JPS5538677A - Semiconductor memory with function of detecting power failure - Google Patents

Semiconductor memory with function of detecting power failure

Info

Publication number
JPS5538677A
JPS5538677A JP11172378A JP11172378A JPS5538677A JP S5538677 A JPS5538677 A JP S5538677A JP 11172378 A JP11172378 A JP 11172378A JP 11172378 A JP11172378 A JP 11172378A JP S5538677 A JPS5538677 A JP S5538677A
Authority
JP
Japan
Prior art keywords
voltage
power
operational amplifier
write operation
offset voltage
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
JP11172378A
Other languages
Japanese (ja)
Inventor
Kotaro Nishimura
Kanji Yo
Osamu Yamashiro
Harumi Wakimoto
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 JP11172378A priority Critical patent/JPS5538677A/en
Priority to IN118/CAL/79A priority patent/IN151981B/en
Priority to CH1621/79A priority patent/CH657712A5/en
Priority to DE2954543A priority patent/DE2954543C2/de
Priority to DE19792906527 priority patent/DE2906527A1/en
Priority to IT20368/79A priority patent/IT1111987B/en
Priority to FR7904226A priority patent/FR2447036B1/en
Priority to NL7901335A priority patent/NL7901335A/en
Priority to CA000321955A priority patent/CA1149081A/en
Priority to GB8119560A priority patent/GB2081015B/en
Priority to GB8119562A priority patent/GB2081458B/en
Priority to GB8119559A priority patent/GB2081014B/en
Priority to GB8119561A priority patent/GB2100540B/en
Priority to GB7907817A priority patent/GB2016801B/en
Publication of JPS5538677A publication Critical patent/JPS5538677A/en
Priority to CA000395813A priority patent/CA1143010A/en
Priority to CA000395811A priority patent/CA1145063A/en
Priority to CA000395810A priority patent/CA1154880A/en
Priority to CA000395812A priority patent/CA1146223A/en
Priority to HK80/84A priority patent/HK8084A/en
Priority to SG417/84A priority patent/SG41784G/en
Priority to SG41684A priority patent/SG41684G/en
Priority to SG41584A priority patent/SG41584G/en
Priority to MY1984375A priority patent/MY8400375A/en
Priority to CH1928/85A priority patent/CH672391B5/en
Priority to HK364/85A priority patent/HK36485A/en
Priority to HK351/85A priority patent/HK35185A/en
Priority to HK363/85A priority patent/HK36385A/en
Priority to MY658/85A priority patent/MY8500658A/en
Priority to MY671/85A priority patent/MY8500671A/en
Priority to MY672/85A priority patent/MY8500672A/en
Pending legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

Landscapes

  • Static Random-Access Memory (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)

Abstract

PURPOSE: To prevent error write operation in a data retention mode by controlling inhibition of the write operation on detecting a power voltage falling on the basis of an offset voltage of the Fermi energy level of two semiconductors.
CONSTITUTION: To gates of N-type MISFETs Q2 and Q4 differing in threshold level and forming an operational amplifier together with load MISFETs Q1 and Q3 of voltage detection circuit 7, power voltages divided by resistances R1 and R2 are applied and the operational amplifier is applied with the power voltage to develop an offset voltage corresponding to a difference in threshold voltage based upon the Fermi level of FETs Q2 and Q4. When the power voltage falls to decrease a difference between power voltage and the gate potential of FET Q2 down to less than the offset voltage, FETs Q2 and Q4 turn OFF and a data retention mode is detected invert immediately control output (c) of circuit 7 through the operational amplifier under no influence of a temperatre on the basis of not the threshold voltage but the offset voltage. As a result, gate 5 opens to inhibit the chip selection of RAM1, so that error write operation will never be done in a power failure.
COPYRIGHT: (C)1980,JPO&Japio
JP11172378A 1978-03-08 1978-09-13 Semiconductor memory with function of detecting power failure Pending JPS5538677A (en)

Priority Applications (30)

Application Number Priority Date Filing Date Title
JP11172378A JPS5538677A (en) 1978-09-13 1978-09-13 Semiconductor memory with function of detecting power failure
IN118/CAL/79A IN151981B (en) 1978-09-13 1979-02-08
CH1621/79A CH657712A5 (en) 1978-03-08 1979-02-19 REFERENCE VOLTAGE GENERATOR.
DE2954543A DE2954543C2 (en) 1978-03-08 1979-02-20
DE19792906527 DE2906527A1 (en) 1978-03-08 1979-02-20 REFERENCE VOLTAGE GENERATOR
IT20368/79A IT1111987B (en) 1978-03-08 1979-02-20 REFERENCE VOLTAGE GENERATOR DEVICE
FR7904226A FR2447036B1 (en) 1978-03-08 1979-02-20 REFERENCE VOLTAGE GENERATOR
NL7901335A NL7901335A (en) 1978-03-08 1979-02-20 GENERATOR FOR A REFERENCE VOLTAGE.
CA000321955A CA1149081A (en) 1978-03-08 1979-02-20 Reference voltage generator device
GB8119560A GB2081015B (en) 1978-03-08 1979-03-06 Improvements in the manufacture of semiconductor devices
GB8119562A GB2081458B (en) 1978-03-08 1979-03-06 Voltage comparitors
GB8119559A GB2081014B (en) 1978-03-08 1979-03-06 Improvements in the manufacture of semiconductor devices
GB8119561A GB2100540B (en) 1978-03-08 1979-03-06 Reference voltage generators
GB7907817A GB2016801B (en) 1978-03-08 1979-03-06 Referenc voltage generating device
CA000395811A CA1145063A (en) 1978-03-08 1982-02-08 Reference voltage generator device
CA000395813A CA1143010A (en) 1978-03-08 1982-02-08 Reference voltage generator device
CA000395812A CA1146223A (en) 1978-03-08 1982-02-08 Battery checker
CA000395810A CA1154880A (en) 1978-03-08 1982-02-08 Reference voltage generator device
HK80/84A HK8084A (en) 1978-03-08 1984-01-24 A battery checker
SG417/84A SG41784G (en) 1978-03-08 1984-06-04 Reference voltage generating device
SG41684A SG41684G (en) 1978-03-08 1984-06-04 Improvements in the manufacture of a semiconductor device
SG41584A SG41584G (en) 1978-03-08 1984-06-04 Reference voltage generating device
MY1984375A MY8400375A (en) 1978-03-08 1984-12-31 A battery checker
CH1928/85A CH672391B5 (en) 1978-03-08 1985-02-19 REFERENCE VOLTAGE GENERATOR.
HK364/85A HK36485A (en) 1978-03-08 1985-05-09 Reference voltage generating device
HK363/85A HK36385A (en) 1978-03-08 1985-05-09 Improvements in the manufacture of a semiconductor device
HK351/85A HK35185A (en) 1978-03-08 1985-05-09 Reference voltage generating device
MY658/85A MY8500658A (en) 1978-03-08 1985-12-30 Reference voltage generating device
MY671/85A MY8500671A (en) 1978-03-08 1985-12-30 Reference voltage generating device
MY672/85A MY8500672A (en) 1978-03-08 1985-12-30 Reference voltage generating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11172378A JPS5538677A (en) 1978-09-13 1978-09-13 Semiconductor memory with function of detecting power failure

Publications (1)

Publication Number Publication Date
JPS5538677A true JPS5538677A (en) 1980-03-18

Family

ID=14568522

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11172378A Pending JPS5538677A (en) 1978-03-08 1978-09-13 Semiconductor memory with function of detecting power failure

Country Status (1)

Country Link
JP (1) JPS5538677A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63264793A (en) * 1988-02-03 1988-11-01 カシオ計算機株式会社 Overdubbing device for electronic musical instruments
CN108027780A (en) * 2015-12-22 2018-05-11 华为技术有限公司 A memory content protection circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63264793A (en) * 1988-02-03 1988-11-01 カシオ計算機株式会社 Overdubbing device for electronic musical instruments
CN108027780A (en) * 2015-12-22 2018-05-11 华为技术有限公司 A memory content protection circuit
CN108027780B (en) * 2015-12-22 2020-12-08 华为技术有限公司 A memory content protection circuit

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