CN104516279B - The control circuit and control method of quick peripheral assembly interconnecting device - Google Patents
The control circuit and control method of quick peripheral assembly interconnecting device Download PDFInfo
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- CN104516279B CN104516279B CN201310466116.XA CN201310466116A CN104516279B CN 104516279 B CN104516279 B CN 104516279B CN 201310466116 A CN201310466116 A CN 201310466116A CN 104516279 B CN104516279 B CN 104516279B
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- signal
- peripheral assembly
- interconnecting device
- parameter
- quick peripheral
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
Abstract
A kind of control circuit of quick peripheral assembly interconnecting device, includes a power detecting unit and a parameter adjustment unit.The power detecting unit is coupled to a radio communications transmitter, and for the spectrum intensity value on the output spectrum for detecting the radio communications transmitter.The parameter adjustment unit is coupled to the power detecting unit, and for producing at least one control signal according to the spectrum intensity value, and adaptively adjusts the parameter of the quick peripheral assembly interconnecting device according at least one control signal.
Description
Technical field
The present invention can reduce radio communication about a kind of controlling mechanism of quick peripheral assembly interconnecting device, espespecially one kind
The control circuit and control method of the quick peripheral assembly interconnecting device of interference.
Background technology
Quick peripheral assembly interconnecting (peripheral component interconnect express, PCI-E) device
Primary operational frequency position on 1.25GHz, and different frequency can be produced according to the integral multiple of the primary operational frequency
Other harmonic waves (Harmonic), for example, appear in the second harmonic on 2.5GHz (that is, 1.25x2GHz).
However, because the transmission band of Wireless Fidelity (wireless fidelity, Wi-Fi) also is located near 2.5GHz,
Therefore when the second harmonic of frequency 2.5GHz is radiated or be coupled in the transmission path of Wi-Fi circuit via different paths,
The surging (Spur) of 2.5GHz occurs on the output spectrum of Wi-Fi circuit, Fig. 1 is refer to, Fig. 1 is the output of Wi-Fi circuit
Frequency spectrum is subject to the schematic diagram of an example of PCI-E devices interference.In Fig. 1, dotted line 101 represents electromagnetic interference
The upper limit of (Electromagnetic interference, EMI) institute's specification.As shown in figure 1, due to dry by PCI-E devices
The relation disturbed, can see in the place of 2.5GHz and has exceeded dotted line 101 with a surging, thus cannot be by electromagnetic interference
Test.
Accordingly, it would be desirable to a kind of second harmonic positioned at 2.5GHz that can reduce caused by PCI-E devices, but energy again simultaneously
Enough maintain the mechanism of the transmission quality of PCI-E devices.
The content of the invention
It is an object of the invention to propose that one kind is applied to quick peripheral assembly interconnecting device reducing/eliminates fast peripheral
The control circuit and control method of the radio communication interference caused by component interconnection means, it is above-mentioned to solve the problems, such as.
According to one embodiment of the invention, it discloses a kind of control circuit of quick peripheral assembly interconnecting device, includes
One power detecting unit and a parameter adjustment unit.The power detecting unit is coupled to a radio communications transmitter, and uses
Come the spectrum intensity value on the output spectrum for detecting the radio communications transmitter.The parameter adjustment unit is coupled to the power
Detecting unit, and for producing at least one control signal according to the spectrum intensity value, and according at least one control news
Number adaptively adjust the parameter of the quick peripheral assembly interconnecting device.
According to another embodiment of the present invention, it discloses a kind of control method of PCI-E devices, includes：Detect the nothing
A spectrum intensity value on one output spectrum of line communications transmitter；And an at least control is produced according to the spectrum intensity value
Signal, and the parameter of the quick peripheral assembly interconnecting device is adaptively adjusted according at least one control signal.
Control circuit and control method through PCI-E devices proposed by the invention can reduce radio communication interference,
But it is able to maintain that the transmission quality of PCI-E devices again simultaneously.
Brief description of the drawings
Fig. 1 is subject to the schematic diagram of an example of PCI-E devices interference for the output spectrum of Wi-Fi circuit.
Fig. 2 is the schematic diagram of an embodiment of the control circuit that the present invention is applied to PCI-E devices.
Fig. 3 is the schematic diagram of the amplifier 231 shown in Fig. 2 and reference voltage generator 232.
Fig. 4 is the flow chart of an embodiment of the control method that the present invention is applied to PCI-E devices.
Wherein, description of reference numerals is as follows：
200 control circuits
210 power detecting units
220 parameter adjustment units
212 frequency mixers
214 power detectors
213 variable gain amplifiers
215 simulate to digital signal converter
231 amplifiers
232 reference voltage generators
20 radio communications transmitters
21 quick peripheral assembly interconnecting devices
Specific embodiment
Some vocabulary have been used in the middle of specification and claims to censure specific component.Those skilled in the art
, it is to be appreciated that hardware manufacturer may call same component with different nouns.This specification and claims book is simultaneously
Not in the way of the difference of title is used as distinguishing component, but the difference with component functionally is used as the criterion distinguished.
In the whole text specification and claims when mentioned in "comprising" be an open term, therefore should be construed to " include but
It is not limited to ".In addition, " coupling " one word herein comprising it is any directly and indirectly electrical connection.Therefore, if described in text
One first device is coupled to a second device, then representing the first device can directly be electrically connected in the second device, or pass through
Other devices or connection means are electrically connected to the second device indirectly.
Inventive conception is that carrying out the output of detecting wireless communicator (such as Wi-Fi circuit) through primary Ioops circuit
Interference signal (for example, a surging) on frequency spectrum, it is just dynamic when the upper limit for disturbing signal to exceed electromagnetic interference institute specification is detected
The chip internal parameter of PCI-E device of the state ground adjustment near radio communication device, it is humorous with reduce PCI-E devices second
The amount of radiation (signal strength) of ripple, so reduce PCI-E devices second harmonic the transmission signal of radio communication device is produced
Raw interference.
Fig. 2 is refer to, Fig. 2 is the schematic diagram of an embodiment of the control circuit that the present invention is applied to PCI-E devices.Control
Circuit 200 is coupled to PCI-E devices 21, and includes a power detecting unit 210 and a parameter adjustment unit 220.Work(
Rate detecting unit 210 is coupled to a radio communications transmitter (wireless communication transmitter) 20, lifts
Example for, radio communications transmitter 20 can be bluetooth transmitters, W-Fi transmitters or any transmission band convergence or comprising
The transmitter of the frequency of the second harmonic of PCI-E devices.Power detecting unit 210 is used for the defeated of detecting wireless communications transmitter 20
Go out interference suffered on frequency spectrum SPCTM, such as surging on output spectrum SPCTM.Power detecting unit 210 will be detected
Interference signal INF is converted to a characteristic value P, and wherein characteristic value P is used to the intensity for indicating to disturb signal INF.Parameter adjustment unit
220 are coupled to power detecting unit 210, adaptively to adjust the parameter of PCI-E devices 21 according to characteristic value P.Lift
For example, with the upper limit of electromagnetic interference institute specification can be compared characteristic value P by parameter adjustment unit 220, so may know that institute
The specification whether the interference signal INF being mapped to has exceeded electromagnetic interference is detectd, if it exceeds if the specification of electromagnetic interference, then parameter
Adjustment unit 220 just needs to adjust the inner parameter (parameter such as such as amplitude and impedance) of PCI-E devices 21, to reduce interference news
The intensity of number INF, and then cause that the transmission signal of radio communications transmitter 20 is able to meet the specification of electromagnetic interference.
Specifically, power detecting unit 210 includes the power detector 214 of a frequency mixer (mixer) 212 and.
Frequency mixer 212 is used for for the interference signal INF for wanting detecting in output spectrum SPCTM carrying out frequency reducing, for example, drop to fundamental frequency
(baseband), to carry out follow-up characteristic value conversion, for example, frequency mixer 212 receives a local oscillations signal LO, and
The frequency (such as 2.5GHz) of the frequency approach of local oscillations signal LO or the interference signal INF equal to desired detecting, therefore, by
It is mixed with the output signal of radio communications transmitter 20 by local oscillations signal LO, just can obtains disturbing signal in fundamental frequency
INF.Power detector 214 is coupled to frequency mixer 212, and can include a variable gain amplifier (variable gain
Amplifier, VGA) 213 and one simulation to digital signal converter (analog-to-digital converter, ADC)
215.The gain G that variable gain amplifier 213 is adjusted according to an adaptability changes to simulation to numeral the signal after frequency reducing
Signal adapter 215 can normal process signal strength scope, with avoid signal too abortion resolution estranged be too low to identification
Situation, or signal is too big and be modeled to digital signal converter 215 and block (clipping) and the situation of distortion.Simulation
The signal that variable gain amplifier 213 is exported further then is converted into characteristic value P to digital signal converter 215.Please note
Meaning, variable gain amplifier 213 and one kind that the combination of simulation to digital signal converter 215 is only power detector of the present invention
Implementation method, to obtain desired spectrum intensity value, (it can be simulation detecting knot to any interference signal that can be detected after frequency reducing
Fruit or digital detecting result) framework may be utilized to realize power detector 214.Change in these designs belongs to this hair
Bright category.
Additionally, after with the upper limit of electromagnetic interference institute specification be compared characteristic value P by parameter adjustment unit 220, meeting
At least one control signal is produced according to comparative result, to adjust the parameter inside PCI-E devices 21, for example, this is at least
One control signal can include one first control signal S_IMP and/or one second control signal S_AMP, wherein the first control
Signal S_IMP is used for adjusting the impedance parameter N inside PCI-E devices 21, and the second control signal S_AMP is used for adjusting PCI-
Amplitude parameter K inside E devices 21.For example, PCI-E devices 21 can include an amplifier 231 (for example, one differential puts
Big device) and a reference voltage generator 232.Fig. 3 is referred to, Fig. 3 is that the amplifier 231 shown in Fig. 2 is produced with reference voltage
The schematic diagram of device 232.Amplifier 231 has an a variable load R and variable bias current source C, and reference voltage is produced
Device 232 provides one and supplies voltage VDD to amplifier 231.Differential output transmission signal TXP, TXN of amplifier 231.The present embodiment
In, the first control signal S_IMP can control variable load R to adjust impedance parameter N；Second control signal S_AMP can be controlled
Variable bias current source C processed or supply voltage VDD adjust amplitude parameter K.This be note that only as example purposes of discussion,
And be not used to as a restrictive condition of the invention.
After parameter inside adjustment PCI-E devices 21, power detecting unit 210 can again obtain the characteristic value after adjustment
With the upper limit of electromagnetic interference institute specification be compared characteristic value P' again then by P', parameter adjustment unit 220, so constantly weighs
It is multiple, untill characteristic value P' is less than the upper limit of electromagnetic interference institute specification or reaches minimum value.
So that parameter adjustment unit 220 first adjusts the operation of impedance parameter N as an example, it is assumed that the impedance inside PCI-E devices 21
It is minimum setting values of impedance parameter N and n_max is impedance that parameter N has multiple setting value n_min~n_max, wherein n_min
Parameter N maximum setting value；And the amplitude parameter K inside PCI-E devices 21 has multiple setting value k_min~k_max, its
Middle k_min is the minimum setting values of amplitude parameter K, and k_max is then the maximum setting values of amplitude parameter K, in order to be quickly found out
Effective parameter setting, (n_min+n_max)/2 can be set to when at the beginning by the initial value of impedance parameter N, but
This is not intended as a restrictive condition of the invention only as an example purposes of discussion.P (n, k) represent impedance parameter N=n with
In the case of amplitude parameter K=k, the size of the characteristic value P of the interference that power detecting unit 210 is detected；And in n representatives
Setting value of impedance parameter N, n+1 represents the setting value of this time impedance parameter N.When parameter adjustment unit 220 is to impedance
Parameter N is adjusted, if P (n, k)>P (n+1, k), and P (n+1, k)>If the upper limit of electromagnetic interference institute specification, adjustment resistance is represented
The direction of anti-parameter N is correct, and needs to proceed adjustment, therefore the adjustment of next time may proceed to maintain same direction to enter
Row (that is, impedance parameter N=n+2 is adjusted next time)；, whereas if P (n, k)<P (n+1, k), and P (n+1, k)>Electromagnetism is done
Disturb if the upper limit of institute's specification, then it is wrong to represent the direction of adjustment impedance parameter N, and need to proceed adjustment, therefore
Next time adjustment must change parameter adjustment direction (that is, by current parameter adjustment direction reversely, therefore next time adjustment hinder
Anti- parameter N=n).So it is repeated continuously, the characteristic value P of the interference signal detected until power detecting unit 210 is less than
The upper limit of electromagnetic interference institute specification or untill reaching minimum value.
Additionally, when parameter adjustment unit 220 has changed the direction of adjustment impedance parameter N twice, or N=n_min
Or during N=n_max, represent that impedance parameter N has been adjusted to optimum value in the case where the setting value of amplitude parameter K is for k
N', minimum value is reached with the characteristic value P of interference signal for power detecting unit 210 is detected, if however, now
If the upper limits of the characteristic value P still above electromagnetic interference institute specification, then parameter adjustment unit 220 stills need to continue to shaking
Width parameter K is adjusted.
The mode of amplitude parameter K adjustment is similar to impedance parameter N, similarly, in order to be quickly found out effective parameter setting,
The initial value of amplitude parameter K can be set to (k_min+k_max)/2 when at the beginning, it is assumed that k represents last amplitude
The setting value of parameter K, k+1 represents the setting value of this time amplitude parameter K, if P (n', k)>P (n', k+1), and P (n', k+
1)>If the upper limit of electromagnetic interference institute specification, it is correct to represent the direction of adjustment amplitude parameter K, and needs proceed
Adjustment, therefore the adjustment of next time may proceed to maintain the same direction carry out (that is, amplitude parameter K=k+2 is adjusted next time)；Conversely,
If P (n', k)<P (n', k+1), and P (n', k+1)>If the upper limit of electromagnetic interference institute specification, then adjustment amplitude parameter is represented
The direction of K is wrong, and needs to proceed adjustment, therefore the adjustment of next time must change the direction of parameter adjustment (also
I.e., by current parameter adjustment direction reversely, amplitude parameter K=k therefore is adjusted next time).So it is repeated continuously, until power
The characteristic value P of the interference signal that detecting unit 210 is detected is less than the upper limit of electromagnetic interference institute specification or reaches minimum value
Untill.When parameter adjustment unit 220 has changed the direction of adjustment amplitude parameter K twice, K=k_min or K=k_
During max, represent that amplitude parameter K also has been adjusted to optimum value k', interrogated with the interference for power detecting unit 210 is detected
Number characteristic value P less than electromagnetic interference institute specification the upper limit or reach minimum value.Note that in the present embodiment, in order to fast
Speed finds effective parameter setting, each amplitude parameter K is not combined with the setting of impedance parameter N and is all tested,
Setting combination it is therefore possible to find is not characteristic value P is reached the optimal setting combination of minimum value, and is only to make feature
A certain setting combinations of the value P less than the upper limit of electromagnetic interference institute specification.However, this is not intended as only as example purposes of discussion
A restrictive condition of the invention, similarly, in another embodiment, can be when at the beginning by the initial of amplitude parameter K
Value is set to (k_min+k_max)/2, enters the adjustment of line parameter, it is assumed that k represents the setting value of last amplitude parameter K, and n' represents k
Optimum impedance parameter, k+1 represents the setting value of this time amplitude parameter K, n " represent the optimum impedance parameter of k+1, if P
(n',k)>P (n ", k+1), and P (n ", k+1)>If the upper limit of electromagnetic interference institute specification, the direction of adjustment amplitude parameter K is represented
Be correct, and need to proceed adjustment, thus next time adjustment may proceed to maintain same direction carry out (that is, it is next
Secondary tune amplitude parameter K=k+2)；, whereas if P (n', k)<P (n ", k+1), and P (n', k+1)>Electromagnetic interference institute specification it is upper
If limit, then it is wrong to represent the direction of adjustment amplitude parameter K, and needs to proceed adjustment, thus next time adjustment
Must change parameter adjustment direction (that is, by current parameter adjustment direction reversely, therefore adjustment amplitude parameter K=next time
k).So it is repeated continuously, until the characteristic value P for disturbing signal that power detecting unit 210 is detected is less than electromagnetic interference
The upper limit of institute's specification or untill reaching minimum value.Adjust twice amplitude parameter K's when parameter adjustment unit 220 is changed
Direction, during K=k_min or K=k_max, represents that amplitude parameter K also has been adjusted to optimum value k', to cause power
The characteristic value P of the interference signal that detecting unit 210 is detected reaches minimum value.It should be noted that with the tune of parameter K
Whole, parameter N can also change therewith, but the present invention is not limited thereto, when parameter N need not change, it is also possible to only change ginseng
Number K.
Note that above-mentioned only as example purposes of discussion, be not intended as a restrictive condition of the invention, people in the art
Member can also change the order of impedance parameter N and amplitude parameter K adjustment, can equally reach the resistance found out needed for reducing interference signal
The appropriate setting value of anti-parameter N and amplitude parameter K, this design variation is also under the jurisdiction of scope of the invention.
Fig. 4 is refer to, Fig. 4 is the flow chart of an embodiment of the control method that the present invention is applied to PCI-E devices.If
Substantially the same result can be obtained, then these steps are not necessarily to be performed in accordance with the execution order shown in Fig. 4.The present invention
Passage choosing method can briefly be summarized as the following steps：
Step 400：Start.
Step 402：Detect the spectrum intensity value on an output spectrum of a radio communications transmitter.
Step 404：At least one control signal is produced according to the spectrum intensity value.
Step 405：The ginseng of a quick peripheral assembly interconnecting device is adaptively adjusted according at least one control signal
Number.
Step 406：Terminate.
Due to those skilled in the art when can in read above in relation to PCI-E devices 21 control circuit 200 paragraph after
The details of operation of each step in Fig. 4 is will readily appreciate that, for brevity, is just repeated no more in this.
In sum, the present invention can provide a kind of control of the radio communication interference that can reduce caused by PCI-E devices
Circuit processed and control method, but it is able to maintain that the transmission quality of PCI-E devices again simultaneously.
Claims (20)
1. a kind of control circuit of quick peripheral assembly interconnecting device, it is characterised in that include：
One power detecting unit, is coupled to a radio communications transmitter, for detecting an output frequency of the radio communications transmitter
An interference signal in spectrum, and the interference signal that will be detected is converted to a characteristic value；And
One parameter adjustment unit, is coupled to the power detecting unit, for producing at least one control signal according to this feature value,
And the parameter of the quick peripheral assembly interconnecting device is adaptively adjusted according at least one control signal.
2. control circuit according to claim 1, wherein, the power detecting unit includes：
One frequency mixer, for this that to be detected interference signal in the output spectrum is carried out into frequency reducing；And
One power detector, is coupled to the frequency mixer, for detecting the interference signal after frequency reducing to produce this feature value.
3. control circuit according to claim 2, wherein, the frequency mixer is also used for receiving a local oscillations signal, passes through
The local oscillations signal and the output signal of the radio communications transmitter are mixed, the interference signal is carried out into frequency reducing；
The frequency of the wherein local oscillations signal is substantially equal to the frequency of the interference signal.
4. control circuit according to claim 2, wherein, the power detector includes：One variable gain amplifier and one
Simulate to digital signal converter；Wherein the variable gain amplifier is used for the gain according to adaptability adjustment by after frequency reducing
The interference signal change to a signal strength in the range of the simulation to the accessible signal strength of digital signal converter
Signal；The simulation is used for for the signal after conversion being converted to this feature value to digital signal converter.
5. control circuit according to claim 1, wherein, at least one control signal includes an impedance adjustment signal,
It is used to export the impedance adjustment signal to the quick peripheral assembly interconnecting device adjust the quick peripheral assembly interconnecting device
Impedance.
6. control circuit according to claim 5, wherein, the quick peripheral assembly interconnecting device includes an amplifier,
It has a variable load；And the impedance adjustment signal is used to adjust the variable load.
7. control circuit according to claim 1, wherein, at least one control signal includes amplitude adjustment signal,
It is used to export amplitude adjustment signal to the quick peripheral assembly interconnecting device adjust the quick peripheral assembly interconnecting device
Transmission signal amplitudes.
8. control circuit according to claim 7, wherein, the quick peripheral assembly interconnecting device includes an amplifier,
It has a variable bias current source；And amplitude adjustment signal is used to adjust the variable bias current source.
9. control circuit according to claim 7, wherein, the quick peripheral assembly interconnecting device include an amplifier with
And a reference voltage generator, the reference voltage generator provides one to be supplied voltage and gives the amplifier；And amplitude adjustment news
Number it is used to adjust the supply voltage.
10. control circuit according to claim 1, wherein, the parameter adjustment unit constantly adjusts the quick peripheral assembly
The parameter of interconnection means, until detecting this feature value less than a predetermined critical.
11. control circuits according to claim 1, wherein, the radio communications transmitter is a Wireless Fidelity transmitter.
12. control circuits according to claim 1, wherein, the transmission band of the radio communications transmitter be substantially equal to or
The frequency of the second harmonic comprising the quick peripheral assembly interconnecting device.
13. a kind of control methods of quick peripheral assembly interconnecting device, it is characterised in that include：
Detect the interference signal on an output spectrum of a radio communications transmitter, and the interference signal conversion that will be detected
It is a characteristic value；And,
At least one control signal is produced according to this feature value, and this is adaptively adjusted according at least one control signal
The parameter of quick peripheral assembly interconnecting device.
14. control methods according to claim 13, wherein detecting on an output spectrum of a radio communications transmitter
One interference signal includes：
This that to be detected interference signal in the output spectrum is carried out into frequency reducing；And
The interference signal after frequency reducing is detected to produce this feature value.
15. control methods according to claim 14, wherein this that to be detected interference signal in the output spectrum is carried out
Frequency reducing includes：A local oscillations signal is received, by by the output signal of the local oscillations signal and the radio communications transmitter
It is mixed, the interference signal is carried out into frequency reducing；The frequency of the wherein local oscillations signal is substantially equal to the interference signal
Frequency.
16. control methods according to claim 13, the wherein at least one control signal include an impedance adjustment signal,
To adjust the impedance of the quick peripheral assembly interconnecting device according to the impedance adjustment signal.
17. control methods according to claim 13, the wherein at least one control signal include amplitude adjustment signal,
The transmission signal amplitudes of the quick peripheral assembly interconnecting device are adjusted to adjust signal according to the amplitude.
18. control methods according to claim 13, wherein adaptively adjusting this according at least one control signal
The parameter of quick peripheral assembly interconnecting device includes：The parameter of the quick peripheral assembly interconnecting device is constantly adjusted, until detecting
A predetermined critical is less than to this feature value.
19. control methods according to claim 13, the wherein radio communications transmitter are a Wireless Fidelity transmitter.
20. control methods according to claim 13, the transmission band of the wherein radio communications transmitter be substantially equal to or
The frequency of the second harmonic comprising the quick peripheral assembly interconnecting device.
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| CN201310466116.XA CN104516279B (en) | 2013-09-30 | 2013-09-30 | The control circuit and control method of quick peripheral assembly interconnecting device |
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| CN201310466116.XA CN104516279B (en) | 2013-09-30 | 2013-09-30 | The control circuit and control method of quick peripheral assembly interconnecting device |
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