CN105432031A - Control circuit for equalizer, equalizer and optical receiver - Google Patents
Control circuit for equalizer, equalizer and optical receiver Download PDFInfo
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- CN105432031A CN105432031A CN201480013803.9A CN201480013803A CN105432031A CN 105432031 A CN105432031 A CN 105432031A CN 201480013803 A CN201480013803 A CN 201480013803A CN 105432031 A CN105432031 A CN 105432031A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/69—Electrical arrangements in the receiver
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Abstract
Disclosed are a control circuit for an equalizer, the equalizer and an optical receiver, which aim to solve the problems of the equalizers in the prior art such as poor flexibility, low accuracy and high dependency upon user experience. The control circuit comprises: a relative proportion acquisition circuit (102), a comparison circuit (103) and an equalization controller (104); the relative proportion acquisition circuit is used for acquiring and outputting an actual relative proportion; the input end (102a) of the relative proportion acquisition circuit is connected with an output end (101b) of the equalizer, and an output end (102b) is connected with a first input end (103b) of the comparison circuit. The comparison circuit (103) is used for comparing the actual relative proportion with a reference relative proportion and outputting the result of comparison therebetween; a second input end (103b) of the comparison circuit (103) is used for receiving the reference relative proportion, and an output end (103c) is connected with an input end (104a) of the equalization controller. The equalization controller (104) is used for outputting an equalization compensating factor so that the equalizer (101) performs frequency compensation on an input signal of the input end (101a) of the equalizer in accordance with the adjusted equalization compensating factor; and an output end (104b) of the equalization controller (104) is connected with a control end (101c) of the equalizer. The control circuit is applicable to the technical field of communications.
Description
The present invention relates to communication technical field, more particularly to a kind of balanced device control circuit,
Balanced device and photoreceiver.
Balanced device is a kind of electronic equipment being made up of devices such as resistance, electric capacity, inductance, is used
In carrying out frequency compensation according to isostatic compensation factor pair input signal, so as to improve input signal
Speed.At present, typically by manually adjust the isostatic compensation factor or by control voltage come
The size of resistance, electric capacity, inductance in adjustment balanced device etc., so as to adjust the frequency of balanced device
Rate response characteristic, so that the speed of the output signal of balanced device levels off to targeted rate.
Because the method for the frequency response characteristic of above-mentioned adjustment balanced device and the experience of user are tight
Close correlation；Therefore, the user lacked experience is typically difficult to make the defeated of balanced device in a short time
The speed for going out signal levels off to targeted rate, and very flexible, the accuracy of regulation are low.
The content of the invention
Embodiments of the invention provide a kind of control circuit, balanced device and the light-receiving of balanced device
Machine, to solve, the flexibility that balanced device is adjusted in the prior art is poor, accuracy is low, right
The problem of user experience relies on too high.
In order to solve the above technical problems, embodiments of the invention are adopted the following technical scheme that：
First aspect includes there is provided a kind of control circuit of balanced device, balanced device：Input,
Output end and control end；The control circuit includes：Relative scale acquisition circuit, comparison are electric
Road and balance controller；The relative scale obtains circuit and wrapped with the balance controller
Include：Input and output end；The comparison circuit includes：First input end, the second input
End and output end；
The input that the relative scale obtains circuit is connected with the output end of the balanced device；
The relative scale obtains the output end of circuit and the first input of the comparison circuit
End connection；
Second input of the comparison circuit, relative scale is referred to for receiving；
The output end of the comparison circuit is connected with the input of the balance controller；
The output end of the balance controller, for exporting the isostatic compensation factor；
The output end of the balance controller is connected with the control end of the balanced device；
The relative scale is obtained in circuit, the output signal for obtaining the balanced device
The actual relative scale of the power of high frequency signal components and the power of middle low frequency signal components, or
Obtain the power of high frequency signal components in the output signal of the balanced device and the output
The actual relative scale of the power of signal；
The comparison circuit, compares for comparing the actual relative scale with the reference
Example, obtains comparative result；
The balance controller, for adjusting the equal of the balanced device according to the comparative result
Weigh compensating factor, to cause the balanced device according to the isostatic compensation factor pair after the regulation
The input signal of the balanced device carries out frequency compensation.
With reference in a first aspect, in the first possible embodiment, the relative scale is obtained
Sense circuit includes：First wave filter, the second wave filter, the first power detector, the second work(
Rate detector and the first ratio circuit；First ratio circuit includes：First input end,
Second input and output end；
The input of first wave filter, second wave filter input respectively with institute
State the output end connection of balanced device；
The output end of first wave filter and the input of first power detector connect
Connect；
The output end of second wave filter and the input of second power detector connect
Connect；
The output end of first power detector and the first input end of the comparison circuit
Connection；The output end of second power detector and the second input of the comparison circuit
Connection；
The output end of first ratio circuit is connected with the input of the balance controller；
First wave filter, is filtered for the output signal to the balanced device, obtains
To high frequency signal components；
Second wave filter, is filtered for the output signal to the balanced device, obtains
To middle low frequency signal components；
First power detector, the power for detecting the high frequency signal components；
Second power detector, the power for detecting the low frequency signal components；
First ratio circuit, for obtaining the power of the high frequency signal components with respect to institute
The actual relative scale of the power of middle low frequency signal components is stated, or obtains the middle low frequency signal
The actual relative scale of the power of the relatively described high frequency signal components of the power of composition.
With reference to the first possible embodiment of first aspect, in second of possible implementation
In mode, first ratio circuit, the power phase for obtaining the high frequency signal components
To the actual relative scale of the power of the middle low frequency signal components；The Balance route utensil
Body is used for：
When the comparative result is that the actual relative scale is more than with reference to relative scale, subtract
The isostatic compensation factor of the small balanced device；Or,
When the comparative result is that the actual relative scale is less than with reference to relative scale, increase
The isostatic compensation factor of the big balanced device.
With reference to the first possible embodiment of first aspect, in the third possible implementation
In mode, first ratio circuit, the power phase for obtaining the high frequency signal components
To the actual relative scale of the power of the middle low frequency signal components；The Balance route utensil
Body is used for：
When the comparative result is more than the maximum of pre-set interval, reduce the Balance route
The isostatic compensation factor of device output；Or,
When the comparative result is less than the minimum value of pre-set interval, increase the Balance route
The isostatic compensation factor of device output.
With reference to the first possible embodiment of first aspect, in the 4th kind of possible implementation
In mode, first wave filter and/or second wave filter are bandpass filter.
With reference in a first aspect, in the 5th kind of possible embodiment, the relative scale is obtained
Sense circuit includes：3rd wave filter, the 3rd power detector, the 4th power detector and
Two ratio circuits；The ratio circuit includes：First input end, the second input and output
End；
The input of 3rd wave filter, the input difference of the 4th power detector
It is connected with the output end of the balanced device；
The output end of 3rd wave filter connects with the input of the 3rd power detector
Connect；
The output end of 3rd power detector and the first input end of the comparison circuit
Connection；The output end of 4th power detector and the second input of the comparison circuit
Connection；
The output end of second ratio circuit is connected with the input of the balance controller；
3rd wave filter, is filtered for the output signal to the balanced device, obtains
To high frequency signal components；
3rd power detector, the power for detecting the high frequency signal components；
4th power detector, the work(of the output signal for detecting the balanced device
Rate；
Second ratio circuit, for obtaining the power of the high frequency signal components with respect to institute
The actual relative scale of the power of output signal is stated, or obtains the power phase of the output signal
To the actual relative scale of the power of the high frequency signal components.
With reference to first aspect, first aspect the first possible embodiment to the 5th kind can
The embodiment of energy is any, in the 6th kind of possible embodiment, the comparison circuit
Realized by digital circuit or analog circuit；And/or, the balance controller passes through numeral
Circuit or analog circuit are realized.
Second aspect there is provided a kind of balanced device, including：Input, output end and control end；
The input, for receiving input signal；
The output end, for output signal；
The control end, the isostatic compensation after regulation for receiving control circuit output because
Son；It is described to control the first possible implementation that circuit is above-mentioned first aspect, first aspect
Mode to any described balanced device of the 6th kind of possible embodiment control circuit.
The third aspect there is provided a kind of photoreceiver, including：Optical Receivers ROSA,
The control circuit of weighing apparatus, the control balanced device, and limiting amplifier LA；Wherein,
Control the balanced device controls circuit to be above-mentioned first aspect, the first of first aspect
Possible embodiment is planted to any described balanced device of the 6th kind of possible embodiment
Control circuit；
The input of the balanced device, the output signal for receiving the ROSA；
The output end of the balanced device is connected with the input of the LA.
In above-mentioned technical proposal, mended because control circuit can automatically adjust the balanced of balanced device
Repay the factor so that the speed of the output signal of balanced device levels off to targeted rate.With existing skill
Compared in art, improve flexibility and the accuracy of balanced device, and then cause balanced device to defeated
Enter the isostatic compensation effect that signal is optimal.
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, under
Face will be briefly described to the required accompanying drawing used in embodiment or description of the prior art,
It should be evident that drawings in the following description are only some embodiments of the present invention, for
, on the premise of not paying creative work, can be with for those of ordinary skill in the art
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of schematic diagram of the control circuit of balanced device provided in an embodiment of the present invention；
Fig. 2 is the signal of the control circuit of another balanced device provided in an embodiment of the present invention
Figure；
Fig. 3 is the signal of the control circuit of another balanced device provided in an embodiment of the present invention
Figure；
Fig. 4 is a kind of method stream of the control circuit of balanced device provided in an embodiment of the present invention
Cheng Tu；
Fig. 5 is the method for the control circuit of another balanced device provided in an embodiment of the present invention
Flow chart；
Fig. 6 is a kind of structural representation of balanced device provided in an embodiment of the present invention；
Fig. 7 is a kind of structural representation of photoreceiver provided in an embodiment of the present invention；
Fig. 8 is the AFE(analog front end) of existing 10G photoreceivers provided in an embodiment of the present invention
Frequency response curve schematic diagram；
Fig. 9 is a kind of frequency of the AFE(analog front end) of photoreceiver provided in an embodiment of the present invention
Response curve schematic diagram.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, to the technology in the embodiment of the present invention
Scheme is clearly and completely described, it is clear that described embodiment is only the present invention
A part of embodiment, rather than whole embodiments.Based on the embodiment in the present invention, sheet
Field those of ordinary skill obtained under the premise of creative work is not made it is all its
His embodiment, belongs to the scope of protection of the invention.
The terms "and/or", only it is a kind of describe affiliated partner incidence relation,
Expression may have three kinds of relations, for example, A and/or B, can be represented：Individualism A,
There is A and B, these three situations of individualism B simultaneously.Character "/" herein, typically
Represent that forward-backward correlation object is a kind of relation of "or".In addition, term herein is " more
It is individual " refer to two or more.
As shown in figure 1, being a kind of control circuit of balanced device provided in an embodiment of the present invention
Schematic diagram, to realize the control to balanced device 101, the control circuit can include：Phase
Comparative example obtains circuit 102, comparison circuit 103 and balance controller 104.
Balanced device 101 includes：Input 101a, output end 101b and control end 101c；
Relative scale, which obtains circuit 102, to be included：Input 102a and output end 102b；Compare electric
Road 103 includes：First input end 103a, the second input 103b and output end 103c；
Balance controller 104 includes：Input 104a and output end 104b.
The input 102a that the output end 101b of balanced device obtains circuit with relative scale connects
Connect；Relative scale obtains the first input end 103a of circuit output end 102b and comparison circuit
Connection；Second input 103b of comparison circuit refers to relative scale for reception；Compare
The output end 103c and balance controller of device input 104a connections；Balance controller
Output end 104b, for exporting the isostatic compensation factor；The output end 104b of balance controller
It is connected with the control end 101c of balanced device.
Balanced device 101, for signal (the i.e. balanced device 101 received to input 101a
Input signal) carry out frequency compensation, obtain output signal；Exported through output end 101b
The output signal.
Exemplary, balanced device 101 can be：The basis of balanced device in the prior art
The electronic component formed after one control end 101c of upper increase, the embodiment of the present invention has to it
Body realizes circuit without restriction；Wherein, control end 101c is used to receive balance controller
The isostatic compensation factor of 104 outputs.The input signal and output signal of balanced device 101 be
Analog electrical signal." balanced device 101 carries out frequency compensation to its input signal, is exported
Signal " is specifically as follows：Balanced device 101 produces gain compensation peak according to the isostatic compensation factor,
And frequency compensation is carried out to its input signal using the gain compensation peak so that balanced device 101
The speed of output signal level off to targeted rate；Wherein, " the isostatic compensation factor " here
Can be the isostatic compensation factor pre-set, or the control end 101c of balanced device
The isostatic compensation factor exported by balance controller 104 received.
Relative scale is obtained in circuit 102, the output signal for obtaining balanced device 101
The actual relative scale of the power of high frequency signal components and the power of middle low frequency signal components, or
The power and the output for obtaining the high frequency signal components in the output signal of balanced device 101 are believed
Number power actual relative scale.
Exemplary, " power of high frequency signal components and the power of middle low frequency signal components
Actual relative scale " can be：The relatively middle low frequency signal components of the power of high frequency signal components
Power actual relative scale, i.e.,(it is expressed as：Situation 1)；Or middle low frequency signal
The actual relative scale of the power of the power relative high frequency signals composition of composition, i.e.,(table
It is shown as：Situation 2)." the reality of the power of high frequency signal components and the power of the output signal
Relative scale " can be：Power of the power of high frequency signal components with respect to the output signal
Actual relative scale, i.e.,(it is expressed as：Situation 3)；Or the power of the output signal
The actual relative scale of the power of relative high frequency signals composition, i.e.,(it is expressed as：Situation 4).
High frequency signal components and middle low frequency signal components in the output signal of balanced device 101
Division it is relevant with the speed of the output signal.For example, when the speed of the output signal is
During 10G bits, its corresponding target transmission bandwidth is general in 7.5GHz (hertz) left and right；
In this case, bandwidth shared by middle low frequency signal components can for hundreds of MHz to it is several (such as
2~any value (being labeled as F1) 4) in GHz；Bandwidth shared by high frequency signal components can
Think that any values of several (such as 4~5) GHz into higher (such as 6~8) GHz (is labeled as
F2).It is, of course, also possible to divided by other means, the embodiment of the present invention to this not
It is defined.
Comparison circuit 103, compares for comparing the actual relative scale with the reference
Example, obtains comparative result.
Exemplary, " referring to relative scale " is used for the output signal for characterizing balanced device 101
The target relative scale of the power of high frequency signal composition and the power of middle low frequency signal components,
Or the power of the output signal high frequency signal composition of balanced device 101 and the output signal
The target relative scale of power.Specifically, as the first input end 103a of comparison circuit 103
" the actual relative scale " received is the relatively middle low frequency signal of power of high frequency signal components
During actual relative scale (the i.e. above-mentioned situation 1) of the power of composition, the second input 103b
" the referring to relative scale " received is the relatively middle low frequency signal of power of high frequency signal components
The target relative scale of the power of composition；Other several situations (i.e. above-mentioned situation 2,3,4)
Under, " actual relative scale " and the corresponding relation of " referring to relative scale " are similar,
It will not enumerate herein.
" referring to relative scale " can obtain in the following manner：Balanced device 101 is set
The isostatic compensation factor, with cause balanced device 101 its input signal is not entered line frequency mend
Repay；There is the signal of targeted rate, profit to the input 101a inputs one of balanced device 101
The balanced device 101 is controlled with above-mentioned control circuit；Relative scale is obtained into circuit
The 102 actual relative scales obtained are as referring to relative scale.Wherein, the acquisition modes can
To be performed in above-mentioned control circuit power-up initializing.In addition, " referring to relative scale " is also
It can be the value pre-set.
Comparison circuit 103 can pass through analog circuit or digital circuit.Specifically：
When comparison circuit 103 is realized by analog circuit, its output end 103c is according to pre-
If magnitude of voltage exports different magnitudes of voltage.Specifically, received as first input end 103a
It is defeated when the value of voltage/current is more than the value for the voltage/current that the second input 103b is received
Go out to hold 103c outputs more than a magnitude of voltage of preset voltage value；When first input end 103a connects
When the value of the voltage/current of receipts is less than the value for the voltage/current that the second input 103b is received,
A magnitude of voltage of the output end 103c outputs less than preset voltage value；As first input end 103a
The value of the voltage/current of reception is equal to the value for the voltage/current that the second input 103b is received
When, output end 103c output preset voltage values.And the voltage that first input end 103a is received
Difference between the value for the voltage/current that the value of/electric current and the second input 103b are received is got over
Greatly, the difference between the magnitude of voltage and preset voltage value of output end 103c outputs is bigger.
Exemplary, when comparison circuit 103 is realized by analog circuit, the comparison circuit
103 can be comparator.Comparator is the curtage by comparing two inputs
Size, the electronic component of different voltage results is exported in output end.It should be noted that working as
When comparison circuit 103 is comparator, the first input end 103a of comparison circuit is comparator
Normal phase input end, the second input 103b of comparison circuit is the reverse input of comparator
End, the output end 103c of comparison circuit is the output end of comparator.In addition, comparison circuit
103 can also be realized by other combinations of the devices such as various resistance, electric capacity, inductance,
The present invention is without limitation.
When comparison circuit 103 is by digital circuit, at least two binary systems can be used
Numeral represents the comparative result of its output end 103c outputs；For example, " 11 " table can be used
Show that actual relative scale is more than and refer to relative scale, represent that actual relative scale is small with " 00 "
In referring to relative scale, with " 10 or 01 " represents that actual relative scale is equal to reference to relative
Ratio.It is of course also possible to a magnitude of voltage is represented with the binary digit of three or more than three,
The magnitude of voltage and the magnitudes of voltage exported of output end 103c in above-mentioned analog circuit implementation method
Function is similar.
Balance controller 104, for adjusting the equal of balanced device 101 according to the comparative result
Weigh compensating factor, to cause balanced device 101 balanced according to the isostatic compensation factor pair after regulation
The input signal of device 101 carries out frequency compensation.
Exemplary, balance controller 104 can be real by analog circuit or digital circuit
It is existing.When implementing, circuit 102 and comparison circuit 103 can be obtained in relative scale
Between, between comparison circuit 103 and balance controller 104, or balance controller 104
Digital analog converter or analog converter are set between balanced device 101, to realize analog signal
Conversion between data signal.For example, when comparison circuit 103 is realized by analog circuit,
And balance controller 104 by digital circuit when, can comparison circuit 103 with
One analog-digital converter is set between weighing apparatus controller 104, and in balance controller 104 and
One digital analog converter is set between weighing apparatus 101.
Optionally, balance controller 104 is specifically for performing following any action：
1) " the actual relative scale " that the first input end 103a of comparison circuit 103 is received
For above-mentioned situation 1 or situation 3：
" if comparative result " is more than with reference to relative scale for actual relative scale, reduce
The isostatic compensation factor of output；If or, " comparative result " is that actual relative scale is less than ginseng
When examining relative scale, then increase the isostatic compensation factor of output.
2) " the actual relative scale " that the first input end 103a of comparison circuit 103 is received
For above-mentioned situation 2 or situation 4：
" if comparative result " is more than with reference to relative scale for actual relative scale, increase
The isostatic compensation factor of output；If or, " comparative result " is that actual relative scale is less than ginseng
When examining relative scale, then reduce the isostatic compensation factor of output.
It should be noted that " the reality that the first input end 103a of comparison circuit 103 is received
When border relative scale " is above-mentioned situation 1,2,3,4 either case, if " comparative result "
It is equal to for actual relative scale and refers to relative scale, explanation：Isostatic compensation factor energy now
The speed of the output signal of balanced device 101 is enough set to meet targeted rate, then balance controller
104 do not adjust the isostatic compensation factor of balanced device 101, and always with the isostatic compensation factor
Balanced device 101 is controlled to carry out frequency compensation to the input signal of balanced device 101.
It is, moreover, an optional that balance controller 104 is specifically for performing following any action：
1) " the actual relative scale " that the first input end 103a of comparison circuit 103 is received
For above-mentioned situation 1 or situation 3：
" if comparative result " is more than the maximum of pre-set interval, reduce balance controller
The isostatic compensation factor of output；If or, " comparative result " is less than the minimum value of pre-set interval
When, then increase the isostatic compensation factor of balance controller output.
2) " the actual relative scale " that the first input end 103a of comparison circuit 103 is received
For above-mentioned situation 2 or situation 4：
" if comparative result " is more than the maximum of pre-set interval, increase balance controller
The isostatic compensation factor of output；If or, " comparative result " is less than the minimum value of pre-set interval
When, then reduce the isostatic compensation factor of balance controller output.
It should be noted that " the reality that the first input end 103a of comparison circuit 103 is received
When border relative scale " is above-mentioned situation 1,2,3,4 either case, if " comparative result "
Within pre-set interval, explanation：The isostatic compensation factor now can make balanced device 101
The speed of output signal meet targeted rate, then balance controller 104 does not adjust balanced device
The 101 isostatic compensation factor, and 101 pairs of balanced device is controlled with the isostatic compensation factor always
The input signal of balanced device 101 carries out frequency compensation.
Exemplary, " pre-set interval " here can be according to the output signal of balanced device
Allowable error between speed and targeted rate is determined.It should be noted that above-mentioned
Under the either case of situation 1,2,3,4, the actual value of the pre-set interval is different.
When implementing, balance controller 104 can progressively be adjusted in the way of stepping
Weigh compensating factor.Specifically, increasing or reducing a fixation by current equalization compensating factor every time
Interval, and balanced device 101 is controlled according to the isostatic compensation factor after the regulation, circulate according to this,
Until the comparative result that comparison circuit 103 is exported is equal to reference to relative for actual relative scale
When ratio or comparative result are in pre-set interval, the isostatic compensation factor is no longer adjusted.Wherein,
The embodiment of the present invention is to the specific value of the fixed intervals without limiting.
As shown in Fig. 2 in a kind of implementation of the embodiment of the present invention, relative scale is obtained
Sense circuit 102 can include：First wave filter 1021, the second wave filter 1022, first
Power detector 1023, the second power detector 1024 and the first ratio circuit 1025.
First wave filter 1021 includes：Input 1021a and output end 1021b；Second
Wave filter 1022 includes：Input 1022a and output end 1022b；First power detection
Device 1023 includes：Input 1023a and output end 1023b；Second power detector 1024
Including：Input 1024a and output end 1024b；First ratio circuit 1025 includes：
First input end 1025a, the second input 1025b and output end 1025c.
The input 1021a of first wave filter and the input 1022a of the second wave filter distinguish
It is connected with the output end 101b of balanced device；The output end 1021b of first wave filter and first
The input 1023a connections of power detector；The output end 1022b of second wave filter and
The input 1024a connections of two power detectors；The output end of first power detector
1023b is connected with the first input end 1025a of the first ratio circuit；Second power detector
Output end 1024b be connected with the second input 1025b of the first ratio circuit；First ratio
It is worth the output end 1025c and comparison circuit of circuit first input end 103a connections.
First wave filter 1021, is filtered for the output signal to balanced device 101,
Obtain high frequency signal components.
Second wave filter 1022, is filtered for the output signal to balanced device 101,
Obtain middle low frequency signal components.
First power detector 1023, the power for detecting high frequency signal components.
Second power detector 1024, the power for detecting low frequency signal components.
First ratio circuit 1025, for obtaining the power of high frequency signal components relatively in it is low
The power of low frequency signal components in the actual relative scale of the power of frequency signal component, or acquisition
The actual relative scale of the power of relatively described high frequency signal components.
Exemplary, the embodiment of the present invention is to the first wave filter 1021 and the second wave filter
1022 type and implement circuit without restriction.For example, the first wave filter 1021
Type can be for high-pass filter, bandpass filter or bandstop filter etc.；Second filtering
The type of device 1022 can be low pass filter, bandpass filter or bandstop filter etc..
, can be according to the bandwidth shared by high frequency signal components and middle low frequency signal components when implementing
The parameter of the first wave filter 1021 and the second wave filter 1022 is adjusted, to cause the first filtering
Device 1021 exports high frequency signal components, low frequency signal components in the output of the second wave filter 1022.
Power detector (including the first power detector 1023, the second power detector
1024) it is that the power for being inputted signal is converted into voltage signal or current signal, and exports
The electronic component of specific magnitude of voltage or current value.The embodiment of the present invention is to power detector
Circuit is implemented without restriction.
First ratio circuit 1025 can pass through analog circuit or digital circuit.Wherein,
First ratio circuit 1025 be able to can also be integrated in comparison circuit 103 with individualism.
It should be noted that in this implementation, the input 1021a of the first wave filter
Input 1022a with the second wave filter is the input that relative scale obtains circuit
102a；The output end 1025c of first ratio circuit is the output that relative scale obtains circuit
Hold 102b.
As shown in figure 3, in another implementation of the embodiment of the present invention, relative scale
Obtaining circuit 102 can include：3rd wave filter 1026, the 3rd power detector 1027,
4th power detector 1028 and the second ratio circuit 1029.
3rd wave filter 1026 includes：Input 1026a and output end 1026b；3rd
Power detector 1027 includes：Input 1027a and output end 1027b；4th power
Detector 1028 includes：Input 1028a and output end 1028b；Second ratio circuit
1029 include：First input end 1029a, the second input 1029b and output end 1029c.
The input 1026a of the 3rd wave filter and input 1028a of the 4th power detector
It is connected respectively with the output end 101b of balanced device；The output end 1026b of 3rd wave filter with
The input 1027a connections of 3rd power detector；The output end of 3rd power detector
1027b is connected with the first input end 1029a of the second ratio circuit；4th power detector
Output end 1028b be connected with the second input 1029b of the second ratio circuit；Second ratio
It is worth the output end 1029c and comparison circuit of circuit first input end 103a connections.
3rd wave filter 1026, is filtered for the output signal to balanced device 101,
Obtain high frequency signal components.
3rd power detector 1027, the power for detecting high frequency signal components.
4th power detector 1028, the work(of the output signal for detecting balanced device 101
Rate.
Second ratio circuit 1029, the relative output of power for obtaining high frequency signal components
The actual relative scale of the power of signal, or obtain the power relative high frequency signals of output signal
The actual relative scale of the power of composition.
Exemplary, the relevant explanation of the 3rd wave filter 1026 may be referred to above-mentioned to first
The explanation of wave filter 1021.3rd power detector 1027, the 4th power detector 1028
Relevant explanation may be referred to the above-mentioned explanation to power detector.
Second ratio circuit can pass through analog circuit or digital circuit.Wherein, second
Ratio circuit 1029 be able to can also be integrated in comparison circuit 103 with individualism.
It should be noted that in this implementation, the input 1026a of the 3rd wave filter
Input 1028a with the 4th power detector is the input that relative scale obtains circuit
Hold 102a；The output end 1029c of second ratio circuit is that relative scale obtains circuit
Output end 102b.
The embodiments of the invention provide a kind of control circuit of balanced device, because control circuit can
To automatically adjust the isostatic compensation factor of balanced device so that the speed of the output signal of balanced device
Level off to targeted rate.Compared with the prior art, flexibility and the essence of balanced device are improved
Exactness, and then the isostatic compensation effect that balanced device is optimal to input signal.
The control method that balanced device is controlled based on above-mentioned control circuit is illustrated below.
Embodiment 1
The present embodiment provides a kind of control method of the control circuit of balanced device based on Fig. 2.
Above-mentioned " actual relative scale " is in the present embodiment：The power of high frequency signal components is relative
The actual relative scale (i.e. above-mentioned situation 1) of the power of middle low frequency signal components；Above-mentioned " ginseng
Examine relative scale " be in the present embodiment：The relatively middle low frequency letter of the power of high frequency signal components
The target relative scale of the power of number composition；Above-mentioned " the first wave filter " in the present embodiment
For：First bandpass filter；Above-mentioned " the second wave filter " is in the present embodiment：Second
Bandpass filter.
As shown in figure 4, a kind of control method of the balanced device provided for the present embodiment, including：
401st, balanced device carries out frequency compensation according to isostatic compensation factor pair input signal, and
Signal after output frequency compensation.
Exemplary, the isostatic compensation factor can be the isostatic compensation factor pre-set
Or the balanced benefit exported by balance controller that balanced device is received in previous circulation process
Repay the factor.
402nd, the first bandpass filter is filtered to the output signal, obtains high-frequency signal
Composition.
403rd, the first power detector carries out power detection to the high frequency signal components, obtains
The power of high frequency signal components.
404th, the second bandpass filter is filtered to the output signal, obtains middle low frequency letter
Number composition.
405th, the second power detector carries out power detection to low frequency signal components in this, obtains
To the power of middle low frequency signal components.
Wherein, step 402-403 and step 404-405 execution sequence can in no particular order,
The embodiment of the present invention is not limited this.
406th, the first ratio circuit obtains the relatively middle low frequency signal of power of high frequency signal components
The actual relative scale of the power of composition.
407th, comparison circuit seeks poor fortune to the actual relative scale with being carried out with reference to relative scale
Calculate, obtain difference.
408th, whether balance controller judges the difference in pre-set interval.
If so, explanation：The isostatic compensation factor can expire the speed of the output signal of balanced device
Foot-eye speed, i.e. balance controller need not adjust the isostatic compensation factor, then perform step
412；If it is not, then performing step 409.
409th, balance controller judges whether the difference is more than the maximum of pre-set interval.
If so, then performing step 410；If it is not, then performing step 411.
Optionally, step 409 can be replaced with following steps：Balance controller judges the difference
Whether value is less than the minimum value of pre-set interval.If so, then performing step 411；If it is not, then
Perform step 410.
410th, balance controller reduces the isostatic compensation factor.
Perform after step 410, perform step 412.
411st, the balance controller increase isostatic compensation factor.
412nd, balance controller exports the isostatic compensation factor after regulation to balanced device, so that
Balanced device enters line frequency according to isostatic compensation factor pair its input signal after the regulation and mended
Repay.
Perform after step 412, perform step 401.
It should be noted that performing the equilibrium obtained after above-mentioned steps 410 or step 411
Compensating factor, the isostatic compensation factor after as adjusting.
The control method for the balanced device that the present embodiment is provided can automatically adjust the equal of balanced device
Weigh compensating factor so that the speed of the output signal of balanced device levels off to targeted rate.With showing
Have in technology and compare, improve flexibility and the accuracy of balanced device, and then cause balanced device
The isostatic compensation effect being optimal to input signal.
Embodiment 2
The present embodiment provides a kind of control method of the control circuit of balanced device based on Fig. 3.
Above-mentioned " actual relative scale " is in the present embodiment：The power of high frequency signal components is relative
The actual relative scale (i.e. above-mentioned situation 3) of the power of output signal；It is above-mentioned " to refer to phase
Comparative example " is in the present embodiment：The work(of the power relative output signal of high frequency signal components
The target relative scale of rate；Above-mentioned " the 3rd wave filter " is in the present embodiment：3rd band
Bandpass filter.
As shown in figure 5, a kind of control method of the balanced device provided for the present embodiment, including：
501st, balanced device carries out frequency compensation according to isostatic compensation factor pair input signal, and
Signal after output frequency compensation.
It is exemplary, the isostatic compensation factor be the isostatic compensation factor that pre-sets or
The isostatic compensation exported by balance controller that balanced device is received in previous circulation process
The factor.
502nd, the 3rd bandpass filter is filtered operation to the output signal, obtains high frequency
Signal component.
503rd, the 3rd power detector carries out power detection to the high frequency signal components, obtains
The power of high frequency signal components.
504th, the 4th power detector carries out power detection to the output signal, obtains signal
Power.
Wherein, step 502-503 can in no particular order with the execution sequence of step 504, this
Inventive embodiments are not limited this.
505th, the second ratio circuit obtains the power relative output signal of high frequency signal components
The actual relative scale of power.
506th, comparison circuit seeks poor fortune to the actual relative scale with being carried out with reference to relative scale
Calculate, obtain difference.
507th, whether balance controller judges the difference in pre-set interval.
If so, explanation：The isostatic compensation factor can expire the speed of the output signal of balanced device
Foot-eye speed, i.e. balance controller need not adjust the isostatic compensation factor, then perform step
511；If it is not, then performing step 508.
508th, balance controller judges whether the difference is more than the maximum of pre-set interval.
If so, then performing step 509；If it is not, then performing step 510.
Optionally, step 508 can also be replaced with following steps：Balance controller judges should
Whether difference is less than the minimum value of pre-set interval.
If so, then performing step 510；If it is not, then performing step 509.
509th, balance controller reduces the isostatic compensation factor.
Perform after step 509, perform step 511.
510th, the balance controller increase isostatic compensation factor.
511st, balance controller exports the isostatic compensation factor after regulation to balanced device, so that
Balanced device enters line frequency according to isostatic compensation factor pair its input signal after the regulation and mended
Repay.
Perform after step 511, perform step 501.
It should be noted that performing the equilibrium obtained after above-mentioned steps 509 or step 510
Compensating factor, the isostatic compensation factor after as adjusting.
The control method for the balanced device that the present embodiment is provided can automatically adjust the equal of balanced device
Weigh compensating factor so that the speed of the real output signal of balanced device levels off to targeted rate.
Compared with the prior art, flexibility and the accuracy of balanced device are improved, and then cause equal
The isostatic compensation effect that weighing apparatus is optimal to input signal.
The embodiment of the present invention additionally provides a kind of balanced device, as shown in fig. 6, the balanced device bag
Include：Input 601, output end 602 and control end 603.
Input 601, for receiving input signal.
Output end 602, for output signal；Wherein, the output signal be balanced device according to
Signal after isostatic compensation factor isostatic compensation.
Control end 603, the isostatic compensation after regulation for receiving control circuit output because
Son.
Wherein, the control circuit that circuit is any balanced device in above-described embodiment is controlled.
Optionally, the balanced device can also include the devices such as various resistance, electric capacity, inductance,
The present invention is not limited to this connected mode between each device.
Balanced device provided in an embodiment of the present invention includes：Input, output end and control end,
Because balanced device adds control end, the isostatic compensation that control circuit is automatically adjusted can be received
The factor, therefore balanced device can enter line frequency benefit according to the isostatic compensation factor pair input signal
Repay so that the speed of the output signal of balanced device levels off to targeted rate.With in the prior art
Compare, improve flexibility and the accuracy of balanced device, and then balanced device is believed input
Number isostatic compensation effect being optimal.
The control circuit and balanced device of the balanced device provided based on above-described embodiment, the present invention are real
Apply example and additionally provide a kind of photoreceiver, as shown in fig. 7, the photoreceiver includes light-receiving
Module (Receiver Optical Subassembly, abbreviation ROSA) 701, balanced device 702,
Control balanced device control circuit 703 and limiting amplifier (Limiting Amplifier,
Abbreviation LA) 704；Wherein, ROSA701, balanced device 702, the control for controlling balanced device
Circuit 703, LA704 may be collectively referred to as photoreceiver AFE(analog front end).
ROSA701 includes：Input, output end；Balanced device 702 includes：Input,
Output end, control end；The control circuit 703 of control balanced device includes：Input and output
End；LA704 includes：Input and output end.
ROSA701 output end is connected with the input of balanced device 702；Balanced device 702
Output end input and LA704 respectively with the control circuit 703 of control balanced device
Input is connected；The control end of balanced device 702 and the control circuit 703 of control balanced device
Output end connection.
ROSA701, for the optical signal of reception to be converted into electric signal.Exemplary,
ROSA701 can be by avalanche photodide (Avalanche Photodiode, abbreviation
APD) constituted with trans-impedance amplifier (Trans-impedance Amplifier, abbreviation TIA).
Balanced device 702, for producing gain compensation peak according to the isostatic compensation factor, to input
Signal carries out frequency compensation, obtains output signal.
Control balanced device control circuit 703, for export regulation after isostatic compensation because
Son；Wherein, the control circuit (hereinafter referred to as " control circuit ") 703 of balanced device is controlled
It can be the control circuit of any balanced device in above-described embodiment.
Limiting amplifier LA704, for the amplitude output signal of balanced device 702 to be amplified simultaneously
Limit within the specific limits, during alloing photoreceiver digital back-end to carry out the signal
Clock data recovery.
Because balanced device 702 has control end, the tune that control circuit 703 is exported can be received
The isostatic compensation factor after section；Therefore balanced device 702 can be according to the isostatic compensation factor pair
The input signal of balanced device 702 carries out frequency compensation so that the output signal of balanced device 702
Speed level off to targeted rate, so as to improve the speed of ROSA701 output signal,
Improve ROSA701 bandwidth.That is, it is possible to use the ROSA of low bandwidth,
The combination of balanced device and control circuit improves the ROSA in low broadband bandwidth, reaches or approaches
The ROSA of high bandwidth bandwidth.
Below using using transmission rate as 2.5G bits ROSA (abbreviation 2.5G ROSA),
Balanced device and control the combination of circuit reach or close to transmission rate be 10G bits
Exemplified by ROSA (abbreviation 10G ROSA) bandwidth, come illustrate using low bandwidth ROSA,
Balanced device and control circuit combination reach or close to high bandwidth ROSA bandwidth original
Reason：
10G ROSA bandwidth is generally any value in 7~8GHz, utilizes 10G
The transmission rate of ROSA compositions is photoreceiver (the abbreviation 10G light-receivings of 10G bits
Machine) AFE(analog front end) frequency response curve it is as shown in Figure 8.Wherein, frequency response curve
Embody frequency response characteristic；Abscissa in Fig. 8 represents 10G ROSA input signal
Frequency F, its unit be hertz (HZ)；Ordinate represents 10G ROSA output letter
Number level V, its unit be decibel (dB).
2.5G ROSA bandwidth is generally any value in 2~4GHz, 2.5G ROSA
Frequency response curve such as in Fig. 9 shown in (1).Balanced device is according to control circuit output
The isostatic compensation factor adjusts the frequency response curve of balanced device；When the frequency response of balanced device is bent
When line is as shown in (2) in Fig. 9,2.5G ROSA, balanced device and control circuit are utilized
(3) institute in the frequency response curve such as Fig. 9 for the AFE(analog front end) for combining the photoreceiver of composition
Show；Now, the frequency response curve in Fig. 9 shown in (3) and frequency as shown in Figure 8
Response curve is identical or close, that is to say, that the bandwidth of the combination can reach or approach
10G ROSA bandwidth.
Photoreceiver provided in an embodiment of the present invention, due to low bandwidth can be utilized
ROSA, balanced device and control the combination of circuit reach or ROSA close to high bandwidth band
Width, is connect so the performance of the photoreceiver can reach by the ROSA of the high bandwidth light constituted
The performance of receipts machine.Due to the ROSA of low bandwidth, balanced device and control circuit combination into
This cost less than the ROSA of high bandwidth, therefore middle utilization high bandwidth compared with the prior art
The photoreceiver of ROSA compositions, photoreceiver provided in an embodiment of the present invention can be saved into
This.
In several embodiments provided herein, it should be understood that disclosed system,
Apparatus and method, can be realized by another way.For example, device described above
Embodiment is only schematical, for example, the division of the unit, only a kind of logic
Such as function is divided, and can have other dividing mode when actually realizing, multiple units or group
Part can combine or be desirably integrated into another system, or some features can be ignored, or
Do not perform.It is another, shown or discussed coupling or direct-coupling or logical each other
Letter connection can be by some interfaces, the INDIRECT COUPLING or communication connection of device or unit,
Can be electrical, machinery or other forms.
The unit illustrated as separating component can be or may not be physically
Separated, the part shown as unit can be or may not be physical location, i.e.,
A place can be located at, or can also be distributed on multiple NEs.Can basis
Some or all of unit therein is selected to realize this embodiment scheme the need for reality
Purpose.
In addition, each functional unit in each embodiment of the invention can be integrated at one
Reason unit in or the independent physics of unit include, can also two or two with
Upper unit is integrated in a unit.Above-mentioned integrated unit can both use the form of hardware
Realize, it would however also be possible to employ hardware adds the form of SFU software functional unit to realize.
Moreover, the word " connection " being related in the present embodiment can be indirectly connected to, it was both
It can represent direct connected by wire between unit or part, can also represent by it
His module or part are connected.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention,
Rather than its limitations；Although the present invention is described in detail with reference to the foregoing embodiments,
It will be understood by those within the art that：It can still be remembered to foregoing embodiments
The technical scheme of load is modified, or carries out equivalent substitution to which part technical characteristic；
And these modifications or replacement, the essence of appropriate technical solution is departed from each reality of the invention
Apply the spirit and scope of a technical scheme.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention
Be not limited thereto, any one skilled in the art the invention discloses skill
In the range of art, change or replacement can be readily occurred in, should all be covered in protection scope of the present invention
Within.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (9)
- The control circuit of a kind of balanced device, it is characterised in that balanced device includes：Input, Output end and control end；The control circuit includes：Relative scale acquisition circuit, comparison are electric Road and balance controller；The relative scale obtains circuit to be included with the balance controller： Input and output end；The comparison circuit includes：First input end, the second input and Output end；The input that the relative scale obtains circuit is connected with the output end of the balanced device；The relative scale obtains the output end of circuit and the first input end of the comparison circuit Connection；Second input of the comparison circuit, relative scale is referred to for receiving；The output end of the comparison circuit is connected with the input of the balance controller；The output end of the balance controller, for exporting the isostatic compensation factor；The output end of the balance controller is connected with the control end of the balanced device；The relative scale is obtained in circuit, the output signal for obtaining the balanced device The actual relative scale of the power of high frequency signal components and the power of middle low frequency signal components, or The power and the output for obtaining the high frequency signal components in the output signal of the balanced device are believed Number power actual relative scale；The comparison circuit, compares for comparing the actual relative scale with the reference Example, obtains comparative result；The balance controller, for adjusting the equal of the balanced device according to the comparative result Weigh compensating factor, to cause the balanced device according to the isostatic compensation factor pair after the regulation The input signal of the balanced device carries out frequency compensation.
- Control circuit according to claim 1, it is characterised in that described to compare Example, which obtains circuit, to be included：First wave filter, the second wave filter, the first power detector, Two power detectors and the first ratio circuit；First ratio circuit includes：First input End, the second input and output end；The input of first wave filter, second wave filter input respectively with institute State the output end connection of balanced device；The output end of first wave filter and the input of first power detector connect Connect；The output end of second wave filter and the input of second power detector connect Connect；The output end of first power detector connects with the first input end of the comparison circuit Connect；The output end of second power detector connects with the second input of the comparison circuit Connect；The output end of first ratio circuit is connected with the input of the balance controller；First wave filter, is filtered for the output signal to the balanced device, obtains To high frequency signal components；Second wave filter, is filtered for the output signal to the balanced device, obtains To middle low frequency signal components；First power detector, the power for detecting the high frequency signal components；Second power detector, the power for detecting the low frequency signal components；First ratio circuit, for obtaining the power of the high frequency signal components with respect to institute The actual relative scale of the power of middle low frequency signal components is stated, or obtains the middle low frequency signal The actual relative scale of the power of the relatively described high frequency signal components of the power of composition.
- Control circuit according to claim 2, it is characterised in that first ratio Be worth circuit, for obtain the power of the high frequency signal components relative to the middle low frequency signal into The actual relative scale of the power divided；The balance controller specifically for：When the comparative result is that the actual relative scale is more than with reference to relative scale, subtract The isostatic compensation factor of the small balanced device；Or,When the comparative result is that the actual relative scale is less than with reference to relative scale, increase The isostatic compensation factor of the big balanced device.
- Control circuit according to claim 2, it is characterised in that first ratio Be worth circuit, for obtain the power of the high frequency signal components relative to the middle low frequency signal into The actual relative scale of the power divided；The balance controller specifically for：When the comparative result is more than the maximum of pre-set interval, reduce the Balance route The isostatic compensation factor of device output；Or,When the comparative result is less than the minimum value of pre-set interval, increase the Balance route The isostatic compensation factor of device output.
- Control circuit according to claim 2, it is characterised in that first filter Ripple device and/or second wave filter are bandpass filter.
- Control circuit according to claim 1, it is characterised in that described to compare Example, which obtains circuit, to be included：3rd wave filter, the 3rd power detector, the 4th power detector With the second ratio circuit；The ratio circuit includes：First input end, the second input and Output end；The input of 3rd wave filter, the input difference of the 4th power detector It is connected with the output end of the balanced device；The output end of 3rd wave filter connects with the input of the 3rd power detector Connect；The output end of 3rd power detector connects with the first input end of the comparison circuit Connect；The output end of 4th power detector connects with the second input of the comparison circuit Connect；The output end of second ratio circuit is connected with the input of the balance controller；3rd wave filter, is filtered for the output signal to the balanced device, obtains To high frequency signal components；3rd power detector, the power for detecting the high frequency signal components；4th power detector, the power of the output signal for detecting the balanced device；Second ratio circuit, for obtaining the power of the high frequency signal components with respect to institute The actual relative scale of the power of output signal is stated, or obtains the power phase of the output signal To the actual relative scale of the power of the high frequency signal components.
- Control circuit according to claim any one of 1-6, it is characterised in that institute Comparison circuit is stated to realize by digital circuit or analog circuit；And/or, the balance controller Realized by digital circuit or analog circuit.
- A kind of balanced device, it is characterised in that including：Input, output end and control end；The input, for receiving input signal；The output end, for output signal；The control end, the isostatic compensation factor after regulation for receiving control circuit output； The control circuit that circuit is controlled for the balanced device described in the claims any one of 1-7.
- A kind of photoreceiver, it is characterised in that including：Optical Receivers ROSA, The control circuit of weighing apparatus, the control balanced device, and limiting amplifier LA；Wherein,Control the balanced device controls circuit for described in the claims any one of 1-7 The control circuit of balanced device；The input of the balanced device, the output signal for receiving the ROSA；The output end of the balanced device is connected with the input of the LA.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2014/082170 WO2016008078A1 (en) | 2014-07-14 | 2014-07-14 | Control circuit for equalizer, equalizer and optical receiver |
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| Publication Number | Publication Date |
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| CN105432031A true CN105432031A (en) | 2016-03-23 |
| CN105432031B CN105432031B (en) | 2017-11-24 |
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| WO (1) | WO2016008078A1 (en) |
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| CN111771343A (en) * | 2018-02-27 | 2020-10-13 | 日本电气株式会社 | Equalizer device, communication system, and equalizing method |
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| CN108521385B (en) * | 2018-03-30 | 2020-12-15 | 中山大学 | Coherent optical communication equalization method using cross hybrid state |
| CN114296507A (en) * | 2021-11-23 | 2022-04-08 | 北京无线电测量研究所 | Broadband waveform generation and channel equalization method and system |
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| WO2016008078A1 (en) | 2016-01-21 |
| CN105432031B (en) | 2017-11-24 |
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