CN106971753A - The latch structure that a kind of anti-SEU is reinforced - Google Patents

The latch structure that a kind of anti-SEU is reinforced Download PDF

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Publication number
CN106971753A
CN106971753A CN201610878141.2A CN201610878141A CN106971753A CN 106971753 A CN106971753 A CN 106971753A CN 201610878141 A CN201610878141 A CN 201610878141A CN 106971753 A CN106971753 A CN 106971753A
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China
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node
branch road
nmos tube
pmos
logic circuit
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CN201610878141.2A
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CN106971753B (en
Inventor
王海滨
惠志坚
唐鸿辉
葛惟唯
秦涛
戴茜茜
朱筝
陶宇
李书旗
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Changzhou Campus of Hohai University
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Changzhou Campus of Hohai University
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    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11CSTATIC STORES
    • G11C7/00Arrangements for writing information into, or reading information out from, a digital store
    • G11C7/24Memory cell safety or protection circuits, e.g. arrangements for preventing inadvertent reading or writing; Status cells; Test cells

Abstract

The present invention discloses the latch structure that a kind of anti-SEU is reinforced, including memory cell, prefix logic circuit, the memory cell includes tie point, second branch road, 3rd branch road, 4th branch road, 5th branch road, 6th branch road, the memory cell also includes node A, node B1, node B2, node C1, node C2, node D, the node A is arranged in the tie point, the node B1 is arranged on second branch road, the node B2 is arranged on the 3rd branch road, the node C1 is arranged on the 4th branch road, the node C2 is arranged on the 5th branch road, the node D is arranged on the 6th branch road, the output end of the prefix logic circuit respectively with the node B1, the node B2, the node C1, the node C2 is connected.The present invention increases anti-SEU performance by increasing redundant storage node, and when 0 → 1 and 1 → 0 upset occurs for any of which memory node, the present invention has correct logic to export.

Description

The latch structure that a kind of anti-SEU is reinforced
Technical field
The present invention relates to the latch structure that a kind of anti-SEU is reinforced, belong to latch anti-single particle upset (SEU) reinforcing and set Count technical field.
Background technology
The residing outer space of spacecraft operation, has extremely severe radiation environment.Chip in space by radiating ring The influence in border, easily produces single particle effect and causes the data of chip memory (such as latch) to overturn, this mistake It is referred to as single-particle inversion (SEU).With the development continued forward of modern production process, radiation environment for deep-submicron, The influence of the storage unit circuit of nanometer technology size is increasing, causes circuit more and more sensitive to single particle effect.
The basic structure of conventional memory cell is a pair of back-to-back phase inverters, is connected with each other by positive feedback, Fig. 1 is The basic structure principle schematic of conventional memory cell, shown structure has two complementary memory node A and A '.Assuming that node A logic levels are 0, then A ' logic levels are 1.If node A ', which catches a packet, is turned into 0, node A is possible to therefore overturn Into 1, so that the logic level values of two nodes of A and A ' make a mistake.
With the fast development of China's Aero-Space, urgent skill is proposed to high stability, the chip for being capable of Flouride-resistani acid phesphatase Art demand.Moreover, performance of the commercial product to anti-single particle effect in the key application of ground it is also proposed higher finger Mark is required.
The content of the invention
It is an object of the present invention to which the defect for overcoming prior art to exist, makes up the anti-SEU performances of traditional standard storage organization Low technical problem, proposes the latch structure that a kind of anti-SEU is reinforced.
The present invention is adopted the following technical scheme that:The latch structure that a kind of anti-SEU is reinforced, it is characterised in that including storage Unit, the prefix logic circuit write for data, the memory cell include tie point, the second branch road, the 3rd branch road, the Four branch roads, the 5th branch road, the 6th branch road, the memory cell also include node A, node B1, node B2, node C1, node C2, Node D, the node A are arranged in the tie point, and the node B1 is arranged on second branch road, the node B2 It is arranged on the 3rd branch road, the node C1 is arranged on the 4th branch road, the node C2 is arranged at the described 5th On branch road, the node D is arranged on the 6th branch road, the tie point by the node A and second branch road, 3rd branch road, the 6th branch road are connected, second branch road by the node B1 respectively with the tie point, 4th branch road is connected, the 3rd branch road by the node B2 respectively with the tie point, the 5th branch road It is connected, the 4th branch road is connected with second branch road, the 6th branch road respectively by the node C1, described Five branch roads are connected with the 3rd branch road, the 6th branch road respectively by the node C2, and the 6th branch road passes through institute Node D is stated respectively with the 4th branch road, the 5th branch road, the tie point to be connected, the prefix logic circuit Output end is connected with the node B1, the node B2, the node C1, the node C2 respectively.
Preferably, the tie point includes tie point power supply, PMOS P1, NMOS tube N1A, NMOS tube N1B, described Tie point power supply is connected with the source electrode of the PMOS P1, and the drain electrode of the PMOS P1 is sequentially connected the node A, institute NMOS tube N1A drain electrode is stated, the source electrode of the NMOS tube N1A is connected with the drain electrode of the NMOS tube N1B, the NMOS tube N1B source ground, the grid of the PMOS P1 is connected with the node D, the grid of the NMOS tube N1A and the section Point B1 is connected, and the grid of the NMOS tube N1B is connected with the node B2.
Preferably, second branch road includes the second branch road power supply, PMOS P2A, NMOS tube N2A, second branch road Power supply is connected with the source electrode of the PMOS P2A, and the drain electrode of the PMOS P2A is sequentially connected the node B1, described NMOS tube N2A drain electrode, the source ground of the NMOS tube N2A, the grid of the PMOS P2A is connected with the node A, The grid of the NMOS tube N2A is connected with the node C1.
Preferably, the 3rd branch road includes the 3rd branch road power supply, PMOS P2B, NMOS tube N2B, the 3rd branch road Power supply is connected with the source electrode of the PMOS P2B, and the drain electrode of the PMOS P2B is sequentially connected the node B2, described NMOS tube N2B drain electrode, the source ground of the NMOS tube N2B, the grid of the PMOS P2B is connected with the node A, The grid of the NMOS tube N2B is connected with the node C2.
Preferably, the 4th branch road includes the 4th branch road power supply, PMOS P3A, NMOS tube N3A, the 4th branch road Power supply is connected with the source electrode of the PMOS P3A, and the drain electrode of the PMOS P3A is sequentially connected the node C1, described NMOS tube N3A drain electrode, the source ground of the NMOS tube N3A, the grid of the PMOS P3A is connected with the node D, The grid of the NMOS tube N3A is connected with the node B1.
Preferably, the 5th branch road includes the 5th branch road power supply, PMOS P3B, NMOS tube N3B, the 5th branch road Power supply is connected with the source electrode of the PMOS P3B, and the drain electrode of the PMOS P3B is sequentially connected the node C2, described NMOS tube N3B drain electrode, the source ground of the NMOS tube N3B, the grid of the PMOS P3B is connected with the node D, The grid of the NMOS tube N3B is connected with the node B2.
Preferably, the 6th branch road includes the 6th branch road power supply, PMOS P4, NMOS tube N4A, NMOS tube N4B, described 6th branch road power supply is connected with the source electrode of the PMOS P4, and the drain electrode of the PMOS P4 is sequentially connected the node D, institute NMOS tube N4A drain electrode is stated, the source electrode of the NMOS tube N4A is connected with the drain electrode of the NMOS tube N4B, the NMOS tube N4B source ground, the grid of the PMOS pipes P4 is connected with the node A, the grid of the NMOS tube N4A with it is described Node C1 is connected, and the grid of the NMOS tube N4B is connected with the node C2.
Preferably, the prefix logic circuit includes the first logic circuit, the second logic circuit, the 3rd logic circuit, the Four logic circuits, first logic circuit, second logic circuit, the 3rd logic circuit, the 4th logic electricity Road is respectively connected with each other and formed by 2 PMOSs, 2 NMOS tubes, the input termination data input of first logic circuit In, clock input clock and clock, the output termination node B1 of first logic circuit;The second logic electricity Input termination data input in, the clock input clock and clock on road, the output termination section of second logic circuit Point B2;The input termination data input in of 3rd logic circuit, clock input clock and clock, the 3rd logic The output of circuit terminates the node C1;The input termination data input in of 4th logic circuit, clock input clock And clock, the output termination node C2 of the 4th logic circuit.
The beneficial effect that the present invention is reached:The present invention increases anti-SEU performance by increasing redundant storage node, when 0 → 1 and 1 → 0 upset occurs for any of which memory node, and the present invention can have the output of correct logic.
Brief description of the drawings
Fig. 1 is the basic structure schematic diagram of conventional memory cell.
Fig. 2 is a kind of circuit theory schematic diagram of the latch structure of anti-SEU reinforcings of the present invention.
Fig. 3 is the circuit theory schematic diagram of the logic read/write circuit of the present invention.
Fig. 4 is circuit theory schematic diagram when node B1 of the invention is overturn.
Fig. 5 is circuit theory schematic diagram when node B2 of the invention is overturn.
Fig. 6 is circuit theory schematic diagram when node C1 of the invention is overturn.
Fig. 7 is circuit theory schematic diagram when node C2 of the invention is overturn.
Fig. 8 is circuit theory schematic diagram when node A of the invention is overturn.
Fig. 9 is circuit theory schematic diagram when node D of the invention is overturn.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following examples are only used for clearly illustrating the present invention Technical scheme, and can not be limited the scope of the invention with this.
Fig. 2 is a kind of circuit theory schematic diagram of the latch structure of anti-SEU reinforcings of the present invention.The present invention proposes a kind of The latch structure that anti-SEU is reinforced, it is characterised in that including memory cell, prefix logic circuit, the memory cell includes the One branch road, the second branch road, the 3rd branch road, the 4th branch road, the 5th branch road, the 6th branch road, the memory cell also include node A, Node B1, node B2, node C1, node C2, node D totally six redundant storage nodes, the node A are arranged at described first Lu Shang, the node B1 is arranged on second branch road, and the node B2 is arranged on the 3rd branch road, the node C1 It is arranged on the 4th branch road, the node C2 is arranged on the 5th branch road, the node D is arranged at described 6th Lu Shang, the tie point is connected by the node A with second branch road, the 3rd branch road, the 6th branch road, Second branch road is connected with the tie point, the 4th branch road respectively by the node B1, the 3rd branch road It is connected respectively with the tie point, the 5th branch road by the node B2, the 4th branch road passes through the node C1 is connected with second branch road, the 6th branch road respectively, the 5th branch road by the node C2 respectively with it is described 3rd branch road, the 6th branch road are connected, the 6th branch road by the node D respectively with the 4th branch road, described 5th branch road, the tie point are connected, the output end of the prefix logic circuit respectively with the node B1, the node B2, the node C1, the node C2 are connected.
As a kind of preferred embodiment, the tie point include tie point power supply, PMOS P1, NMOS tube N1A, NMOS tube N1B, the tie point power supply is connected with the source electrode of the PMOS P1, and the drain electrode of the PMOS P1 connects successively The node A, the drain electrode of the NMOS tube N1A are connect, the source electrode of the NMOS tube N1A is connected with the drain electrode of the NMOS tube N1B Connect, the source ground of the NMOS tube N1B, the grid of the PMOS P1 is connected with the node D, the NMOS pipes N1A Grid be connected with the node B1, the grid of the NMOS tube N1B is connected with the node B2.
As a kind of preferred embodiment, second branch road includes the second branch road power supply, PMOS P2A, NMOS tube N2A, the second branch road power supply is connected with the source electrode of the PMOS P2A, and the drain electrode of the PMOS P2A is sequentially connected institute State node B1, the drain electrode of the NMOS tube N2A, the source ground of the NMOS tube N2A, the grid of the PMOS P2A and institute State node A to be connected, the grid of the NMOS tube N2A is connected with the node C1.
As a kind of preferred embodiment, the 3rd branch road includes the 3rd branch road power supply, PMOS P2B, NMOS tube N2B, the 3rd branch road power supply is connected with the source electrode of the PMOS P2B, and the drain electrode of the PMOS P2B is sequentially connected institute State node B2, the drain electrode of the NMOS tube N2B, the source ground of the NMOS tube N2B, the grid of the PMOS P2B and institute State node A to be connected, the grid of the NMOS tube N2B is connected with the node C2.
As a kind of preferred embodiment, the 4th branch road includes the 4th branch road power supply, PMOS P3A, NMOS tube N3A, the 4th branch road power supply is connected with the source electrode of the PMOS P3A, and the drain electrode of the PMOS P3A is sequentially connected institute State node C1, the drain electrode of the NMOS tube N3A, the source ground of the NMOS tube N3A, the grid of the PMOS P3A and institute State node D to be connected, the grid of the NMOS tube N3A is connected with the node B1.
As a kind of preferred embodiment, the 5th branch road includes the 5th branch road power supply, PMOS P3B, NMOS tube N3B, the 5th branch road power supply is connected with the source electrode of the PMOS P3B, and the drain electrode of the PMOS P3B is sequentially connected institute State node C2, the drain electrode of the NMOS tube N3B, the source ground of the NMOS tube N3B, the grid of the PMOS P3B and institute State node D to be connected, the grid of the NMOS tube N3B is connected with the node B2.
As a kind of preferred embodiment, the 6th branch road includes the 6th branch road power supply, PMOS P4, NMOS tube N4A, NMOS tube N4B, the 6th branch road power supply are connected with the source electrode of the PMOS P4, the drain electrode of the PMOS P4 according to The secondary connection node D, the drain electrode of the NMOS tube N4A, the drain electrode of the source electrode of the NMOS tube N4A and the NMOS tube N4B It is connected, the source ground of the NMOS tube N4B, the grid of the PMOS P4 is connected with the node A, the NMOS tube N4A grid is connected with the node C1, and the grid of the NMOS tube N4B is connected with the node C2.
Fig. 3 is the circuit theory schematic diagram of the prefix logic circuit of the present invention.The prefix logic circuit is patrolled including first Collect circuit, the second logic circuit, the 3rd logic circuit, the 4th logic circuit, first logic circuit, second logic electricity Road, the 3rd logic circuit, the 4th logic circuit are respectively connected with each other and formed by 2 PMOSs, 2 NMOS tubes, Input termination data input in, the clock input clock and clock of first logic circuit, first logic circuit The output termination node B1;Input termination data input in, the clock input clock and clock of second logic circuit, the output termination node B2 of second logic circuit;The input termination data input in of 3rd logic circuit、 Clock inputs clock and clock, the output termination node C1 of the 3rd logic circuit;4th logic circuit Input termination data input in, clock input clock and clock, the output termination node of the 4th logic circuit C2。
The operation principle of the present invention:The latch structure that a kind of anti-SEU of the present invention is reinforced includes data write operation and guarantor Hold operation.Data write operation is:(1) as clock and clockRespectively high level and during low level, if in is high level, Then inFor low level, B1 and B2 are respectively low level, and C1 and C2 are respectively high level;(2) when clock and clock are respectively When high level and low level, if in is low level, inFor high level, then B1 and B2 is high level, and C1 and C2 is low electricity It is flat.It is the circuit conditions under clock and clock is respectively low level and high level to keep operation.
The present invention has the anti-SEU immunitys of single node, because the present invention has symmetry, and following section is worked as in only analysis Anti- SEU characteristics when point A, B1, B2, C1, C2, D are respectively logic 1,0,0,1,1,0, make a concrete analysis of as follows.
The first situation:Node B1 is hit the transient pulse for occurring 0 → 1 by high energy particle.NMOS tube N1A is become by cut-off To turn on, but because NMOS tube N1B still ends, so node A will not be overturn.On the other hand, even if B1 negative transient state Pulse enables to N3A conductings and therefore pulling down node C1 logic level, but this can only allow NMOS tube N4A cut-offs to change Become node D level, so node D floatings are in high-impedance state, Fig. 4 is circuit theory when node B1 of the invention is overturn Schematic diagram.
Second of situation:Node B2 is hit the transient pulse for occurring 0 → 1 by high energy particle.NMOS tube N1B is become by cut-off To turn on, but it is due to that NMOS tube N1A still ends, so node A will not be overturn.On the other hand, even if B2 negative wink State pulse enables to N3B conductings and therefore pulling down node C2 logic level, but this can only allow NMOS tube N4B cut-offs can't Concept transfer D level, so node D floatings are in high-impedance state, Fig. 5 is that circuit when node B2 of the invention is overturn is former Manage schematic diagram.
The third situation:Node C1 is hit the transient pulse for occurring 1 → 0 by high energy particle.It is when node C1 is overturn from 1 When 0, NMOS tube N2A is changed into cut-off from turning on, so node B1 floatings but can't overturn.Likewise, NMOS tube N4A is by turning on It is changed into cut-off, also only makes node D floatings, Fig. 6 is circuit theory schematic diagram when node C1 of the invention is overturn.
4th kind of situation:Node C2 is hit the transient pulse for occurring 1 → 0 by high energy particle.It is when node C2 is overturn by 1 When 0, NMOS tube N2B is changed into cut-off from turning on, so node B2 floatings but can't overturn.Likewise, NMOS tube N4B is by turning on It is changed into cut-off, also makes node D floatings, Fig. 7 is circuit theory schematic diagram when node C2 of the invention is overturn.
5th kind of situation:Node A is hit the transient pulse for occurring 1 → 0 by high energy particle.If node A is by high energy The strike of particle, the transient pulse for occurring 1 → 0, and PMOS P2A may be caused to turn on, but because node C1 makes for high level NMOS tube N2A conductings are obtained, and NMOS tube N2A has the driving force higher than PMOS P2A, node B1 can't be overturn.Together Sample, node B2 and node D will not also be overturn, and finish node A level recovers, and the node A that Fig. 8 is the present invention is overturn When circuit theory schematic diagram.
6th kind of situation:Node D is hit the transient pulse for occurring 0 → 1 by high energy particle.If node D is by high energy grain The strike of son, it is 1 that node D transient pulse is overturn by 0, only ends PMOS P3A, P3B, and cause node C1, node C2 Floating, can't produce level upset, and Fig. 9 is circuit theory schematic diagram when node D of the invention is overturn.
In summary, the upset of each redundant storage node is all without the upset for causing other any nodes, so that Whole latch structure will not be overturn, and the present invention is a latch structure that there is single node SEU to be immunized, and the present invention is solved The problem of anti-SEU.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, without departing from the technical principles of the invention, some improvement and deformation can also be made, these improve and deformed Also it should be regarded as protection scope of the present invention.

Claims (8)

1. the latch structure that a kind of anti-SEU is reinforced, it is characterised in that including memory cell, prefix logic circuit, the storage Unit includes tie point, the second branch road, the 3rd branch road, the 4th branch road, the 5th branch road, the 6th branch road, and the memory cell is also Including node A, node B1, node B2, node C1, node C2, node D, the node A is arranged in the tie point, institute State node B1 to be arranged on second branch road, the node B2 is arranged on the 3rd branch road, the node C1 is arranged at On 4th branch road, the node C2 is arranged on the 5th branch road, and the node D is arranged on the 6th branch road, The tie point is connected by the node A with second branch road, the 3rd branch road, the 6th branch road, described Second branch road is connected with the tie point, the 4th branch road respectively by the node B1, and the 3rd branch road passes through The node B2 is connected with the tie point, the 5th branch road respectively, and the 4th branch road passes through the node C1 points It is not connected with second branch road, the 6th branch road, the 5th branch road is by the node C2 respectively with the described 3rd Branch road, the 6th branch road are connected, the 6th branch road by the node D respectively with the 4th branch road, the described 5th Branch road, the tie point are connected, the output end of the prefix logic circuit respectively with the node B1, the node B2, The node C1, the node C2 are connected.
2. the latch structure that a kind of anti-SEU according to claim 1 is reinforced, it is characterised in that the tie point bag Tie point power supply, PMOS P1, NMOS tube N1A, NMOS tube N1B are included, the tie point power supply is with the PMOS P1's Source electrode is connected, and the drain electrode of the PMOS P1 is sequentially connected the node A, the drain electrode of the NMOS tube N1A, the NMOS tube N1A source electrode is connected with the drain electrode of the NMOS tube N1B, the source ground of the NMOS tube N1B, the grid of the PMOS P1 Pole is connected with the node D, and the grid of the NMOS tube N1A is connected with the node B1, the grid of the NMOS tube N1B It is connected with the node B2.
3. the latch structure reinforced according to a kind of any described anti-SEU of claim 1 or 2, it is characterised in that described second Branch road includes the second branch road power supply, PMOS P2A, NMOS tube N2A, the source of the second branch road power supply and the PMOS P2A Pole is connected, and the drain electrode of the PMOS P2A is sequentially connected the node B1, the drain electrode of the NMOS tube N2A, the NMOS tube N2A source ground, the grid of the PMOS P2A is connected with the node A, the grid of the NMOS tube N2A with it is described Node C1 is connected.
4. the latch structure reinforced according to a kind of any described anti-SEU of claims 1 to 3, it is characterised in that the described 3rd Branch road includes the 3rd branch road power supply, PMOS P2B, NMOS tube N2B, the source of the 3rd branch road power supply and the PMOS P2B Pole is connected, and the drain electrode of the PMOS P2B is sequentially connected the node B2, the drain electrode of the NMOS tube N2B, the NMOS tube N2B source ground, the grid of the PMOS P2B is connected with the node A, the grid of the NMOS tube N2B with it is described Node C2 is connected.
5. the latch structure reinforced according to a kind of any described anti-SEU of Claims 1-4, it is characterised in that the described 4th Branch road includes the 4th branch road power supply, PMOS P3A, NMOS tube N3A, the source of the 4th branch road power supply and the PMOS P3A Pole is connected, and the drain electrode of the PMOS P3A is sequentially connected the node C1, the drain electrode of the NMOS tube N3A, the NMOS tube N3A source ground, the grid of the PMOS P3A is connected with the node D, the grid of the NMOS tube N3A with it is described Node B1 is connected.
6. the latch structure reinforced according to a kind of any described anti-SEU of claim 1 to 5, it is characterised in that the described 5th Branch road includes the 5th branch road power supply, PMOS P3B, NMOS tube N3B, the source of the 5th branch road power supply and the PMOS P3B Pole is connected, and the drain electrode of the PMOS P3B is sequentially connected the node C2, the drain electrode of the NMOS tube N3B, the NMOS tube N3B source ground, the grid of the PMOS P3B is connected with the node D, the grid of the NMOS tube N3B with it is described Node B2 is connected.
7. the latch structure reinforced according to a kind of any described anti-SEU of claim 1 to 6, it is characterised in that the described 6th Branch road includes the 6th branch road power supply, PMOS P4, NMOS tube N4A, NMOS tube N4B, the 6th branch road power supply and the PMOS Pipe P4 source electrode is connected, and the drain electrode of the PMOS P4 is sequentially connected the node D, the drain electrode of the NMOS tube N4A, described NMOS tube N4A source electrode is connected with the drain electrode of the NMOS tube N4B, the source ground of the NMOS tube N4B, the PMOS P4 grid is connected with the node A, and the grid of the NMOS tube N4A is connected with the node C1, the NMOS tube N4B Grid be connected with the node C2.
8. the latch structure reinforced according to a kind of any described anti-SEU of claim 1 to 7, it is characterised in that described preposition Logic circuit includes the first logic circuit, the second logic circuit, the 3rd logic circuit, the 4th logic circuit, first logic Circuit, second logic circuit, the 3rd logic circuit, the 4th logic circuit respectively by 2 PMOSs, 2 NMOS tube is connected with each other and formed, the input of first logic circuit termination data input in, clock input clock andThe output of first logic circuit terminates the node B1;The input terminating data of second logic circuit is defeated Enter in, clock input clock andThe output of second logic circuit terminates the node B2;3rd logic The input termination data input of circuitClock input clock andThe output termination institute of 3rd logic circuit State node C1;The input termination data input of 4th logic circuitClock input clock andDescribed 4th The output of logic circuit terminates the node C2.
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CN104022773A (en) * 2014-06-24 2014-09-03 河海大学常州校区 DICE (dual interlocked storage cell)-based novel SEU (single event upset)-resistant reinforced SR latch
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CN102122950A (en) * 2011-01-10 2011-07-13 深圳市国微电子股份有限公司 High-speed low-power consumption latch device capable of resisting SEU (single event upset)
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CN108320766A (en) * 2018-02-05 2018-07-24 上海华虹宏力半导体制造有限公司 The high-performance double interlocking memory cell of soft fault preventing
CN111969998A (en) * 2020-08-03 2020-11-20 河海大学常州校区 Latch structure capable of resisting single event upset
CN111969998B (en) * 2020-08-03 2022-10-04 河海大学常州校区 Latch structure capable of resisting single event upset

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