GB1371686A – Write control circuit
– Google Patents
GB1371686A – Write control circuit
– Google Patents
Write control circuit
Info
Publication number
GB1371686A
GB1371686A
GB2650672A
GB2650672A
GB1371686A
GB 1371686 A
GB1371686 A
GB 1371686A
GB 2650672 A
GB2650672 A
GB 2650672A
GB 2650672 A
GB2650672 A
GB 2650672A
GB 1371686 A
GB1371686 A
GB 1371686A
Authority
GB
United Kingdom
Prior art keywords
conducting
transistors
cell
state
transistor
Prior art date
1971-07-16
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.)
Expired
Application number
GB2650672A
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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.)
1971-07-16
Filing date
1972-06-07
Publication date
1974-10-23
1971-07-16
Priority claimed from DE19712135625
external-priority
patent/DE2135625C/en
1972-06-07
Application filed by International Business Machines Corp
filed
Critical
International Business Machines Corp
1974-10-23
Publication of GB1371686A
publication
Critical
patent/GB1371686A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03K—PULSE TECHNIQUE
H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
H03K3/28—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback
H03K3/281—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator
H03K3/286—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator bistable
G—PHYSICS
G11—INFORMATION STORAGE
G11C—STATIC STORES
G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
G11C11/34—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices
G11C11/40—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors
G11C11/41—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors forming static cells with positive feedback, i.e. cells not needing refreshing or charge regeneration, e.g. bistable multivibrator or Schmitt trigger
G11C11/411—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors forming static cells with positive feedback, i.e. cells not needing refreshing or charge regeneration, e.g. bistable multivibrator or Schmitt trigger using bipolar transistors only
G11C11/4116—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors forming static cells with positive feedback, i.e. cells not needing refreshing or charge regeneration, e.g. bistable multivibrator or Schmitt trigger using bipolar transistors only with at least one cell access via separately connected emittors of said transistors or via multiple emittors, e.g. T2L, ECL
G—PHYSICS
G11—INFORMATION STORAGE
G11C—STATIC STORES
G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
G11C11/34—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices
G11C11/40—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors
G11C11/41—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors forming static cells with positive feedback, i.e. cells not needing refreshing or charge regeneration, e.g. bistable multivibrator or Schmitt trigger
G11C11/413—Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing, timing or power reduction
G11C11/414—Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing, timing or power reduction for memory cells of the bipolar type
G—PHYSICS
G11—INFORMATION STORAGE
G11C—STATIC STORES
G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
G11C11/34—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices
G11C11/40—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors
G11C11/41—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors forming static cells with positive feedback, i.e. cells not needing refreshing or charge regeneration, e.g. bistable multivibrator or Schmitt trigger
G11C11/413—Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing, timing or power reduction
G11C11/414—Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing, timing or power reduction for memory cells of the bipolar type
G11C11/416—Read-write [R-W] circuits
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03K—PULSE TECHNIQUE
H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
H03K3/027—Generators characterised by the type of circuit or by the means used for producing pulses by the use of logic circuits, with internal or external positive feedback
H03K3/037—Bistable circuits
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03K—PULSE TECHNIQUE
H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
H03K3/28—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback
H03K3/281—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator
H03K3/286—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator bistable
H03K3/288—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator bistable using additional transistors in the input circuit
H03K3/2885—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator bistable using additional transistors in the input circuit the input circuit having a differential configuration
Abstract
1371686 Bi-stable transistor circuits INTERNATIONAL BUSINESS MACHINES CORP 7 June 1972 [16 July 1971] 26506/72 Heading H3T [Also in Division G4] An array of cross-coupled transistor storage cells has means (e.g. an exclusive OR gate) to prevent the application of write signals to the cells if the state of the cell corresponds with the data to be written in. In Fig. 2 the cell comprises cross-coupled double emitter transistors Q3, Q4 together with output transistors Q2, Q5, Q6, Q7 and Q8. Current flow to the outer emitters is normally prevented by transistors Q15 and Q16 which are conducting. To change the state of the cell a cell select pulse is applied at 24 to cut off Q15 and Q16 and an «up» or «down» data signal is applied to terminal 13. Accordingly one or other of transistors Q11, Q12 conducts, holding the outer emitter of the conducting one of transistors Q3, Q4 non-conducting and allowing conduction to the outer emitter of the other. The circuit is thus caused to change state. As soon as the change is effected the fall in potential of the collector of the conducting transistor acts via Q5, Q7 and Q18 or Q2, Q6 and Q12 to raise the potential of the conducting outer emitter and thus prevents the remaining part of the write pulse from driving the transistor to saturation. If the state of the cell had corresponded to the new data the write pulse would likewise have been inhibited and the dissipation of power thus reduced.
GB2650672A
1971-07-16
1972-06-07
Write control circuit
Expired
GB1371686A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
DE19712135625
DE2135625C
(en)
1971-07-16
Circuit arrangement for automatic write suppression
Publications (1)
Publication Number
Publication Date
GB1371686A
true
GB1371686A
(en)
1974-10-23
Family
ID=5813914
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB2650672A
Expired
GB1371686A
(en)
1971-07-16
1972-06-07
Write control circuit
Country Status (15)
Country
Link
US
(1)
US3801965A
(en)
JP
(1)
JPS5235499B1
(en)
AR
(1)
AR193884A1
(en)
AT
(1)
AT319637B
(en)
AU
(1)
AU470472B2
(en)
BR
(1)
BR7204708D0
(en)
CA
(1)
CA986231A
(en)
CH
(1)
CH533888A
(en)
DE
(1)
DE2135625B1
(en)
ES
(1)
ES404058A1
(en)
FR
(1)
FR2146241B1
(en)
GB
(1)
GB1371686A
(en)
IT
(1)
IT956633B
(en)
NL
(1)
NL166813C
(en)
SE
(1)
SE384755B
(en)
Families Citing this family (13)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4090258A
(en)
*
1976-12-29
1978-05-16
Westinghouse Electric Corp.
MNOS non-volatile memory with write cycle suppression
DE2707297B1
(en)
*
1977-02-19
1978-05-24
Felten & Guilleaume Carlswerk
Process for the production of an insulating covering made of cross-linked insulating material
US4149270A
(en)
*
1977-09-26
1979-04-10
Westinghouse Electric Corp.
Variable threshold device memory circuit having automatic refresh feature
US4224533A
(en)
*
1978-08-07
1980-09-23
Signetics Corporation
Edge triggered flip flop with multiple clocked functions
FR2443723A1
(en)
*
1978-12-06
1980-07-04
Cii Honeywell Bull
DEVICE FOR REDUCING THE ACCESS TIME TO INFORMATION CONTAINED IN A MEMORY OF AN INFORMATION PROCESSING SYSTEM
DE2926514A1
(en)
*
1979-06-30
1981-01-15
Ibm Deutschland
ELECTRICAL MEMORY ARRANGEMENT AND METHOD FOR THEIR OPERATION
US4535428A
(en)
*
1983-03-10
1985-08-13
International Business Machines Corporation
Multi-port register implementations
US4577292A
(en)
*
1983-05-31
1986-03-18
International Business Machines Corporation
Support circuitry for multi-port systems
US4616347A
(en)
*
1983-05-31
1986-10-07
International Business Machines Corporation
Multi-port system
US4558433A
(en)
*
1983-05-31
1985-12-10
International Business Machines Corporation
Multi-port register implementations
US6002614A
(en)
*
1991-02-08
1999-12-14
Btg International Inc.
Memory apparatus including programmable non-volatile multi-bit memory cell, and apparatus and method for demarcating memory states of the cell
US5218569A
(en)
1991-02-08
1993-06-08
Banks Gerald J
Electrically alterable non-volatile memory with n-bits per memory cell
US6353554B1
(en)
*
1995-02-27
2002-03-05
Btg International Inc.
Memory apparatus including programmable non-volatile multi-bit memory cell, and apparatus and method for demarcating memory states of the cell
Family Cites Families (6)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2876352A
(en)
*
1955-12-27
1959-03-03
Bell Telephone Labor Inc
Self-correcting pulse circuits
US3008129A
(en)
*
1956-07-18
1961-11-07
Rca Corp
Memory systems
US3311893A
(en)
*
1963-08-29
1967-03-28
Sperry Rand Corp
Memory organization wherein only new data bits which are different from the old are recorded
US3413618A
(en)
*
1964-10-19
1968-11-26
Automatic Elect Lab
Memory apparatus employing a plurality of digit registers
US3423737A
(en)
*
1965-06-21
1969-01-21
Ibm
Nondestructive read transistor memory cell
US3504350A
(en)
*
1966-01-11
1970-03-31
Sperry Rand Corp
Flip-flop memory with minimized interconnection wiring
1971
1971-07-16
DE
DE2135625A
patent/DE2135625B1/en
active
Granted
1972
1972-02-09
US
US00224729A
patent/US3801965A/en
not_active
Expired – Lifetime
1972-02-10
AT
AT108872A
patent/AT319637B/en
not_active
IP Right Cessation
1972-06-07
GB
GB2650672A
patent/GB1371686A/en
not_active
Expired
1972-06-08
CH
CH855672A
patent/CH533888A/en
not_active
IP Right Cessation
1972-06-14
AU
AU43415/72A
patent/AU470472B2/en
not_active
Expired
1972-06-16
SE
SE7207945A
patent/SE384755B/en
unknown
1972-06-16
IT
IT25760/72A
patent/IT956633B/en
active
1972-06-20
ES
ES404058A
patent/ES404058A1/en
not_active
Expired
1972-06-28
JP
JP47064145A
patent/JPS5235499B1/ja
active
Pending
1972-06-30
FR
FR7224823*A
patent/FR2146241B1/fr
not_active
Expired
1972-07-06
CA
CA146,449A
patent/CA986231A/en
not_active
Expired
1972-07-11
NL
NL7209577.A
patent/NL166813C/en
not_active
IP Right Cessation
1972-07-14
BR
BR4708/72A
patent/BR7204708D0/en
unknown
1972-07-14
AR
AR243087A
patent/AR193884A1/en
active
Also Published As
Publication number
Publication date
NL166813B
(en)
1981-04-15
ES404058A1
(en)
1975-06-01
NL7209577A
(en)
1973-01-18
BR7204708D0
(en)
1973-07-10
US3801965A
(en)
1974-04-02
FR2146241B1
(en)
1976-10-29
NL166813C
(en)
1981-09-15
CA986231A
(en)
1976-03-23
AU4341572A
(en)
1973-12-20
IT956633B
(en)
1973-10-10
FR2146241A1
(en)
1973-03-02
AT319637B
(en)
1974-12-27
AU470472B2
(en)
1973-12-20
DE2135625B1
(en)
1973-01-04
AR193884A1
(en)
1973-05-31
SE384755B
(en)
1976-05-17
JPS5235499B1
(en)
1977-09-09
CH533888A
(en)
1973-02-15
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Legal Events
Date
Code
Title
Description
1975-03-05
PS
Patent sealed [section 19, patents act 1949]
1987-02-04
PCNP
Patent ceased through non-payment of renewal fee
