JPH0325792A - Semiconductor memory device - Google Patents

Semiconductor memory device

Info

Publication number
JPH0325792A
JPH0325792A JP1162327A JP16232789A JPH0325792A JP H0325792 A JPH0325792 A JP H0325792A JP 1162327 A JP1162327 A JP 1162327A JP 16232789 A JP16232789 A JP 16232789A JP H0325792 A JPH0325792 A JP H0325792A
Authority
JP
Japan
Prior art keywords
amplifier
output
dummy
preamplifier
signal
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
JP1162327A
Other languages
Japanese (ja)
Inventor
Kenji Togami
健司 冨上
Yasuharu Nagayama
長山 安治
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP1162327A priority Critical patent/JPH0325792A/en
Publication of JPH0325792A publication Critical patent/JPH0325792A/en
Pending legal-status Critical Current

Links

Landscapes

  • Static Random-Access Memory (AREA)
  • Dram (AREA)

Abstract

PURPOSE:To latch the output of a pre-amplifier correctly by providing a dummy pre-amplifier circuit, and delaying a signal to latch following the delay of the output of the pre-amplifier. CONSTITUTION:A dummy B.L 25, the inverse of B.L 26, a dummy column decoder 23, a dummy I/O line 27, the inverse of I/O line 28 are provided in the same array of the pre-amplifier 7. And a dummy bit line, the inverse of DBL is always set at low. Since the dummy decoder 23 and an amplifier 24 are arranged in the same array, the output of the regular pre-amplifier 7 is also delayed when the output of the amplifier 7 is delayed due to process abnormality. Then, input to a generation circuit 6 is performed after the output phi11 of the amplifier 24 goes to high, and signals phi8 and phi9 are generated. The signal phi11 is a signal to latch the amplifier 24, and is delayed following the delay of the output of the amplifier 24, and latches the output of the amplifier 24 correctly.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は半導体記憶装贋ζこ関し、特に,低消費電力
化のために、外部アドレス遷移時に単発(一定期間)動
作するプリアンプ(差動増幅器)回路を有する半導体記
憶装置香ζ関するものである。
[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to semiconductor memory devices, and in particular, to reduce power consumption, a preamplifier (differential The present invention relates to a semiconductor memory device having an amplifier (amplifier) circuit.

〔従来の技#〕[Traditional technique #]

第3図は従来の卒導体記憶装置におけるコラムアドレス
からプリアンプまでの構或を示す回路図である。図中、
(1)はアドレスパツ′7ア、(2)はコラムアドレス
遷移発生回路%(3)はアドレス遷移検知回路、(4)
はコラムデコーダ、(5)はプリアンプ(差動増幅器)
制御信号発生回路,(6)はプリアンプ出カラッチ信号
発生回路、(7)はプリアンプ(差動増幅器) . +
81はインバータ、(9)〜a5lはn型トランジスタ
、fle 1?)はP型トランジスタをそれぞれ表わす
FIG. 3 is a circuit diagram showing the structure from a column address to a preamplifier in a conventional secondary conductor memory device. In the figure,
(1) is the address patch '7a, (2) is the column address transition generation circuit, (3) is the address transition detection circuit, (4)
is a column decoder, (5) is a preamplifier (differential amplifier)
Control signal generation circuit, (6) is preamplifier output caratch signal generation circuit, (7) is preamplifier (differential amplifier). +
81 is an inverter, (9) to a5l are n-type transistors, fle1? ) respectively represent P-type transistors.

第4図は第3図の構成の回路動作を示すタイミングチャ
ートである。
FIG. 4 is a timing chart showing the circuit operation of the configuration shown in FIG.

次に動作について説明する。Next, the operation will be explained.

まず、外部のコラムアドレスが切り換わると−アドレス
切り換わりを示すワンショットパルスl2が発生する。
First, when the external column address is switched, a one-shot pulse l2 indicating a -address switch is generated.

このl2を受け,(3)のアドレス遷移を検知する回路
が動作し、コラムデコーダ(4)およびプリアンプ(差
動増幅器)(7)を制御する信号Os,l5を発生する
。yf8はコラムデコーダ(4)を選択可能にする信号
で−アドレスY2に対応するコラムデコーダ(4)が,
〆4の■{の期間選択される。このとき,Vcc −V
th  ニフ!J チ’r − シサhティタI /O
.I/O線がn,W}ランジスタ(9)叫がONするこ
とによッテ、BitLine− BitLine ( 
C (Dとき、すでにセンスされているので、Bit 
Lineはここでは“H’ Bit Lineは゜ビに
なっているものとする)とそれぞれ短絡され、l70線
がBit Lineに引かれ@Low”6こ下がろうと
し、I/O ,I/O線の間に曙位差が生じる。次に、
アドレス遷移を示す信号hにより、ブリアンプ(7》を
制御する{i号メ5を発生させる。この信号Isを受け
、ある遅延をもってプリアンプ(7}を活性化する信号
lII6を%生させる。この信号メ。が゛H”の期間プ
リアンプすなわち差動増14器(7)が動作する。この
差動増幅器には通常カレントミラー型を用いる場合が多
く、動作中は貫通電流が流れるため、低消費化のために
、信号l6をある期間のみ”H”とし、プリアンプを単
発動作させる。ところで、信号l6はI/’0 ,I/
O線にある電位差が伺いてから発生し、ブリアンプを活
性化させて、プリアンプの出力として信@S.を発生さ
せる。ここでは、I/Oが゜H” I/Oが“L′のと
き、l,は゜H になるとする(1/0がL   I/
OがHの場合はIアは”L”のまま)。
In response to this l2, the address transition detection circuit (3) operates and generates signals Os and l5 that control the column decoder (4) and preamplifier (differential amplifier) (7). yf8 is a signal that enables column decoder (4) to be selected. - Column decoder (4) corresponding to address Y2 is
↑ 4 ■ { period is selected. At this time, Vcc −V
th niff! J Chi'r-Sisahtita I/O
.. By turning on the I/O line n, W} transistor (9), BitLine-BitLine (
C (At D, since it is already sensed, Bit
Lines are short-circuited with "H' Bit Line is assumed to be ゜B here), and the l70 line is drawn to Bit Line, and @Low" tries to go down by 6, and the I/O and I/O lines There is a difference in the dawn position between the two. next,
A signal h indicating an address transition generates a signal I5 that controls a preamplifier (7).Receiving this signal Is, a signal lII6 that activates a preamplifier (7) is generated with a certain delay.This signal The preamplifier, that is, the differential amplifier 14 (7), operates while the main signal is "H".This differential amplifier is usually of the current mirror type, and a through current flows during operation, reducing power consumption. Therefore, the signal l6 is set to "H" only for a certain period of time, and the preamplifier is operated singly.By the way, the signal l6 is I/'0, I/
A potential difference is generated on the O line, activates the preamplifier, and generates a signal as the output of the preamplifier. to occur. Here, it is assumed that when I/O is ゜H'' and I/O is ``L'', l becomes ゜H (1/0 is L I/O).
If O is H, Ia remains "L").

プリアンプ(7》が非活性の場合は、イδ号fIiyは
Lowになっている。次に、プリアンプ(7》の出力デ
ータメ,をブリアンプ制御信号l,を受け、差動増幅器
ブ〆 リアンプ)出力ラッチ信号発生回路(6)から発生する
信号Is , Inにより“H″出力l,をラツテし、
゛H”のData Outを出力する。
When the preamplifier (7》) is inactive, the δ signal fIiy is Low.Next, the output data of the preamplifier (7》) receives the preamplifier control signal l, and outputs the differential amplifier preamplifier. The signal Is, In generated from the latch signal generation circuit (6) latches the "H" output l,
Outputs Data Out of “H”.

〔発明が解決しようこする課題〕[Problems to be solved by the invention]

従来の半導体記憶装置は以上のように構成されていたの
で、プロセス製造上、最も厳しいデコーダ、メモリセル
アレイ内の(4)あるいはトランスファーゲート(9)
,四にプロ匁ス異常( vthが高い、B低下等)があ
る例えば04の連延,,.(9) ,αQのvthが異
常に高いなどと、第4図のタイミングチャート中の破線
で示すように,I/O ,I/O線の開きが遅れ、十分
な電位差がつぐまでに時間がかかる。
Conventional semiconductor memory devices are configured as described above, and therefore, the most demanding decoder, (4) in the memory cell array, or transfer gate (9) in terms of process manufacturing.
, For example, if there is a pro-momme abnormality (high VTH, low B, etc.) in 04, . (9) If the vth of αQ is abnormally high, as shown by the broken line in the timing chart in Figure 4, the opening of the I/O and I/O lines will be delayed, and it will take time to close the sufficient potential difference. It takes.

この已き、プリアンプを活性化させる馬および出力をラ
ッチするM号〆8,s,は信号〆,によって発生するの
で、I/O ,!/0の電位差が十分でない間に発生1
7てしまう。乙ころで、I/O , I/Oの電位差が
十分でない状態でブリアンプ(カレントミラー型)7i
?動作させ,ると、ブリアンプの出力l,が第4図中の
破線で示すように遅れが生じる。
At this time, since the signal 〆8,s, which activates the preamplifier and latches the output, is generated by the signal 〆,, I/O,! Occurs while the potential difference of /0 is not sufficient 1
7. At around 2, when the potential difference between I/O and I/O is insufficient, the briamp (current mirror type) 7i
? When operated, the output l of the pre-amplifier is delayed as shown by the broken line in FIG.

すなわち、期間Tの間の馬とIs , l*との重なり
がずれ、ブリアンプの出力を正しくラッチできず誤動作
するという問題点があった。
That is, there is a problem in that the overlap between the horse and Is, l* during the period T is deviated, and the output of the pre-amplifier cannot be latched correctly, resulting in malfunction.

この発明は上記のような問題点を解消するためになされ
たもので、何らかなプロセス異常によりブリアンプ出力
に遅延が生じても、正しくブリアンプの出力をラッチす
ることを可能とした半導体記憶装置を得ることを・目的
とする。
This invention was made to solve the above-mentioned problems, and provides a semiconductor memory device that can correctly latch the output of the pre-amplifier even if the output of the pre-amplifier is delayed due to some process abnormality. To aim at something.

〔課題を解決するための手段〕[Means to solve the problem]

この発明に係る半導体記憶装置はダミーのB,L ,B
,L , I/O , I/O  ブリアンプ回路を備
え、ダミーブリアンプの出力fこより正規のブリアンプ
出力をラッチするようにしたものである。
The semiconductor memory device according to the present invention has dummy B, L, B
, L, I/O, I/O pre-amplifier circuits, and the normal pre-amplifier output is latched from the output f of the dummy pre-amplifier.

〔作用〕[Effect]

この発明における半導体記憶装置はブリアンプ出力をダ
ミープリアンプの出力によりラッチするようにしたので
、プロ々ス異常によるブリアンプ出力の遅延によるラッ
チ誤動作を防ぐことができ以下、この発明の一実施例を
図についで説明す゛る。なお、この実施例の説明におい
て、従来の技術こ重複する部分fこついては適宜その説
明を省略する。
Since the semiconductor memory device according to the present invention latches the pre-amplifier output with the output of the dummy preamplifier, it is possible to prevent latch malfunctions due to delays in the pre-amplifier output due to process abnormalities. I will explain it here. In the description of this embodiment, the description of parts that overlap with the conventional technology will be omitted as appropriate.

第1図はこの発明の一実施例による半導体記憶装置の回
路構成を示す図である。本発明では、ダミーB,L(2
5)および珂L (26)とダミーのコラムデコーダ(
23)とダミーのI/OC27)i、1 / 0 (2
8)とダミーのブリアンプ04)を設け、ダミーピット
ラインDBLは常にLowになるようにしてお《。これ
ら、ダZ−B,L,X/0,ブリアンプ等は、正規のブ
リアンプと同じアレイ内に配置する。
FIG. 1 is a diagram showing a circuit configuration of a semiconductor memory device according to an embodiment of the present invention. In the present invention, dummies B, L (2
5) and a dummy column decoder (26) and a dummy column decoder (
23) and dummy I/OC27) i, 1/0 (2
8) and a dummy pre-amplifier 04) are installed so that the dummy pit line DBL is always Low. These da Z-B, L, X/0, preamplifiers, etc. are placed in the same array as the regular preamplifier.

前記従来の問題点でも説明したが、プロセス異常がある
乏例えばLSiが長めに仕上がりvthが上がるとする
と、通常設計基準の厳しいデコーダI/Oゲート(9)
 , do), 1B), 119痔(7) Vthは
異常6ζ高くなる場合がある。
As explained in the conventional problems above, if there is a process abnormality, for example, if the LSi is finished with a longer length and the vth increases, the decoder I/O gate (9), which usually has strict design standards.
, do), 1B), 119 Hemorrhoids (7) Vth may be abnormally high.

このとき、ダミーのデコーダ、プリアンプ等を同じアレ
イ内{こ配置しているので、プロセス異常によるブリア
ンプ出力の遅延も正規のブリアンプとダミーのプリアン
プ両方の出力も同様に遅延する。第1図の各信号を示す
タイミングテヤート第2図における破線で示す信号が、
ブリアンプ出力の遅延がある場合である。第2図に示す
ように、ブリアンプ出力メ,をラツチするための信号y
js , d,を発生するための発生回路(6)にダミ
ーのブリアンプ出力SOを入力し、l1,がH1ζなっ
てから、I,を発生するようにしている。従来の方式で
はブリアンプの出力とは別系統にプリアンプ出力をラッ
チする信号を発生させていたのに対して、本実施例では
ブリアンプの出力をラッチする信号の発生回路1こ入力
している;なおコラムアドレスが切})換わってからの
回路動作および従来の回路第3図と同一の番号を示す部
分の名称等は従来の技術で示したものと同様である。
At this time, since the dummy decoder, preamplifier, etc. are arranged in the same array, the delay in the preamplifier output due to a process abnormality is similarly delayed in the outputs of both the regular preamplifier and the dummy preamplifier. The timing chart showing each signal in FIG. 1. The signals shown by broken lines in FIG. 2 are as follows.
This is the case when there is a delay in the pre-amplifier output. As shown in Figure 2, the signal y for latching the pre-amplifier output
The dummy preamplifier output SO is input to the generating circuit (6) for generating js, d, and I is generated after l1 becomes H1ζ. In the conventional system, a signal for latching the preamplifier output is generated in a separate system from the output of the preamplifier, whereas in this embodiment, one signal generation circuit for latching the output of the preamplifier is input; The circuit operation after the column address is changed and the names of the parts having the same numbers as in the conventional circuit in FIG. 3 are the same as those shown in the conventional technique.

〔発明の効果』 以上のようにこの発明によれば、ダミーのデコーダ、プ
リアンプ等を設け、ダミープリアンプの出力を正規のブ
リアンプ出力ラッチ信号発生回路に入力したので、プロ
セス異常によりブリアンプの出力が遅れても、その遅延
に追従してブリアンプの出力をラッチする信号も遅れる
のでラッチの誤動作を防ぐことができる。
[Effects of the Invention] As described above, according to the present invention, a dummy decoder, preamplifier, etc. are provided, and the output of the dummy preamplifier is inputted to the regular preamplifier output latch signal generation circuit, so that the output of the preamplifier is delayed due to process abnormality. However, the signal for latching the output of the pre-amplifier is also delayed to follow the delay, so malfunction of the latch can be prevented.

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

第1図はこの発明の一実施例による半導体記憶装置の回
路図、第2図は第1図の各信号のタイミングチャート図
、第3図は従来の半導体記憶装置の回路図、第4図は第
3図の各信号のタイミングチャート図をそれぞれ示す。 図において、(1)はアドレスバツファ、(2)はコラ
ムアドレス遷移発生回路、(3)はアドレス遷移検知回
路、(4)はコラムデコーダ、(5)はプリアンプ(差
動増幅器)制御信号発生回路、(6)はブリアンプ出力
ラッチ信号発生回路、(7)はブリアンプ、(8)はイ
ンバータ、(9)〜α5),α8}’− 9 2)はn
型MOS }ランジスタ、(10,(17)(.tPW
MOS ト−yンジスタ、(23)はダミーコラムデコ
ーダ、a4)はダミーブリアンプ、(2のはダミービッ
トライン,e26)はダ藍一ビットライン、Q7)はダ
ミーI/O線、C28)はダミーI/O線である。 なお、図中、同一符号は同一、又は相当部分を示す。
FIG. 1 is a circuit diagram of a semiconductor memory device according to an embodiment of the present invention, FIG. 2 is a timing chart of each signal in FIG. 1, FIG. 3 is a circuit diagram of a conventional semiconductor memory device, and FIG. 4 is a circuit diagram of a conventional semiconductor memory device. 3 shows timing charts of each signal in FIG. 3, respectively. In the figure, (1) is an address buffer, (2) is a column address transition generation circuit, (3) is an address transition detection circuit, (4) is a column decoder, and (5) is a preamplifier (differential amplifier) control signal generator. circuit, (6) is a preamplifier output latch signal generation circuit, (7) is a preamplifier, (8) is an inverter, (9) ~ α5), α8}'-9 2) is n
type MOS } transistor, (10, (17) (.tPW
MOS transistor, (23) is dummy column decoder, a4) is dummy reamplifier, (2 is dummy bit line, e26) is blue bit line, Q7) is dummy I/O line, C28) is This is a dummy I/O line. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

【特許請求の範囲】[Claims]  ATD回路および一定期間のみ動作するプリアンプ回
路を有する半導体記憶装置において、ダミーのプリアン
プ回路を備えることにより、プリアンプ出力の遅延に伴
いプリアンプ出力をラッチする信号も追従して遅延させ
ることを特徴とする半導体記憶装置。
A semiconductor memory device having an ATD circuit and a preamplifier circuit that operates only for a certain period of time, characterized in that by providing a dummy preamplifier circuit, a signal for latching the preamplifier output follows and is delayed as the preamplifier output is delayed. Storage device.
JP1162327A 1989-06-22 1989-06-22 Semiconductor memory device Pending JPH0325792A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1162327A JPH0325792A (en) 1989-06-22 1989-06-22 Semiconductor memory device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1162327A JPH0325792A (en) 1989-06-22 1989-06-22 Semiconductor memory device

Publications (1)

Publication Number Publication Date
JPH0325792A true JPH0325792A (en) 1991-02-04

Family

ID=15752432

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1162327A Pending JPH0325792A (en) 1989-06-22 1989-06-22 Semiconductor memory device

Country Status (1)

Country Link
JP (1) JPH0325792A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009134840A (en) * 2007-11-01 2009-06-18 Panasonic Corp Semiconductor storage device
USRE44589E1 (en) 1994-06-02 2013-11-12 Mosaid Technologies Incorporated Single chip frame buffer and graphics accelerator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE44589E1 (en) 1994-06-02 2013-11-12 Mosaid Technologies Incorporated Single chip frame buffer and graphics accelerator
JP2009134840A (en) * 2007-11-01 2009-06-18 Panasonic Corp Semiconductor storage device

Similar Documents

Publication Publication Date Title
JP3945793B2 (en) Data input circuit for synchronous semiconductor memory device
US6260128B1 (en) Semiconductor memory device which operates in synchronism with a clock signal
KR0165159B1 (en) Semiconductor memory device
JPH08279282A (en) Integrated circuit memory
JPH07254278A (en) Synchronous memory device with automatic precharging function
JPH04319600A (en) Combined circuit of sense amplifier and latching circuit
JPH01205788A (en) Semiconductor integrated circuit
JP2001084776A (en) Semiconductor memory
JPH1166851A (en) Clock shift circuit device, clock shift circuit and synchronous type semiconductor storage device using it
JP2001052498A (en) Semiconductor memory
US9183949B2 (en) Semiconductor device
JPH07201179A (en) Semiconductor memory system
US7885133B2 (en) Memory control device
US8050135B2 (en) Semiconductor memory device
JPH0325792A (en) Semiconductor memory device
US6597201B1 (en) Dynamic predecoder circuitry for memory circuits
US5940330A (en) Synchronous memory device having a plurality of clock input buffers
US6292402B1 (en) Prefetch write driver for a random access memory
JP2908776B2 (en) Write recovery guarantee circuit for memory device and operation signal control method
JP3109986B2 (en) Signal transition detection circuit
KR100304749B1 (en) Semiconductor storage device
JPH11297072A (en) Semiconductor memory system and its control method
JP3082229B2 (en) Memory device
JPH1186547A (en) Semiconductor integrated circuit device
JP4494613B2 (en) Semiconductor memory device