CN207490978U - A kind of FSK modulation device with phase control function - Google Patents
A kind of FSK modulation device with phase control function Download PDFInfo
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- CN207490978U CN207490978U CN201721523024.0U CN201721523024U CN207490978U CN 207490978 U CN207490978 U CN 207490978U CN 201721523024 U CN201721523024 U CN 201721523024U CN 207490978 U CN207490978 U CN 207490978U
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Abstract
The utility model discloses a kind of FSK modulation device with phase control function, including：For generating the first module of the first modulated signal, the second module of phase controlling is carried out for the second modulated signal of generation and to second modulated signal；First module includes the phase frequency detector, charge pump, wave filter, oscillator and the frequency divider that are sequentially connected electrically, and the output terminal of the frequency divider is electrically connected with the first input end of phase frequency detector, the second input termination external pulse signal of phase frequency detector；Second module includes frequency regulation block and phase control module, the input terminal of frequency regulation block is electrically connected with the output terminal of oscillator, the output terminal of frequency regulation block is electrically connected with the first input end of phase control module, and the second input terminal of phase control module is electrically connected with the output terminal of oscillator.The utility model realizes the accurate adjustment to phase of output signal by counter, frequency-halving circuit and XOR gate, has the advantages of simple in structure, easily controllable.
Description
Technical field
The utility model is related to FSK modulation device technical field more particularly to a kind of FSK modulations with phase control function
Device.
Background technology
Fsk modulated signal represents Binary Zero and binary one using different carrier frequencies.In some applications it is desirable to
The phase of signal is accurately adjusted, for example, in wireless charging application, in order to adjust charge power, is needed inverse to full-bridge
The phase for becoming the control signal of device is adjusted, to increase or reduce the time of charging.Wireless charging alliance (Wireless
Power Consortium) wireless charging standard Qi require transmitter output signal phase that can adjust in the protocol, adjust
Range 10%-50%, Adjustment precision≤0.1%.And in prior art designs, generally use MCU (microcontroller) and PWM (pulses
Width modulated) realize the accurate control of phase of output signal, realization method is relative complex.
Utility model content
Shortcoming present in regarding to the issue above, the application provide a kind of FSK modulation with phase control function
Device, the FSK modulation device are realized the accurate adjustment to phase of output signal by counter, frequency-halving circuit and XOR gate, had
The advantages of simple in structure, easily operated.
The FSK modulation device with phase control function includes：For generating the first module of the first modulated signal, it is used for
It generates the second modulated signal and the second module of phase controlling is carried out to second modulated signal；
First module includes the phase frequency detector, charge pump, wave filter, oscillator and the frequency dividing that are sequentially connected electrically
Device, the output terminal of the frequency divider are electrically connected with the first input end of the phase frequency detector, and the second of the phase frequency detector
Input termination external pulse signal；
Second module include frequency regulation block and phase control module, the input terminal of the frequency regulation block with
The output terminal electrical connection of the oscillator, the first input of the output terminal of the frequency regulation block and the phase control module
End electrical connection, the second input terminal of the phase control module are electrically connected with the output terminal of the oscillator.
Optionally, the frequency regulation block is frequency divider.
Optionally, the phase control module includes the control unit for output phase adjusting parameter, for adjusting
State the phasing unit of the second modulating signal phase and for eliminating first modulated signal and the second modulation letter
Number rising edge along deviation caused by phase deviation auxiliary phase adjustment unit；
First output terminal of described control unit is electrically connected with the parameter input end of the auxiliary phase adjustment unit, described
Two signal input parts of auxiliary phase adjustment unit are electrically connected respectively with the oscillator and the frequency regulation block；
Second outlet of described control unit is electrically connected with the parameter input end of the phasing unit, the phase tune
Two signal input parts of whole unit are electrically connected respectively with the oscillator and the frequency regulation block.
Optionally, the phasing unit is identical with the structure of the auxiliary phase adjustment unit, including counter,
Frequency-halving circuit and XOR gate；
The clock signal input terminal of the counter is electrically connected with the oscillator, the enable signal input of the counter
End is electrically connected with the output terminal of the XOR gate, the carry signal output end of the counter and the input of the frequency-halving circuit
End electrical connection, the output terminal of the frequency-halving circuit is electrically connected with the first input end of the XOR gate, and the of the XOR gate
Two input terminals are electrically connected with the frequency regulation block.
Optionally, the frequency regulation block is frequency multiplier.
The FSK modulation device with phase control function of the utility model is by setting phase control module to realize to output
The accurate control of signal phase, and since phase control module includes the identical phasing unit of structure and auxiliary phase tune
Whole unit, therefore phase deviation caused by the rising edge along deviation of two clock signals can be effectively eliminated.By counter, two points
Frequency circuit and XOR gate realize the accurate adjustment to phase of output signal, have it is simple in structure, it is easily controllable, and Adjustment precision
The advantages of can arbitrarily setting as needed.
Description of the drawings
Fig. 1 is the structure diagram of the FSK modulation device with phase control function that the utility model embodiment provides；
Fig. 2 is the phase control module of the FSK modulation device with phase control function that the utility model embodiment provides
Structure diagram；
Fig. 3 is the phasing unit of the FSK modulation device with phase control function that the utility model embodiment provides
With the structure diagram of auxiliary phase adjustment unit；
Fig. 4 is the another of the second module of the FSK modulation device with phase control function that the utility model embodiment provides
One structure diagram；
Fig. 5 is phase adjustment sequence diagram.
Reference sign：
1：First module, 11：Phase frequency detector, 12：Charge pump, 13：Wave filter, 14：Oscillator,
15：Frequency divider, 2：Second module, 21：Frequency regulation block, 22：Phase control module,
221：Control unit, 222：Auxiliary phase adjustment unit, 223：Phasing unit,
2231：XOR gate, 2232：Counter, 2233：Frequency-halving circuit, 23：Frequency multiplier.
Specific embodiment
Purpose, technical scheme and advantage to make the utility model embodiment are clearer, new below in conjunction with this practicality
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the part of the embodiment of the utility model, instead of all the embodiments.Based on the reality in the utility model
Apply example, those of ordinary skill in the art's all other embodiments obtained under the premise of creative work is not made, all
Belong to the range of the utility model protection.
Referring to Fig. 1, Fig. 1 shows the structural representation of the FSK modulation device with phase control function in the present embodiment
Figure, the FSK modulation implement body that should have phase control function are included with lower structure：
For generating the first module 1 of the first modulated signal, for generating the second modulated signal and second modulation being believed
Number carry out phase controlling the second module 2；
Specifically, the first module 1 includes the phase frequency detector 11 being sequentially connected electrically, charge pump 12, filter in the present embodiment
Wave device 13, oscillator 14 and frequency divider 15, the wherein frequency divider 15 be used for the first modulated signal that oscillator 14 exports into
Row M is divided, and output terminal is electrically connected with the first input end of phase frequency detector 11, and the second input termination of phase frequency detector 11 is outer
Portion pulse signal fref；
Second module 2 includes the input of frequency regulation block 21 and phase control module 22, wherein frequency regulation block 21
End is electrically connected with the output terminal of oscillator 14, the output terminal of frequency regulation block 21 and the first input end of phase control module 22
Electrical connection, the second input terminal of phase control module 22 are electrically connected with the output terminal of oscillator 14.
Wherein above-mentioned phase control module 22 is used to carry out control tune to the phase of output signal according to control parameter K
Whole, frequency regulation block 21 can be frequency divider, and the first modulated signal caused by oscillator 14 is the letter of upper frequency at this time
Number fh, the second modulated signal obtained after the Fractional-N frequency by frequency regulation block 21 is the signal fl of lower frequency, such as Fig. 1 institutes
Show.Certain frequency regulation block 21 can also be illustrated in figure 4 frequency multiplier 23, the first modulation caused by oscillator 14 at this time
Signal is the signal fl of lower frequency, becomes the signal fh of upper frequency after frequency multiplier 23.
As shown in fig. 1, the present embodiment first generates the first modulated signal of upper frequency, advantage at the first module 1
It is easier to obtain the signal of more low jitter, while using this first modulated signal as the height of phase control module 22
Frequency inputs, so as to the minimum adjustment benchmark as phase control module 22.Wherein, fl is the modulated signal of system requirements, and K is phase
Position adjustment amount, N can control the precision of phase adjustment, and M can control the modulated signal and modulation depth for generating upper frequency, lead to
The control word M for changing frequency divider 15 in the first module 1 is crossed, the modulated signal corresponding to different modulating depth can be generated.Wherein
M, the value of N, K are PLC technology word.
Further, referring to Fig. 2, Fig. 2 shows the FSK modulation devices with phase control function in the present embodiment
The structure chart of phase control module 22, the phase control module 22 are included for according to above-mentioned K values output phase adjusting parameter K1
With the control unit 221 of K2, wherein K2-K1=K, for the phasing unit 223 for adjusting fl phases and for eliminating fh
With the auxiliary phase adjustment unit 222 of phase deviation caused by the rising edge along deviation of fl.
First output terminal of wherein control unit 221 is electrically connected with the parameter input end of auxiliary phase adjustment unit 222, auxiliary
Two signal input parts of phasing unit 222 is helped to be electrically connected respectively with oscillator 14 and frequency regulation block 21.Control is single
Second outlet of member 221 is electrically connected with the parameter input end of phasing unit 223, two signals of phasing unit 223
Input terminal is electrically connected respectively with oscillator 14 and frequency regulation block 21.
Signal of the above-mentioned fh signals for upper frequency, period TH, and fl signals are then the signal of lower frequency, week
Phase is TL, and TL=N*TH；The wherein output signal out of auxiliary phase adjustment unit 222, phasing unit 223 it is defeated
It is identical with the frequency of fl signals to go out signal outd, and phase has certain delay, and outd signals are relative to out signals, phase
Delay K TH period.
The function of phasing unit 223 is to make out signals relative to the K TH period of fl signal delays.And auxiliary phase
The effect of adjustment unit 222 is to eliminate fl and fh signals rising edge along phase deviation caused by deviation, and out signals is made to believe with outd
Phase difference between number is accurate K/N.In FIG. 2, it is assumed that fl and fh signal initial rising edges deviation time are t, out signals
Delay with fl signals is t+K1*TH, and the delay of outd signals and fl signals is t+K2*TH；Therefore outd signals and out signals it
Between delay be (K2-K1) * TH, i.e. K*TH, phase difference K/N.
Above-mentioned phasing unit 223 is identical with the structure of auxiliary phase adjustment unit 222, about phasing unit
223 and auxiliary phase adjustment unit 222 structure referring to Fig. 3, Fig. 3 shows phasing unit 223 and auxiliary phase tune
The structure chart of whole unit 222；The phasing unit 223 and auxiliary phase adjustment unit 222 include 2232, two points of counter
Frequency circuit 2233 and XOR gate 2231；
The clock signal input terminal of its Counter 2232 is electrically connected with oscillator 14, and the enable signal of counter 2232 is defeated
The output terminal for entering end with XOR gate 2231 is electrically connected, and the carry signal output end of counter 2232 is defeated with frequency-halving circuit 2233
Enter end electrical connection, the output terminal of frequency-halving circuit 2233 and the first input end of XOR gate 2231 are electrically connected, XOR gate 2231
Second input terminal is electrically connected with frequency regulation block 21.
In original state, the output of frequency-halving circuit 2233 is 0, and fl, fh original state are also 0, this hour counter 2232
It does not work；When fl states become 1 from 0 (rising edge), the output of XOR gate 2231 becomes 1, the i.e. enabled letter of counter 2232
Number en becomes high level, this hour counter 2232 starts to count fh；When count value reaches K, the carry letter of counter 2232
Number rco becomes 1 from 0；And frequency-halving circuit 2233 is transported to, the output signal out of frequency-halving circuit 2233 becomes 1 from 0, at this time
The output of XOR gate 2231 becomes 0, and counter 2232 is stopped, and carry signal rco becomes 0 from 1；
When fl becomes 0 from 1, the output of XOR gate 2231 becomes 1, and counter 2232 restarts to count until meter fh
Numerical value reaches K, when the carry signal rco that count value reaches K hour counters 2232 becomes 1 from 0, the output of frequency-halving circuit 2233
Signal out becomes 0 from 1, and the output of XOR gate 2231 at this time becomes 0 from 1, and counter 2232 is stopped, next until fl
A rising edge arrives.
Fig. 5 gives the detailed sequential explanation of phase adjustment.As original state fl and fh rising edge alignments, out signals
Relative to the K TH period of fl signal delays, but in a practical situation, since the rising edge of initial time fh may be in advance or stagnant
After the rising edge of fl；The time difference is t between remembering fl and fh rising edges, then out signals prolong relative to fl signals under actual conditions
The slow time is K*TH+t, and phase difference is (K+t/TH)/N, therefore by introducing auxiliary phase adjustment unit 222, eliminates fl and fh
For signal rising edge along phase deviation caused by deviation, it is accurate K/N to make the phase difference between out signals and outd signals.
I.e. when fl and fh signal initial rising edges deviation time are t, the delay of out signals and fl signals is t+K1*TH, and outd believes
Number it is t+K2*TH with the delays of fl signals；Therefore the delay between outd signals and out signals be (K2-K1) * TH, i.e. K*TH, phase
Potential difference is K/N.
In the present embodiment, the clock cycle TL of fl is N times of clock cycle TH of fh；It carves at the beginning, fl and fh's
Leading edge position is not known, and fh rising edges may rising edge that is advanced or lagging behind fl signals；Therefore the count value of counter 2232
Minimum 1, maximum value N/2-1；The ranging from 1/N to N/2-1 of phase adjustment, the precision of adjustment is 1/N.For example, work as N=
When 1000, the ranging from 0.1%-49.9% of phase adjustment, Adjustment precision 0.1%.According to system for phase adjustment precision
Requirement, the value of N can be flexibly set, to reach corresponding Adjustment precision.
The FSK modulation device with phase control function of the present embodiment believes output by the way that phase control module is set to realize
The accurate control of number phase, and since phase control module includes the identical phasing unit of structure and auxiliary phase adjustment
Unit, therefore phase deviation caused by the rising edge along deviation of two clock signals can be effectively eliminated.Pass through counter, two divided-frequency
Circuit and XOR gate realize the accurate adjustment to phase of output signal, have it is simple in structure, it is easily controllable, and Adjustment precision can
The advantages of arbitrarily to set as needed.
It should be noted that in the utility model embodiment, the appearance of " first ", " second ", it is only for distinguish
Technical term and description are convenient, should not be construed as the restriction to the utility model embodiment.Term " comprising ", "comprising" or its
Any other variant is intended to non-exclusive inclusion so that process, method, article including a series of elements or
Terminal device not only includes those elements, but also including other elements that are not explicitly listed or to further include be this
Process, method, article or the intrinsic element of terminal device.In the absence of more restrictions, by sentence " including one
It is a ... " limit element, it is not excluded that also exist in the process including the element, method, article or terminal device
Other identical element.
It these are only the preferred embodiment of the utility model, be not intended to limit the utility model, for this field
Technical staff for, various modifications and changes may be made to the present invention.Within the spirit and principle of the utility model,
Any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (5)
1. a kind of FSK modulation device with phase control function, which is characterized in that including：For generating the first modulated signal
First module carries out the second module of phase controlling for the second modulated signal of generation and to second modulated signal；
First module includes the phase frequency detector, charge pump, wave filter, oscillator and the frequency divider that are sequentially connected electrically, institute
The output terminal for stating frequency divider is electrically connected with the first input end of the phase frequency detector, the second input terminal of the phase frequency detector
Connect external pulse signal；
Second module include frequency regulation block and phase control module, the input terminal of the frequency regulation block with it is described
The output terminal electrical connection of oscillator, the first input end electricity of the output terminal of the frequency regulation block and the phase control module
Connection, the second input terminal of the phase control module are electrically connected with the output terminal of the oscillator.
2. there is the FSK modulation device of phase control function as described in claim 1, which is characterized in that the frequency adjusts mould
Block is frequency divider.
3. there is the FSK modulation device of phase control function as claimed in claim 2, which is characterized in that the phase controlling mould
Block includes the control unit for output phase adjusting parameter, the phase adjustment list for adjusting second modulating signal phase
Member and phase deviation caused by for eliminating the rising edge along deviation of first modulated signal and second modulated signal
Auxiliary phase adjustment unit；
First output terminal of described control unit is electrically connected with the parameter input end of the auxiliary phase adjustment unit, the auxiliary
Two signal input parts of phasing unit are electrically connected respectively with the oscillator and the frequency regulation block；
Second outlet of described control unit is electrically connected with the parameter input end of the phasing unit, the phase adjustment list
Two signal input parts of member are electrically connected respectively with the oscillator and the frequency regulation block.
4. there is the FSK modulation device of phase control function as claimed in claim 3, which is characterized in that the phase adjustment list
It is first identical with the structure of the auxiliary phase adjustment unit, including counter, frequency-halving circuit and XOR gate；
The clock signal input terminal of the counter is electrically connected with the oscillator, the enable signal input terminal of the counter with
The output terminal electrical connection of the XOR gate, the carry signal output end of the counter and the input terminal electricity of the frequency-halving circuit
Connection, the output terminal of the frequency-halving circuit are electrically connected with the first input end of the XOR gate, and the second of the XOR gate is defeated
Enter end to be electrically connected with the frequency regulation block.
5. there is the FSK modulation device of phase control function as described in claim 1, which is characterized in that the frequency adjusts mould
Block is frequency multiplier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721523024.0U CN207490978U (en) | 2017-11-15 | 2017-11-15 | A kind of FSK modulation device with phase control function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721523024.0U CN207490978U (en) | 2017-11-15 | 2017-11-15 | A kind of FSK modulation device with phase control function |
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| Publication Number | Publication Date |
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| CN207490978U true CN207490978U (en) | 2018-06-12 |
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| CN201721523024.0U Active CN207490978U (en) | 2017-11-15 | 2017-11-15 | A kind of FSK modulation device with phase control function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116346243A (en) * | 2022-11-14 | 2023-06-27 | 青岛泰戈菲斯海洋装备股份公司 | Underwater acoustic serial port communication circuit |
-
2017
- 2017-11-15 CN CN201721523024.0U patent/CN207490978U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116346243A (en) * | 2022-11-14 | 2023-06-27 | 青岛泰戈菲斯海洋装备股份公司 | Underwater acoustic serial port communication circuit |
| CN116346243B (en) * | 2022-11-14 | 2024-02-23 | 青岛泰戈菲斯海洋装备股份公司 | Underwater acoustic serial port communication circuit |
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