CN110471485A - A kind of total dose effect reinforcing circuit based on segmented current compensation - Google Patents
A kind of total dose effect reinforcing circuit based on segmented current compensation Download PDFInfo
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- CN110471485A CN110471485A CN201910811398.XA CN201910811398A CN110471485A CN 110471485 A CN110471485 A CN 110471485A CN 201910811398 A CN201910811398 A CN 201910811398A CN 110471485 A CN110471485 A CN 110471485A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/625—Regulating voltage or current wherein it is irrelevant whether the variable actually regulated is ac or dc
Abstract
A kind of total dose effect reinforcing circuit based on segmented current compensation, corresponding compensation electric current can be exported according to the variation of irradiation dose size, including accumulated dose detection module, Logic control module and segmented compensation current generating module, accumulated dose detection module includes the different accumulated dose detection branch of n item irradiation detection dose point, and every accumulated dose detection branch output signal when detecting the irradiation dose not less than its irradiation detection dose point is overturn；Segmented compensation current generating module includes that n item compensation electric current corresponding with n accumulated dose detection branch generates branch；Logic control module generates n logic control signal according to the output signal of n accumulated dose detection branch and controls corresponding n item compensation electric current generation branch respectively；When the output signal overturning for having accumulated dose detection branch described in i item, Logic control module, which controls corresponding i item compensation electric current and generates, has at least one compensation electric current generation branch to work and generate compensation electric current in branch.
Description
Technical field
The invention belongs to power electronics fields, are related to a kind of total dose effect reinforcing electricity based on segmented current compensation
Road.
Background technique
In the space industry application scenarios constantly extended, integrated circuit inevitably works in radiation environment.Spoke
According to caused total dose effect, additional electron hole pair can be introduced in the gate oxide and field oxide of metal-oxide-semiconductor, in electricity
Under field action, electron mobility is higher, is easy to be drifted away from material, and hole is oxidized easily the capture of the trap in layer, in turn
It is accumulated in oxide layer.The charge accumulated in gate oxide will affect the threshold voltage of metal-oxide-semiconductor, the electricity accumulated in field oxide
Lotus can introduce drain passageway, and metal-oxide-semiconductor is made to generate additional leakage current.
With the development of process technology, device feature size constantly reduces, and gate oxide thickness also constantly reduces, accumulated dose
Influence of the effect to metal-oxide-semiconductor threshold voltage also becomes smaller therewith.But field oxide thickness goes out not with the diminution of characteristic size
It now substantially reduces, so that the variation of metal-oxide-semiconductor leakage current is less, and the leakage current is not controlled by grid voltage.It is existing total
Dosage effect Scheme of Strengthening is mostly reinforced from the angle that device architecture, technique, laying out pattern are routed, for example STI isolation adds
Gu, Halo structure reinforcing, the reinforcing based on silicon-on-insulator etc., complicated for operation and flexibility is little.
Summary of the invention
The total dose effect caused by irradiating leads to the problem of leakage current in analog circuit, and the present invention proposes one kind
Total dose effect based on segmented current compensation reinforces circuit, passes through the change for the irradiation dose size being subject to according to integrated circuit
Change, exports corresponding compensation electric current, the NMOS tube branch for treating radiation sensitive in reinforcing circuit carries out segmented compensation, and then reaches
The purpose of reinforcing.
The technical solution of the present invention is as follows:
A kind of total dose effect reinforcing circuit based on segmented current compensation, including accumulated dose detection module, logic control
Module and segmented compensation current generating module,
The accumulated dose detection module includes the different accumulated dose detection branch of n item irradiation detection dose point, and n is positive whole
Number, accumulated dose detection branch output signal when detecting the irradiation dose not less than its irradiation detection dose point are overturn；
The segmented compensation current generating module includes n item compensation electric current corresponding with the n accumulated dose detection branch
Generate branch；
The Logic control module generates n logic control letter according to the output signal of the n accumulated dose detection branch
The corresponding n item compensation electric current number is controlled respectively generates branch；
When the output signal overturning for having accumulated dose detection branch described in i item, the Logic control module is for control pair
The i item compensation electric current answered, which generates, has at least one compensation electric current generation branch to work and generate compensation electric current in branch, i is positive whole
Number and i ∈ [1, n]；
The output end that the n item compensation electric current generates branch connects the output end that the total dose effect reinforces circuit.
Specifically, the accumulated dose detection branch includes the first PMOS tube and the first NMOS tube, the source electrode of the first PMOS tube
Supply voltage is connected, the grid and source electrode of grid the first NMOS tube of connection are simultaneously grounded, the leakage of drain electrode the first NMOS tube of connection
Pole and output end as the accumulated dose detection branch.
Specifically, it includes the first PMOS tube ruler in corresponding accumulated dose detection branch that the compensation electric current, which generates branch,
Very little identical second PMOS tube, the source electrode of the second PMOS tube connect supply voltage, and grid connects the Logic control module root
According to the logic control signal that the output signal of corresponding accumulated dose detection branch generates, drain electrode is generated as the compensation electric current
The output end of branch.
The operation principle of the present invention is that: for the NMOS tube branch wait reinforce radiation sensitive in circuit, each irradiation is quick
The NMOS tube branch of sense connects a total dose effect proposed by the present invention and reinforces circuit, and total dose effect reinforces n item in circuit
The irradiation different accumulated dose detection branch of detection dose point for detecting current irradiation dose, when irradiation dose not less than wherein certain
When the irradiation of one or more accumulated dose detection branch detects dose point, corresponding accumulated dose detection branch output switching activity.And it is every
The all corresponding compensation electric current of one accumulated dose detection branch generates branch, theoretically when accumulated dose detection branch output switching activity
When, corresponding compensation electric current, which generates branch, will generate compensation electric current for offsetting leakage current, however for synthesis precision and
Efficiency, the invention proposes Logic control modules, and when there is a plurality of accumulated dose detection branch output switching activity, Logic control module is only
Corresponding a plurality of compensation electric current, which can be controlled, and generated at least one work in branch, and the compensation electric current preferably generated is maximum
It compensates electric current and generates branch.The present invention passes through for the NMOS tube branch leakage current problem wait reinforce radiation sensitive in circuit
Segmented compensation electric current is introduced, offsets the influence of leakage current, and then achieve the purpose that resistant to total dose effect.
The invention has the benefit that for working in the analog circuit in radiation environment, it is proposed by the present invention to be based on dividing
The total dose effect of section current compensation reinforces circuit, can be according to the variation of irradiation dose, to wait reinforce radiation sensitive in circuit
NMOS tube branch export segmented compensation electric current, treat reinforcing to offset leakage current caused by total dose effect, and then reach
The purpose of circuit progress total dose effect reinforcing；The present invention also has that accuracy is good, flexibility is high, applicability is wide, sectional tune
The characteristics of section.
Detailed description of the invention
Fig. 1 is the entire block diagram that a kind of total dose effect based on segmented current compensation proposed by the present invention reinforces circuit.
Fig. 2 is that a kind of total dose effect based on segmented current compensation proposed by the present invention reinforces total dose effect in circuit
A kind of realization structural schematic diagram of detection module in embodiment.
Fig. 3 is that a kind of total dose effect based on segmented current compensation proposed by the present invention reinforces segmented compensation electricity in circuit
Flow a kind of realization structural schematic diagram of generation module in embodiment.
Fig. 4 is the specific framework that a kind of total dose effect based on segmented current compensation proposed by the present invention reinforces circuit
Figure.
Specific embodiment
Attached drawing of the invention is used to provide to further understand invention, and the embodiment of the present invention and its explanation are for explaining
The present invention, in the following with reference to the drawings and specific embodiments detailed description of the present invention working principle.
For leakage current problem, the present invention treats from the angle of current subsection compensation and reinforces radiation sensitive in circuit
Branch carries out the reinforcing of Flouride-resistani acid phesphatase effect.It is a kind of accumulated dose effect based on segmented current compensation proposed by the present invention as shown in Figure 1
The entire block diagram of circuit should be reinforced, carries out total dose effect for realizing the NMOS tube branch for reinforcing radiation sensitive in circuit is treated
It reinforces, including accumulated dose detection module, Logic control module, segmented compensation current generating module.When circuit work is in irradiation ring
Under border, irradiation dose is detected by accumulated dose detection module, the output of the accumulated dose detection branch of output switching activity is believed
Number as detection signal be output to Logic control module, after logical process, further export to segmented compensation electric current produce
Raw module generates segmented compensation electric current, and exports to the NMOS tube branch wait reinforce radiation sensitive in circuit, to treat reinforcing
Circuit is reinforced.
Accumulated dose detection module, including the independent accumulated dose detection branch of n item, the irradiation inspection of every accumulated dose detection branch
Dose point is different, accumulated dose detection branch output signal when detecting the irradiation dose not less than its irradiation detection dose point
Overturning.A kind of way of realization of accumulated dose detection branch is given as shown in Figure 2, main structure is an input end grounding
Phase inverter, the circuit connecting mode of each branch correspond to identical.By taking accumulated dose detection branch i as an example, the first PMOS tube in the branch
MPiSource electrode meet power level VDD.First PMOS tube MPiGrid and first NMOS tube of branch MNiGrid, source electrode be connected,
It is connected to ground terminal GND jointly.First PMOS tube MPiDrain electrode and the first NMOS tube MNiDrain electrode be connected, and as the defeated of the branch
V outDI_iIt is transmitted to the correspondence input port of Logic control module.
By taking irradiation dose is more than the irradiation detection dose point of accumulated dose detection branch i as an example, under radiation environment, accumulated dose effect
It should can make the first NMOS tube M of accumulated dose detection branch iNiInside start to generate parasitic aerial drainage channel, with the increasing of irradiation dose
Greatly, leakage current therein can be also gradually increased, until the first NMOS tube MNiLeakage current be greater than the first PMOS tube MPiWork
When making electric current, it is 0 that output, which is forced overturning,.
The corresponding irradiation dose of accumulated dose detection branch output switching activity, i.e., the in irradiation detection dose point, with every branch
The size of one PMOS tube is related, and size is bigger, and detection range is bigger, and size is smaller, and detection accuracy is higher, for balance detection model
It encloses and detection accuracy, can choose the first PMOS tube of correspondingly-sized.The output signal of accumulated dose detection module, will be as input
Signal is sent to Logic control module.Size wait reinforce NMOS tube sensitive in circuit has determined that accumulated dose detection module is each
NMOS tube size in branch.
Segmented compensation current generating module, including n item compensation electric current generation branch, every branch and Logic control module
Output port corresponds, and the logic control signal of module output controlled by logic controls its working condition.It provides as shown in Figure 3
Compensation electric current generates a kind of way of realization of branch, and it is identical that every compensation electric current generates branch structure, comprising one second
PMOS tube, circuit connecting mode correspond to identical.For compensating electric current and generate branch i, second PMOS tube of branch MPCiSource
Pole meets power level VDD；Grid output port V corresponding with Logic control moduleDO_iIt is connected；Drain electrode and other branches second
The drain electrode of PMOS tube is shorted, and is connected to radiation sensitive in solid circuit to be added collectively as the output that total dose effect reinforces circuit
NMOS tube branch to be compensated.
Second PMOS tube of segmented compensation current generating module and the first of corresponding accumulated dose detection branch in the present embodiment
PMOS tube size is identical, then when the irradiation that irradiation dose is just accumulated dose detection branch i detects dose point, corresponding compensation
Electric current, which generates the compensation electric current that branch i is generated, can just offset leakage current.
Logic control module, total n input port, the output with n logic control branch correspond；Total n output
Port, after logic control is handled, output to one-to-one segmented compensation electric current produces the input signal of Logic control module
N branch in raw module.Without under radiation parameter, the input signal of logic control port is 1, and the input signal is via logic
Control processing, each output port also export 1 to compensation current generating module.Under radiation environment, when irradiation dose reaches accumulated dose
When the irradiation of detection branch i detects dose point, the output switching activity of the branch, i.e. the input terminal overturning of Logic control module branch i,
And then handled through logic control, treated signal is transmitted to the branch i of segmented compensation current generating module through output port,
The working condition for generating branch i to compensation electric current controls.The input of different branch is believed in logic control proposed by the present invention
It number is handled, outputs control signals to segmented compensation current generating module, deploy the work that each compensation electric current generates branch, it is real
Existing segmented compensation.Different irradiation doses can be defeated in accumulated dose detection module according to the difference of corresponding irradiation detection dose point
Different signal out, the processing through Logic control module generate corresponding input in segmented compensation current generating module.The input
Signal makes to compensate electric current generation branch work accordingly, that is, opens the PMOS tube of the branch, and then generate one and leakage current
Equal compensation electric current treats the NMOS tube branch progress segmented current compensation for reinforcing radiation sensitive in circuit, offsets accumulated dose
The influence of effect achievees the purpose that total dose effect is reinforced.
In order to enable the compensation electric current generated is offset as far as possible with discharge current, Logic control module of the invention is using such as
Lower scheme: when the output signal overturning for having i accumulated dose detection branch, Logic control module controls corresponding i item compensation electricity
There is at least one compensation electric current to generate branch in the raw branch of miscarriage to work and generate compensation electric current, i is positive integer and i ∈ [1, n].
If irradiation dose is just the irradiation detection dose point of accumulated dose detection branch i, Logic control module only controls corresponding benefit
It repays electric current and generates branch i work, that is, can produce the compensation electric current equal with leakage current.If irradiation dose is accumulated dose detection branch
When the median of the irradiation detection dose point of road i and accumulated dose detection branch i+1, Logic control module controls output signal overturning
Multiple accumulated dose detection branch correspond to multiple compensation electric currents and generate at least one work in branches, generate as close possible to leakage
The compensation electric current of electric current.
When the application present invention carries out radiation hardened to circuit, can be adjusted accordingly according to specific circuit requirements
It is whole: when to compensation current precision it is more demanding, be adjusted branch in PMOS tube size it is as small as possible；When to the big of compensation electric current
It is small more demanding, i.e., circuit is reinforced under larger irradiation dose, then can be realized by increasing number of branches.
The present invention can treat the NMOS tube branch for reinforcing radiation sensitive in circuit more accurately under different irradiation doses
Road carries out segmented current compensation, to offset the leakage current of total dose effect generation, is finally reached the mesh of total dose effect reinforcing
's.In addition, the present invention also has the characteristics that universality, sectional are adjusted.
Angle of the present invention from circuit, the segmented compensation based on electric current export correspondingly sized for different irradiation doses
Compensation electric current, circuit is reinforced.It is reinforced with traditional angle being routed from device architecture, technique, laying out pattern
Scheme compare, flexibility is higher, and applicability is wider.
Those skilled in the art disclosed the technical disclosures can make various do not depart from originally according to the present invention
Other various specific variations and combinations of essence are invented, such as increase driving capability enhancing module, replacement accumulated dose in output end
Irradiation dose detection circuit in detection module, using various forms of logic control elements etc., these variations and combinations are still
Within protection scope of the present invention.
Claims (3)
1. it is a kind of based on segmented current compensation total dose effect reinforce circuit, which is characterized in that including accumulated dose detection module,
Logic control module and segmented compensation current generating module,
The accumulated dose detection module includes the different accumulated dose detection branch of n item irradiation detection dose point, and n is positive integer, institute
Accumulated dose detection branch output signal when detecting the irradiation dose not less than its irradiation detection dose point is stated to overturn；
The segmented compensation current generating module includes that n item compensation electric current corresponding with the n accumulated dose detection branch generates
Branch；
The Logic control module generates n logic control signal point according to the output signal of the n accumulated dose detection branch
The corresponding n item compensation electric current is not controlled generates branch；
When the output signal overturning for having accumulated dose detection branch described in i item, the Logic control module is for controlling corresponding i
Item compensation electric current, which generates, to be had at least one compensation electric current generation branch to work and generates compensation electric current in branch, i is positive integer and i
∈ [1, n]；
The output end that the n item compensation electric current generates branch connects the output end that the total dose effect reinforces circuit.
2. the total dose effect according to claim 1 based on segmented current compensation reinforces circuit, which is characterized in that described
Accumulated dose detection branch includes the first PMOS tube and the first NMOS tube, and the source electrode of the first PMOS tube connects supply voltage, grid
It connects the grid of the first NMOS tube and source electrode and is grounded, the drain electrode of drain electrode the first NMOS tube of connection is simultaneously examined as the accumulated dose
Survey the output end of branch.
3. the total dose effect according to claim 2 based on segmented current compensation reinforces circuit, which is characterized in that described
Compensating electric current and generating branch includes identical second PMOS tube of the first PMOS tube size in corresponding accumulated dose detection branch,
The source electrode of second PMOS tube connects supply voltage, and grid connects the Logic control module and detects branch according to corresponding accumulated dose
The logic control signal that the output signal on road generates drains and generates the output end of branch as the compensation electric current.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109917271A (en) * | 2019-03-13 | 2019-06-21 | 电子科技大学 | A kind of total dose effect detection circuit |
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| CN103208301A (en) * | 2013-03-26 | 2013-07-17 | 深圳市国微电子有限公司 | Follow-up dose accommodating device for radiation-proof storage |
| CN108037789A (en) * | 2017-11-16 | 2018-05-15 | 中国科学院微电子研究所 | A kind of reinforcement means of radioresistance band-gap reference circuit |
| US20180299915A1 (en) * | 2017-04-18 | 2018-10-18 | Richwave Technology Corp. | Power supply with low variation of total radiated power |
| CN109917271A (en) * | 2019-03-13 | 2019-06-21 | 电子科技大学 | A kind of total dose effect detection circuit |
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Patent Citations (4)
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|---|---|---|---|---|
| CN103208301A (en) * | 2013-03-26 | 2013-07-17 | 深圳市国微电子有限公司 | Follow-up dose accommodating device for radiation-proof storage |
| US20180299915A1 (en) * | 2017-04-18 | 2018-10-18 | Richwave Technology Corp. | Power supply with low variation of total radiated power |
| CN108037789A (en) * | 2017-11-16 | 2018-05-15 | 中国科学院微电子研究所 | A kind of reinforcement means of radioresistance band-gap reference circuit |
| CN109917271A (en) * | 2019-03-13 | 2019-06-21 | 电子科技大学 | A kind of total dose effect detection circuit |
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| CN109917271A (en) * | 2019-03-13 | 2019-06-21 | 电子科技大学 | A kind of total dose effect detection circuit |
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