JPS55133130A - Malfunction prevention circuit at power supply application and disconnection - Google Patents

Malfunction prevention circuit at power supply application and disconnection

Info

Publication number
JPS55133130A
JPS55133130A JP3984879A JP3984879A JPS55133130A JP S55133130 A JPS55133130 A JP S55133130A JP 3984879 A JP3984879 A JP 3984879A JP 3984879 A JP3984879 A JP 3984879A JP S55133130 A JPS55133130 A JP S55133130A
Authority
JP
Japan
Prior art keywords
disconnection
power supply
gate element
logic circuit
internal logic
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
JP3984879A
Other languages
Japanese (ja)
Inventor
Yuji Miura
Yoshiharu Taki
Michio Kagawa
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 JP3984879A priority Critical patent/JPS55133130A/en
Publication of JPS55133130A publication Critical patent/JPS55133130A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/125—Discriminating pulses
    • H03K5/1252—Suppression or limitation of noise or interference

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Safety Devices In Control Systems (AREA)
  • Logic Circuits (AREA)
  • Electronic Switches (AREA)

Abstract

PURPOSE:To prevent the malfunction at power supply application and disconnection, by constituting the gate element at the control signal output stage of the internal logic circuit of the digital control unit with the gate element possible for grounding the output terminal. CONSTITUTION:The output terminal of the open collector gate element 8 being the output stage of the internal logic circuit 2 is connected to one of the input terminals of the output stage gate element 3 with one terminal of the switch 4. The switch 4 is OFF at normal operation and the control signal from the internal logic circuit 2 is delivered from the gate element 3 to the controlled unit 7. At the application or disconnection of the power supply, the switch 4 is ON, one output of the gate element 3 is grounded and this is made OFF. Thus, at the application and disconnection of the power supply, the noise due to abnormal operation of the internal logic circuit 2 is blocked to be delivered to the controlled unit 7, enabling to prevent the malfunction of the internal logic circuit 6 of the controlled unit 7.
JP3984879A 1979-04-04 1979-04-04 Malfunction prevention circuit at power supply application and disconnection Pending JPS55133130A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3984879A JPS55133130A (en) 1979-04-04 1979-04-04 Malfunction prevention circuit at power supply application and disconnection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3984879A JPS55133130A (en) 1979-04-04 1979-04-04 Malfunction prevention circuit at power supply application and disconnection

Publications (1)

Publication Number Publication Date
JPS55133130A true JPS55133130A (en) 1980-10-16

Family

ID=12564373

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3984879A Pending JPS55133130A (en) 1979-04-04 1979-04-04 Malfunction prevention circuit at power supply application and disconnection

Country Status (1)

Country Link
JP (1) JPS55133130A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS588239U (en) * 1981-07-07 1983-01-19 三洋電機株式会社 output device
JPS58147338U (en) * 1982-03-26 1983-10-04 株式会社日立製作所 Power failure detection circuit
JPS60112017A (en) * 1983-11-22 1985-06-18 Olympus Optical Co Ltd Camera for endoscope
JPS63703A (en) * 1986-06-20 1988-01-05 Matsushita Electric Ind Co Ltd Controller for clothing dryer or the like

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS517813U (en) * 1974-07-05 1976-01-21

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS517813U (en) * 1974-07-05 1976-01-21

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS588239U (en) * 1981-07-07 1983-01-19 三洋電機株式会社 output device
JPS58147338U (en) * 1982-03-26 1983-10-04 株式会社日立製作所 Power failure detection circuit
JPS60112017A (en) * 1983-11-22 1985-06-18 Olympus Optical Co Ltd Camera for endoscope
JPS63703A (en) * 1986-06-20 1988-01-05 Matsushita Electric Ind Co Ltd Controller for clothing dryer or the like

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