (en) 1980-11-08 1980-11-08 Mixed circuit of voltage applied ttl and no voltage applied ttl

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55156460A JPS5780831A (en) 1980-11-08 1980-11-08 Mixed circuit of voltage applied ttl and no voltage applied ttl

Publications (1)

Publication Number Publication Date
JPS5780831A true JPS5780831A (en) 1982-05-20

Family

ID=15628226

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55156460A Pending JPS5780831A (en) 1980-11-08 1980-11-08 Mixed circuit of voltage applied ttl and no voltage applied ttl

Country Status (1)

Country Link
JP (1) JPS5780831A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5599833A (en) * 1979-01-24 1980-07-30 Fairchild Camera Instr Co Transistor logic three state output device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5599833A (en) * 1979-01-24 1980-07-30 Fairchild Camera Instr Co Transistor logic three state output device

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