JPS56118121A - Overvoltage suppressing circuit - Google Patents

Overvoltage suppressing circuit

Info

Publication number
JPS56118121A
JPS56118121A JP2157380A JP2157380A JPS56118121A JP S56118121 A JPS56118121 A JP S56118121A JP 2157380 A JP2157380 A JP 2157380A JP 2157380 A JP2157380 A JP 2157380A JP S56118121 A JPS56118121 A JP S56118121A
Authority
JP
Japan
Prior art keywords
voltage
fetq1
fets
control terminal
overvoltage
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
JP2157380A
Other languages
Japanese (ja)
Other versions
JPH0227893B2 (en
Inventor
Masato Wada
Masabumi Tanimoto
Nobuaki Ieda
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP2157380A priority Critical patent/JPS56118121A/en
Publication of JPS56118121A publication Critical patent/JPS56118121A/en
Publication of JPH0227893B2 publication Critical patent/JPH0227893B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
    • H02H9/046—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere responsive to excess voltage appearing at terminals of integrated circuits

Abstract

PURPOSE:To suppress the overvoltage of a control terminal, by connecting the control terminal to the constant voltage source through a FET which turns on or off with the amplitude of applied voltage. CONSTITUTION:FETs Q2, Q3 are connected in series, and memory write-in voltage Vp is fed to the drain of FETQ2, and the source of FETQ3 is grounded. By respectively connecting the gate of FETs Q2 and Q3 to the drain, a voltage in response to the gm ratio of FETs Q2, Q3 can be obtained at the node N1. When the voltage at the control terminal T exceeds the threshold voltage VTH of FETQ1 and the voltage of the node N1, FETQ1 is conductive, the voltage at the terminal T is fixed to the voltage conducting FETQ1 and the overvoltage can be suppressed.
JP2157380A 1980-02-25 1980-02-25 Overvoltage suppressing circuit Granted JPS56118121A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2157380A JPS56118121A (en) 1980-02-25 1980-02-25 Overvoltage suppressing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2157380A JPS56118121A (en) 1980-02-25 1980-02-25 Overvoltage suppressing circuit

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP60085843A Division JPS60247895A (en) 1985-04-22 1985-04-22 Overvoltage suppressing circuit for memory

Publications (2)

Publication Number Publication Date
JPS56118121A true JPS56118121A (en) 1981-09-17
JPH0227893B2 JPH0227893B2 (en) 1990-06-20

Family

ID=12058762

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2157380A Granted JPS56118121A (en) 1980-02-25 1980-02-25 Overvoltage suppressing circuit

Country Status (1)

Country Link
JP (1) JPS56118121A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0336926A (en) * 1989-06-08 1991-02-18 Siemens Ag Protector for overvoltage in electronic circuit
US6229740B1 (en) 1999-06-25 2001-05-08 Mitsubishi Denki Kabushiki Kaisha Voltage generation circuit having boost function and capable of preventing output voltage from exceeding prescribed value, and semiconductor memory device provided therewith

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0661495U (en) * 1993-01-29 1994-08-30 南常鉄工株式会社 Horizontal slicer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5045254A (en) * 1973-08-28 1975-04-23
JPS532087A (en) * 1976-06-29 1978-01-10 Toshiba Corp Input protection circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5045254A (en) * 1973-08-28 1975-04-23
JPS532087A (en) * 1976-06-29 1978-01-10 Toshiba Corp Input protection circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0336926A (en) * 1989-06-08 1991-02-18 Siemens Ag Protector for overvoltage in electronic circuit
US6229740B1 (en) 1999-06-25 2001-05-08 Mitsubishi Denki Kabushiki Kaisha Voltage generation circuit having boost function and capable of preventing output voltage from exceeding prescribed value, and semiconductor memory device provided therewith

Also Published As

Publication number Publication date
JPH0227893B2 (en) 1990-06-20

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