JPS5885994A - Memory circuit - Google Patents

Memory circuit

Info

Publication number
JPS5885994A
JPS5885994A JP56184774A JP18477481A JPS5885994A JP S5885994 A JPS5885994 A JP S5885994A JP 56184774 A JP56184774 A JP 56184774A JP 18477481 A JP18477481 A JP 18477481A JP S5885994 A JPS5885994 A JP S5885994A
Authority
JP
Japan
Prior art keywords
transistor
ram element
type
data
mostr
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
JP56184774A
Other languages
Japanese (ja)
Inventor
Sadahiro Yasuda
安田 貞宏
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP56184774A priority Critical patent/JPS5885994A/en
Publication of JPS5885994A publication Critical patent/JPS5885994A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11CSTATIC STORES
    • G11C14/00Digital stores characterised by arrangements of cells having volatile and non-volatile storage properties for back-up when the power is down

Abstract

PURPOSE:To hold and reset the storage data even after a power supply is cut off, by constituting an MOSTR like an FAMOS type transistor having a floating gate at the load MOS part of a 6-transistor static RAM element. CONSTITUTION:A static RAM element containing an N type MOSTR is constituted with FAMOS type TRs QF1, QF2 as an MOSTR having a floating gate, N type enhancement MOSTRs QB, QC as a TR connected to the source, and N type enhancement MOSTRs QA, QB as an RAM element selecting TR. The selection signal S is set at 0 in order to turn the data written into the static RAM element into a nonvolatile state. Then the supplied voltage is increased up to a level higher than the pinch-off voltage of the TRs QF1 and QF2 respectively. Thus the storage data is never lost even when a power supply is cut off, and a nonvolatile RAM element is obtained.

Description

【発明の詳細な説明】 本発明は牛導体メモリ回路に係〕、特に不揮発性のラン
ダム・アクセス・メモリ(以下RAMと称す)回路に関
する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to conductive memory circuits, and more particularly to non-volatile random access memory (RAM) circuits.

従来、スタティックR,AMは第1図に示されるような
6コのMOSトランジスタで構成され、このRAMは電
源が供給されている間は書込まれ次データを記憶してい
るが一旦電源が切断されるとその記憶データは失なわれ
てしまう。
Conventionally, static RAM is composed of six MOS transistors as shown in Figure 1, and this RAM is written and stores the next data while power is supplied, but once the power is turned off, If this happens, the stored data will be lost.

本発明はスタティックRλMに記憶され次データが電源
が切断されても喪失せずに再度電源を投入することによ
り書込まれた記憶データが復帰する様にすることを目的
としている。
An object of the present invention is to enable the next data stored in the static RλM to be restored even when the power is turned off without being lost when the power is turned on again.

本発明によるスタティックRAMは例えば7a−ティン
グゲートヲもつMO&)ランジスタを負荷MO8とした
2つのインバータ回路を備え、それぞれの入出力を互い
に交叉接続させた構造上もち、通常はスタティックRA
Mとして動作するが、一旦供給電源電圧金70−ティン
グゲートヲもつMO8)ランジスタのピンチ・オフ電圧
よシ高くすると、゛導通側の70−ティングゲー)f有
するMO8)う/ジスタのツーフーティングゲートに電
子が注入され、そのMO8)ラノジスタの閾値が変動す
る。この閾値の変動は供給電源電圧が切断されても変化
せず、このスタティックBλMの′うローティングゲー
トt−有する負荷MO8)ランジスタの閾値に差ができ
る。これはスタティックBAMに記憶されてbるデータ
をその供給電圧の上昇により、フローティングゲートを
育する負荷MO8の閾値に差を与えることで記憶し、こ
の記憶は供給電源電圧の有無にかかわらず保持できる。
The static RAM according to the present invention includes two inverter circuits with MO&) transistors as loads MO8 having a 7a-ting gate, and has a structure in which the inputs and outputs of each are cross-connected to each other, and is usually a static RA.
However, once the supply voltage is made higher than the pinch-off voltage of the transistor, the MO8) with the 70-ting gate on the conducting side becomes Electrons are injected into the gate, and the threshold value of the MO8) transistor changes. This threshold variation does not change even when the supply voltage is cut off, and a difference is created in the threshold values of the static BλM transistor with the loading gate t. This allows the data stored in the static BAM to be stored by increasing the supply voltage to give a difference to the threshold of the load MO8 that grows the floating gate, and this memory can be maintained regardless of the presence or absence of the supply voltage. .

またこの記憶を消去する九めには電子が注入され九フロ
ーティングゲートから電子を放出させれば良く、その後
再度上記手段で新しくデータ金記憶させることができる
Further, in order to erase this memory, electrons are injected and electrons are released from the floating gate, and then new data can be stored again by the above-mentioned means.

本発明によるスタティックRAMによれば通常はRAM
とし−て働き記憶データを不揮発性にしtい場合も電源
it圧會高くするだけで容易にできる。
According to the static RAM according to the invention, normally the RAM
If you want to make the stored data non-volatile, you can easily do so by simply increasing the pressure of the power supply.

次に具体的な実71例を便用しさらに説明する。Next, 71 concrete examples will be used for further explanation.

42図に本発明実施例によシ構成されたN型MOSトラ
ンジスタによるスタティックRAM素子金示す。第2図
はフローティングゲートをもつMOSトランジスタにF
AMOa  型トランジスタQFI。
FIG. 42 shows a static RAM element using an N-type MOS transistor constructed according to an embodiment of the present invention. Figure 2 shows a MOS transistor with a floating gate.
AMOa type transistor QFI.

Qr! そのソースに接続されるMOS)ランジスタに
Nfiエンハンスメン)MOS )ランジスタQmQc
、RAN素子選択トランスファトラ/ジスタとL−C”
NI!エンハンスメントMOSトランジスタQA  Q
D  で構成された不揮発性RAM素子を示す。その動
作として通常はこのRAMiJRAM素子選択信号S素
子選択信号待にデータの書込み、ま九は読出しが行なわ
れ、一般のスタティックBAMIC子と同様な動作を実
行する。今ここで不発明によるRAM素子に1のデータ
金書込んだ場合(D1閣1.Di−Q)  このデータ
を不揮発性にするためにはまずRAM素子選択信号St
Oにし1次に供給電源電圧を上昇させてQyt、Qrx
)ランジスタのピ/テ・オフ電圧以上にする。この時本
発明によるR、AMセルには“11のデータが書込まれ
ており、Qm )ランジスタはOFF、Qc)ランジス
タがONの状態にあシ従ってQFI  )ランジスタに
とりで電源電圧の高さは無関係で電流は流れない、ま九
QF!)う/ジスタには電流が流れその電源電圧がビ/
テ・オフ電圧を越えるとQys  )う/ジスタのフロ
ーティングゲートにアバランシェ電子注入が行なわれ、
QFI)ランジスタの閾値が上がる。このと1Qrt)
?ンジスタには電流が流れない几め閾値の変動はない。
Qr! MOS) transistor connected to its source Nfi enhancer) MOS) transistor QmQc
, RAN element selection transfer register/register and L-C”
NI! Enhancement MOS transistor QA Q
A non-volatile RAM element configured with D is shown. Normally, data is written and read while waiting for this RAMiJRAM element selection signal S element selection signal, and the same operation as a general static BAMIC element is performed. Now, when data 1 is written to the RAM element according to the invention (D1K1.Di-Q), in order to make this data non-volatile, first the RAM element selection signal St
0 and then increase the supply voltage to Qyt, Qrx
) Make it higher than the pin/te off voltage of the transistor. At this time, the data "11" is written in the R and AM cells according to the present invention, and the Qm) transistor is OFF and the Qc) transistor is ON. (Unrelated, no current flows!) U/A current flows through the resistor, and its power supply voltage becomes V/
When the T-off voltage is exceeded, avalanche electron injection occurs into the floating gate of the transistor (Qys),
QFI) The transistor threshold increases. Konoto 1Qrt)
? There is no fluctuation in the threshold at which current does not flow through the transistor.

このような機構により本発明によるRAM素子に不揮発
データ″IIが書込まれる。このデータは電源が一旦切
断されても、その後電源が投入されt時点で本発明によ
るRAM素子のQF s、 Qy s )う/ジスタの
閾値の違いにより記憶データが復帰する。
With such a mechanism, non-volatile data "II" is written in the RAM element according to the present invention.Even if the power is once turned off, this data is stored as QF s, Qy s of the RAM element according to the present invention at time t when the power is turned on. ) The stored data is restored due to the difference in the threshold values of the registers.

この場合QF1 の閾値がQFI  の閾値よシ大きく
なっている九め電源投入侵、A点の電位は0点の電位よ
シ先に高くなる従ってQc )ランジスタはONし、Q
m )ランジスタは011’FL、先に書込まれ迄不揮
発書込みデータ111が復帰することが確認される。ま
九本発明によるRAMセルの不揮発性記憶データを消去
することはこの場合負荷MO8にFAMOa 型トラン
ジスタを使用しているtめ紫外線の照射によp可能で、
その後再び任意のデータ金上記手段で書込むことができ
る。
In this case, when the QF1 threshold is larger than the QFI threshold, the potential at point A becomes higher than the potential at point 0 before turning on the power.
m) The transistor is 011'FL, and it is confirmed that the non-volatile write data 111 that was previously written is restored. In this case, the non-volatile memory data of the RAM cell according to the present invention can be erased by irradiation with ultraviolet rays using a FAMOa type transistor as the load MO8.
Then you can write any data again by any of the above means.

以上のように従来の6トランジスタスタテイツクRAM
素子の負荷MO8部分にFAMOa 屋トランジスタの
ようなフローティノグゲートf:vするMOS)ラノジ
スタを構成させることにより従来の6トランジスタスタ
テイツクRAM素子のその記憶データが電源が切れると
喪失されるという欠点をなくシ、電源切断後も保持した
いデータを書込め、消去するまで記憶できる不揮発性R
AM素子會提供できる。
As mentioned above, the conventional 6-transistor static RAM
By configuring a floating gate (f:v MOS) transistor such as a FAMO transistor in the load MO8 portion of the element, the drawback that the stored data of the conventional 6-transistor static RAM element is lost when the power is turned off can be overcome. Non-volatile R allows you to write the data you want to keep even after the power is turned off, and it can be stored until erased.
AM device can be provided.

【図面の簡単な説明】[Brief explanation of drawings]

第1図はE/D型MO8)う/ジスタによる従来のスタ
ティック凡AM回路、第2図は木兄明実yssによるス
タティックRAM回路、である。 なお図において、QDI、Qpm・・・・・・デエプv
’)ゾw yMo 8 )ランジスタ、Qt、Qg、Q
s、Q4・・・・・・エノハンスメン)MOS)う/ジ
スタ、QFI、QFI・・・・・・FAMOa  )う
/ジスタ、Qム、 QB、 QC。 QD・・・・侭・工/ハ/スメン)MOS)う/シスタ
、である。
FIG. 1 shows a conventional static general AM circuit using an E/D type MO8) register, and FIG. 2 shows a static RAM circuit using Kinoe Akimi YSS. In the figure, QDI, Qpm...Deepv
') Zow yMo 8) Ransistor, Qt, Qg, Q
s, Q4...Enohancemen) MOS) U/Jista, QFI, QFI...FAMOa) U/JISTA, QMU, QB, QC. QD... 侭・工/Ha/SUMEN)MOS)U/Sista.

Claims (1)

【特許請求の範囲】[Claims] 不挿発性電界効果トランジスタのドレイ/とゲートとを
電源に接続し、ソース側にエンハンスメントaの絶縁ゲ
ート屋電界効果トラ/ジスタのドレインを接続し、咳エ
ンハンスメント型絶縁ゲート型電界効果トツノジスタの
ソースt−基準電位にし九インバータ構造のトランジス
タ回wrt″2個備え、それぞれの人出力を互いに交叉
接続させた構造を有することt−特徴とするメモリ回路
Connect the drain/gate of the non-interruptive field effect transistor to the power supply, connect the drain of the enhancement type insulated gate field effect transistor/transistor to the source side, and connect the source of the enhancement type insulated gate field effect transistor to the source side. A memory circuit characterized in that it has a structure in which two transistor circuits wrt'' each having a nine-inverter structure are set at a reference potential and their outputs are cross-connected to each other.
JP56184774A 1981-11-18 1981-11-18 Memory circuit Pending JPS5885994A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56184774A JPS5885994A (en) 1981-11-18 1981-11-18 Memory circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56184774A JPS5885994A (en) 1981-11-18 1981-11-18 Memory circuit

Publications (1)

Publication Number Publication Date
JPS5885994A true JPS5885994A (en) 1983-05-23

Family

ID=16159072

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56184774A Pending JPS5885994A (en) 1981-11-18 1981-11-18 Memory circuit

Country Status (1)

Country Link
JP (1) JPS5885994A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5051951A (en) * 1989-11-06 1991-09-24 Carnegie Mellon University Static RAM memory cell using N-channel MOS transistors
JPH0896122A (en) * 1994-09-29 1996-04-12 Nec Corp Data converting device
US5646885A (en) * 1994-04-01 1997-07-08 Mitsubishi Denki Kabushiki Kaisha Fast accessible non-volatile semiconductor memory device
JP2015149108A (en) * 2014-02-06 2015-08-20 株式会社半導体理工学研究センター Semiconductor device and storage device, and control method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5051951A (en) * 1989-11-06 1991-09-24 Carnegie Mellon University Static RAM memory cell using N-channel MOS transistors
US5646885A (en) * 1994-04-01 1997-07-08 Mitsubishi Denki Kabushiki Kaisha Fast accessible non-volatile semiconductor memory device
US5757696A (en) * 1994-04-01 1998-05-26 Mitsubishi Denki Kabushiki Kaisha Fast accessible non-volatile semiconductor memory device
JPH0896122A (en) * 1994-09-29 1996-04-12 Nec Corp Data converting device
JP2015149108A (en) * 2014-02-06 2015-08-20 株式会社半導体理工学研究センター Semiconductor device and storage device, and control method thereof

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