CN107017878A - A kind of charge pump output circuit of phaselocked loop moderate resistance single-ion transient state - Google Patents
A kind of charge pump output circuit of phaselocked loop moderate resistance single-ion transient state Download PDFInfo
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- CN107017878A CN107017878A CN201710367821.2A CN201710367821A CN107017878A CN 107017878 A CN107017878 A CN 107017878A CN 201710367821 A CN201710367821 A CN 201710367821A CN 107017878 A CN107017878 A CN 107017878A
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- phaselocked loop
- switch pipe
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- 238000001914 filtration Methods 0.000 description 9
- 230000006872 improvement Effects 0.000 description 7
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/08—Details of the phase-locked loop
- H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
- H03L7/089—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal the phase or frequency detector generating up-down pulses
- H03L7/0891—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal the phase or frequency detector generating up-down pulses the up-down pulses controlling source and sink current generators, e.g. a charge pump
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Abstract
The present invention discloses a kind of charge pump output circuit of phaselocked loop moderate resistance single-ion transient state, including charge pump output switch pipe and wave filter, charge pump output switch pipe is arranged on charge pump outputs to access charge pump output current, also include switch control module and divider resistance module, one end of divider resistance connects charge pump output switch pipe respectively, switch control module, the other end connects control voltage end respectively, wave filter, charge pump output switch pipe also connects wave filter by switch control module, switch control module accesses the control signal of charge pump, break-make is controlled according to the control signal of the charge pump of access.The present invention realizes charge pump output control based on switch Self Adaptive Control, with anti-single particle transient response, and good with simple in construction, low manufacture cost, anti-single particle mapping, while the advantages of not limited by incident high energy particle energy size.
Description
Technical field
The present invention relates to phase lock control technical field, more particularly to a kind of charge pump of phaselocked loop moderate resistance single-ion transient state
Output circuit.
Background technology
The fast developments such as current space flight, aircraft industry, the size of integrated circuit technology constantly reduces, and radiation effect is to Department of Electronics
The influence for working condition of uniting is increasingly serious, and the influence of radiation effect possibly even causes system crash.The work under radiation environment
In the electronic system of work, single particle effect (Single Event Effect, SEE) influences outstanding to the working condition of electronic system
For Different Effects that are serious, being produced according to SEE to electronic system, single-particle inversion (Single Event can be classified as
Upset, SEU) effect, single event latch-up (Single Event Latch, SEL) effect and single-event transients (Single
Event Transient, SET) effect, wherein, SET is a kind of common single-particle radiation effect, and high energy particle is essentially from silver
River cosmic ray, solar particle events, nuclear explosion radiation etc..
Phaselocked loop (PLL) is the key component in analog circuit, for the clock signal needed for whole circuit system is provided.Lock
Charge pump (CP) is charged as " engine " of phaselocked loop under the control of phase frequency detector (PFD) output signal in phase ring
And electric discharge, the output end of charge pump is then connected to wave filter by transistor in phaselocked loop, but when energetic particle hits CP outputs
During end transistor, pulse current can be produced, and then filter output voltage can be influenceed.
It is typically the side using bonus point piezoresistance at present to improve the anti-SET performances of charge pump outputs, reducing SET effects
Method, this method can reduce influence of the pulse current to circuit working state to a certain extent, but bonus point piezoresistance method is needed
Big resistance is introduced, circuit performance can be not only influenceed, and chip area can be caused excessive；Another side of reduction SET effects
Method is to use current compensation circuit method, but this method introduces big resistance and Amplifier Design, so the program has design again
Miscellaneous, area problems of too, and the Amplifier Design used can introduce new SET sensitive nodes.
Chinese patent application（CN102291128A）A kind of charge pump and low pass filtered with Anti-single particle radiation circuit are disclosed
Ripple device assembly, the numerical control suppression circuit provided with controller and selector, is pressed down by the numerical control between charge pump and low pass filter
Circuit processed radiates the current interference pulse produced to single-particle and suppressed in real time, realizes complexity, and when the energy of high energy particle
After rise, its Flouride-resistani acid phesphatase effect can decline, i.e., anti-SET performances can be raised and declined with the energy of high energy particle.
The content of the invention
The technical problem to be solved in the present invention is that：The technical problem existed for prior art, the present invention provides one
Kind charge pump output control is realized based on switch Self Adaptive Control, with anti-single particle transient response, and it is simple in construction, be fabricated to
This low, anti-single particle mapping is good, and the charge pump for the phaselocked loop moderate resistance single-ion transient state not limited by high energy particle energy is defeated
Go out circuit.
In order to solve the above technical problems, technical scheme proposed by the present invention is：
A kind of charge pump output circuit of phaselocked loop moderate resistance single-ion transient state, including charge pump output switch pipe and wave filter,
Charge pump output switch pipe is arranged on charge pump outputs to access charge pump output current, in addition to switch control module and
Divider resistance module, one end of divider resistance connects charge pump output switch pipe, switch control module respectively, and the other end connects respectively
Control voltage end, wave filter are connect, charge pump output switch pipe also connects wave filter, switch control module by switch control module
The control signal of charge pump is accessed, break-make is controlled according to the control signal of the charge pump of access.
As a further improvement on the present invention：The switch control module includes controlling switch, the controlling switch connection
Into the charge pump output switch pipe and the filtration module between filter capacitor；When phaselocked loop is in charging and discharging state,
The controlling switch disconnects, and when phaselocked loop is in the lock state, the controlling switch closure.
As a further improvement on the present invention：The switch control module also includes the control being connected with the controlling switch
Signal generation unit, the control signal generation unit is respectively connected to the control signal of charge pump, and output control signal is to described
Controlling switch.
As a further improvement on the present invention：The control signal generation unit uses nor gate, the two of the nor gate
Individual input is respectively connected to two output signals of charge pump, the output control signal after NOR-operation.
As a further improvement on the present invention：The switch control module is additionally provided with direct-to-ground capacitance M4, by described right
Ground electric capacity M4 is grounded.
As a further improvement on the present invention：The charge pump output switch pipe is defeated including being separately positioned on charge pump two
Go out the first switch pipe M1 at end, second switch pipe M2, the first switch pipe M1 and be interconnected in M with the second switch pipe M2
Point, be connected respectively with one end of the divider resistance module by the M points and by the switch control module with it is described
Filtration module is connected.
As a further improvement on the present invention：The filtration module is RC wave filters, including resistance R1 and filter capacitor
C1, the resistance R1 one end connect the divider resistance module, control voltage end respectively, and the other end passes through the filter capacitor
C1 is grounded.
As a further improvement on the present invention：The output end of the filtration module is additionally provided with output capacitance C2.
Compared with prior art, the advantage of the invention is that：The charge pump of phaselocked loop moderate resistance single-ion transient state of the present invention is defeated
Go out circuit, when can work as phaselocked loop in charging, discharge condition, charge pump output current is only flowed into through divider resistance module and filtered
Module is filtered, and when phaselocked loop is in the lock state, the pulse of energetic particle hits charge pump outputs switching tube
Electric current can largely flow directly into filtration module and be filtered, and reduce the electricity that filtration module is flowed into through divider resistance module
Stream, so as to reduce the fluctuating range of control voltage, reduces the influence to filtration module output voltage, can be according to the shape of phaselocked loop
State realizes self-adaptive switch control, no matter and high energy particle energy size, can realize effective anti-single particle transient response.
Brief description of the drawings
Fig. 1 is the principle schematic diagram of the charge pump output circuit of the present embodiment phaselocked loop moderate resistance single-ion transient state.
Fig. 2 is the circuit structure of the charge pump output circuit of phaselocked loop moderate resistance single-ion transient state in the specific embodiment of the invention
Schematic diagram.
Fig. 3 is the operation principle schematic diagram under charge pump output device normal condition in the specific embodiment of the invention.
Fig. 4 is operation principle schematic diagram of the charge pump output device under SET effects in the specific embodiment of the invention.
Fig. 5 is the fluctuation schematic diagram of control voltage when conventional charge pump output circuit uses three kinds of specification current sources.
Fig. 6 is that the fluctuation of control voltage when using three kinds of specification current sources using the present embodiment charge pump output circuit is illustrated
Figure.
Fig. 7 is the statistical result schematic diagram of control voltage when using the present embodiment charge pump output circuit.
Marginal data：1st, charge pump output switch pipe；2nd, wave filter；3rd, switch control module；31st, controlling switch；32nd, control
Signal generation unit processed；4th, divider resistance module.
Embodiment
Below in conjunction with Figure of description and specific preferred embodiment, the invention will be further described, but not therefore and
Limit the scope of the invention.
As shown in figure 1, the charge pump output circuit of the present embodiment phaselocked loop moderate resistance single-ion transient state, including charge pump output
Switching tube 1 and wave filter 2, charge pump output switch pipe 1 are arranged on charge pump outputs to access charge pump output current, also
Including switch control module 3 and divider resistance module 4, one end of divider resistance connects charge pump output switch pipe 1, opened respectively
Control module 3 is closed, the other end connects control voltage end, wave filter 2 respectively, and charge pump output switch pipe 1 is also by switching control
Module 3 connects wave filter 2, and switch control module 3 accesses the control signal of charge pump, according to the control signal of the charge pump of access
Control break-make.Switch control module 3 includes controlling switch 31, and controlling switch 31 is connected to charge pump output switch pipe 1 and filtering
In device 2 between filter capacitor；When phaselocked loop is in charging and discharging state, controlling switch 31 disconnects, and when phaselocked loop is in lock
When determining state, controlling switch 31 is closed.
The present embodiment uses said structure, when phaselocked loop is in charging, discharge condition, i.e. the control signal UP of charge pump
Or DN is 1, charge pump output current, because now switch control module 3 is by disconnecting controlling switch 31 so that charge pump is defeated
Go out and current path is formed between switching tube 1 and divider resistance module 4, wave filter 2, then charge pump output current is only through divider resistance
Module 4 flows into wave filter 2 and is filtered, so as to not interfere with the locking process of circuit；
When phaselocked loop is in the lock state, i.e. control signal UP, DN of charge pump is 0, charge pump not output current, control
Switch 31 is closed, if the now charge pump output switch pipe 1 of energetic particle hits charge pump outputs, can produce pulse current,
Because now controlling switch 31 is closed, current path is formed between charge pump output switch pipe 1 and wave filter 2, then most of arteries and veins
Rush electric current and can flow directly into filter capacitor in wave filter 2 and be filtered, reduce and flow into wave filter 2 through divider resistance module 4
Electric current, so as to reduce the fluctuating range of control voltage, reduce the influence to the output voltage of wave filter 2.
The present embodiment uses above-mentioned charge pump output device, can realize self-adaptive switch control according to the state of phaselocked loop
System, no matter and high energy particle energy size, can realize effective anti-single particle transient response.
In the present embodiment, switch control module 3 also includes the control signal generation unit 32 being connected with controlling switch 31, control
Signal generation unit 32 processed is respectively connected to two output signals of charge pump, and output control signal is to controlling switch 31.In lock phase
In ring charge and discharge process, control signal UP=1 of charge pump or DN=1 are in locking process, the control of charge pump in phaselocked loop
Signal UP=0 processed and DN=0, control signal generation unit 32 produce control letter according to two output signals UPs of charge pump, DN
Number, cut-offfing for controlling switch 31 is controlled, then Self Adaptive Control can be realized according to phaselocked loop state, be in phaselocked loop
During lock-out state, start anti-single particle transient response function.
The charge pump output circuit of phaselocked loop moderate resistance single-ion transient state is as shown in Fig. 2 partial pressure in the specific embodiment of the invention
Resistive module 4 includes divider resistance R3, and wave filter 2 is RC wave filters, including resistance R1 and filter capacitor C1, the one of resistance R1
End connects divider resistance unit 3, control voltage end V_C respectively, and the other end is grounded by filter capacitor C1, divider resistance R2, electricity
Hinder R1 and filter capacitor C1 and constitute second order filter structure；Charge pump output switch pipe 1 includes being separately positioned on charge pump two
First switch pipe M1, second switch the pipe M2, first switch pipe M1 of individual output end are interconnected in M points with second switch pipe M2,
It is connected and is connected by switch control module 3 with filter capacitor C1 with divider resistance R2 one end respectively by M point.First
Switching tube M1 be specially PMOS transistor, second switch pipe M2 be NMOS tube transistor, respectively correspond to charge pump UP, DN control
Output end.Divider resistance module 4, wave filter 2 can also use other circuit structures to be filtered with further improve according to real needs
Ripple performance etc..
As shown in Fig. 2 control signal generation unit 32 specifically uses nor gate NOR1 in the present embodiment, nor gate NOR1's
Two inputs are respectively connected to two output signals of charge pump（UP、DN）, output end is connected to controlling switch 31, controlling switch
31 be specially the 3rd switching tube M3, and the 3rd switching tube M3 is specially nmos switch pipe, the 3rd switching tube M3 grid connection control
The output end of signal generation unit 32, drain electrode the output end M points of connection charge pump output switch pipe 1, divider resistance R2 respectively
One end, source electrode is connected between resistance R1 and filter capacitor C2.In phaselocked loop charge and discharge process, i.e. UP=1 or DN=1, this
When nor gate NOR1 be output as 0, then control the 3rd switching tube M3 to close；When phaselocked loop is in locking process, it is believed that electric charge
Pump output control signal UP=0 and DN=0, now nor gate NOR1 be output as 1, then control the 3rd switching tube M3 conducting.Filtering
Electric capacity C2 specifically uses bulky capacitor, to realize Large Copacity discharge and recharge.Controlling switch 31 can specifically use other according to the actual requirements
Form is switched, and control signal generation unit 32 can also use other forms according to the actual requirements, such as be produced by programme-control
Control signal etc..
In the present embodiment, switch control module 3 is additionally provided with direct-to-ground capacitance M4, is grounded by direct-to-ground capacitance M4.It is electric over the ground
It is specially NMOS tube to hold M4, and direct-to-ground capacitance M4 grid connects the 3rd switching tube M3 grid, control signal generation unit respectively
32 output end, direct-to-ground capacitance M4 drain electrode, source ground.The output end of wave filter 2 is additionally provided with output capacitance C2.
As shown in figure 3, when circuit shown in Fig. 2 is under normal table working condition, having the process of charging and discharging in phaselocked loop
In, during due to UP=1 or DN=1, nor gate NOR1 is output as 0, and the 3rd switching tube M3 is closed, and charge pump output current only passes through
Divider resistance R2 flows into loop filter, i.e., during phaselocked loop has charging and discharging, and the 3rd switching tube M3 is closed, and electric current is only
Loop filter is flowed into by divider resistance R2.
As shown in figure 4, circuit shown in Fig. 2 is in phase lock loop locks state, it is believed that control signal UP=0 and DN=0, now
Nor gate NOR1 is output as 1, the 3rd switching tube M3 conductings；As energetic particle hits charge pump output transistor M1, M2, produce
Pulse current the overwhelming majority by the 3rd switching tube M3 flow into bulky capacitor C1 so that reduce through divider resistance R2 flow into loop filter
When the electric current of ripple device 2, i.e. charge pump output transistor are by SET effects, control voltage V_C fluctuating range is reduced.
Further to verify the validity of the present embodiment foregoing circuit, by traditional charge pump based on electric resistance partial pressure method
The above-mentioned charge pump output circuit of circuit of output terminal, the present embodiment is respectively using the double Exponential current sources of three kinds of specifications（Peak value 1mA- half
High width 1nS, peak value 2mA- halfwidths 1nS, peak value 3mA- halfwidths 1nS）Bombarded, each control voltage V_C fluctuation result
As shown in Figure 5,6, the result of the traditional charge pump outputs circuit based on electric resistance partial pressure method of wherein Fig. 5 correspondences, Fig. 6 correspondences
The result of the above-mentioned charge pump output circuit of the present embodiment, A represents that voltage pulsation lower limit, B represent the voltage pulsation upper limit, and dy represents electricity
Press fluctuation range size；Fig. 7 is the statistical result to using the above-mentioned charge pump output circuit of the present embodiment in Fig. 6, wherein △ V1
The control voltage change of traditional charge pump outputs circuit based on electric resistance partial pressure method is corresponded to, △ V2 correspond to this implementation
The control voltage change of the above-mentioned charge pump output circuit of example.Charge pump outputs circuit is can be seen that using biography from Fig. 6,7 results
During the electric resistance partial pressure design of system, control voltage V_C fluctuation can linearly increase with the increase of bombarding current, and use this reality
When applying foregoing circuit, control voltage V_C fluctuation remains the undulating value of very little, i.e., can anti-single particle transient effect,
Reduce the fluctuating range of voltage.
Above-mentioned simply presently preferred embodiments of the present invention, not makees any formal limitation to the present invention.Although of the invention
It is disclosed above with preferred embodiment, but it is not limited to the present invention.Therefore, it is every without departing from technical solution of the present invention
Content, according to the technology of the present invention essence to any simple modifications, equivalents, and modifications made for any of the above embodiments, all should fall
In the range of technical solution of the present invention protection.
Claims (8)
1. a kind of charge pump output circuit of phaselocked loop moderate resistance single-ion transient state, including charge pump output switch pipe（1）And filter
Ripple device（2）, the charge pump output switch pipe（1）Charge pump outputs are arranged on to access charge pump output current, its feature
It is：Also include switch control module（3）And divider resistance module（4）, one end of the divider resistance connects described respectively
Charge pump output switch pipe（1）, the switch control module（3）, the other end connects control voltage end, the wave filter respectively
（2）, the charge pump output switch pipe（1）Also pass through the switch control module（3）Connect the wave filter（2）, it is described to open
Close control module（3）The control signal of charge pump is accessed, break-make is controlled according to the control signal of the charge pump of access.
2. the charge pump output circuit of phaselocked loop moderate resistance single-ion transient state according to claim 1, it is characterised in that：It is described to open
Close control module（3）Including controlling switch（31）, the controlling switch（31）It is connected to the charge pump output switch pipe（1）With
The wave filter（2）Between middle filter capacitor；When phaselocked loop is in charging and discharging state, the controlling switch（31）Disconnect, with
And when phaselocked loop is in the lock state, the controlling switch（31）Closure.
3. the charge pump output circuit of phaselocked loop moderate resistance single-ion transient state according to claim 2, it is characterised in that：It is described to open
Close control module（3）Also include and the controlling switch（31）The control signal generation unit of connection（32）, the control signal
Generation unit（32）The control signal of charge pump is respectively connected to, output control signal gives the controlling switch（31）.
4. the charge pump output circuit of phaselocked loop moderate resistance single-ion transient state according to claim 3, it is characterised in that：The control
Signal generation unit processed（32）Using nor gate, two inputs of the nor gate are respectively connected to two output letters of charge pump
Number, the output control signal after NOR-operation.
5. the charge pump output circuit of phaselocked loop moderate resistance single-ion transient state according to claim 4, it is characterised in that：It is described to open
Close control module（3）Direct-to-ground capacitance M4 is additionally provided with, is grounded by the direct-to-ground capacitance M4.
6. the charge pump output circuit of the phaselocked loop moderate resistance single-ion transient state according to any one in Claims 1 to 5, its
It is characterised by：The charge pump output switch pipe（1）Including be separately positioned on two output ends of charge pump first switch pipe M1,
Second switch pipe M2, the first switch pipe M1 and the second switch pipe M2 are interconnected in M points, are distinguished by the M points
With the divider resistance module（4）One end connection and pass through the switch control module（3）With the wave filter（2）Even
Connect.
7. the charge pump output circuit of the phaselocked loop moderate resistance single-ion transient state according to any one in Claims 1 to 5, its
It is characterised by：The wave filter（2）For one end point of RC wave filters, including resistance R1 and filter capacitor C1, the resistance R1
The divider resistance module is not connected（4）, control voltage end, the other end is grounded by the filter capacitor C1.
8. the charge pump output circuit of the phaselocked loop moderate resistance single-ion transient state according to any one in Claims 1 to 5, its
It is characterised by：The wave filter（2）Output end be additionally provided with output capacitance C2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710367821.2A CN107017878B (en) | 2017-05-23 | 2017-05-23 | Charge pump output circuit for resisting single-particle transient in phase-locked loop |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710367821.2A CN107017878B (en) | 2017-05-23 | 2017-05-23 | Charge pump output circuit for resisting single-particle transient in phase-locked loop |
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| CN107017878A true CN107017878A (en) | 2017-08-04 |
| CN107017878B CN107017878B (en) | 2020-07-21 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1269068A (en) * | 1997-08-28 | 2000-10-04 | 艾利森公司 | Charge pump steering systems and methods for loop filters of phase locked loops |
| CN101123434A (en) * | 2006-03-31 | 2008-02-13 | 瑞昱半导体股份有限公司 | Charge pump circuit, frenquency signal generator and its related method |
| CN101674078A (en) * | 2009-06-09 | 2010-03-17 | 中国人民解放军国防科学技术大学 | Low-pass filter for enhancing radiation resisting capability of charge pump |
| CN102291128A (en) * | 2011-06-28 | 2011-12-21 | 电子科技大学 | Charge pump and low-pass filter component with anti-single particle radiation circuit |
| CN102983857A (en) * | 2012-11-15 | 2013-03-20 | 中国航天科技集团公司第九研究院第七七一研究所 | Phase-locked loop resistant to single particle transient state |
| CN104767523A (en) * | 2015-04-09 | 2015-07-08 | 哈尔滨工业大学 | Second-order switch low-pass filter in charge pump phase-locked loop and locking method adopting second-order switch low-phase filter to achieve loop circuit |
-
2017
- 2017-05-23 CN CN201710367821.2A patent/CN107017878B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1269068A (en) * | 1997-08-28 | 2000-10-04 | 艾利森公司 | Charge pump steering systems and methods for loop filters of phase locked loops |
| CN101123434A (en) * | 2006-03-31 | 2008-02-13 | 瑞昱半导体股份有限公司 | Charge pump circuit, frenquency signal generator and its related method |
| CN101674078A (en) * | 2009-06-09 | 2010-03-17 | 中国人民解放军国防科学技术大学 | Low-pass filter for enhancing radiation resisting capability of charge pump |
| CN102291128A (en) * | 2011-06-28 | 2011-12-21 | 电子科技大学 | Charge pump and low-pass filter component with anti-single particle radiation circuit |
| CN102983857A (en) * | 2012-11-15 | 2013-03-20 | 中国航天科技集团公司第九研究院第七七一研究所 | Phase-locked loop resistant to single particle transient state |
| CN104767523A (en) * | 2015-04-09 | 2015-07-08 | 哈尔滨工业大学 | Second-order switch low-pass filter in charge pump phase-locked loop and locking method adopting second-order switch low-phase filter to achieve loop circuit |
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| CN107017878B (en) | 2020-07-21 |
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