CN207442794U - A kind of high-precision sinusoidal signal generating system - Google Patents
A kind of high-precision sinusoidal signal generating system Download PDFInfo
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- CN207442794U CN207442794U CN201721603190.1U CN201721603190U CN207442794U CN 207442794 U CN207442794 U CN 207442794U CN 201721603190 U CN201721603190 U CN 201721603190U CN 207442794 U CN207442794 U CN 207442794U
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- sinusoidal signal
- frequency
- adder
- generating system
- precision
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Abstract
The utility model discloses a kind of high-precision sinusoidal signal generating systems, including power supply, frequency-generation components, adder, comparator, programme control circut amplifier and the display being sequentially connected electrically, the sinusoidal signal is sent to the adder by the frequency-generation components for generating sinusoidal signal；The adder is used to raising the voltage of the sinusoidal signal, and is sent to the comparator by the sinusoidal signal after voltage is raised；The comparator for changing the sinusoidal signal duty cycle, to generate square wave and the square wave be sent in the programme control circut amplifier；The programme control circut amplifier is for receiving the square wave, and after the square wave is amplified, exports to being shown on the display.The high-precision sinusoidal signal generating system that the utility model embodiment provides can utilize comparator to adjust the sinusoidal signal generated, so that the frequency-adjustable of the sinusoidal signal of generation, meets different frequency requirement.
Description
Technical field
The utility model is related to signal generator technical fields more particularly to a kind of high-precision sinusoidal signal to be
System.
Background technology
With the development of technology, the exciting technique of the various electromagnetic sensors in electronic instrument field is also evolving.Currently
Sinusoidal signal generation mainly have following two modes, one is realizing the hair of sinusoidal signal using phase-locked loop integrated chip
It is raw.Since phase-locked loop is equivalent to specialized narrowband tracking filter, the signal of required frequency can be selected well, is inhibited miscellaneous
Component is dissipated, and avoids and largely uses wave filter.But phase-locked loop can not easily change signal frequency, so as to expire
The requirement of foot adjustment sinusoidal signal.The second is using conventional digital signal generator, still, digital signal generator, which exists, to be driven
The problems such as dynamic power is relatively low, hardware system is cumbersome, and frequency switching time is long, frequency resolution is not high, and output phase is discontinuous.
Utility model content
The utility model embodiment discloses a kind of high-precision sinusoidal signal generating system, can realize frequency-adjustable and
The precision of output signal can be effectively improved.
In order to achieve the above object, the utility model provides a kind of high-precision sinusoidal signal generating system, the height
The sinusoidal signal generating system of precision includes：
Power supply, frequency-generation components, adder, comparator, programme control circut amplifier and the display being sequentially connected electrically,
The frequency-generation components send the sinusoidal signal to the adder for generating sinusoidal signal；The adder is used
In the voltage for raising the sinusoidal signal, and the sinusoidal signal after raising voltage is sent to the comparator；The comparison
Device for changing the sinusoidal signal duty cycle, to generate square-wave signal and send the square-wave signal to the programme control circut
In amplifier；The programme control circut amplifier is used to receive the square-wave signal and amplifies the square-wave signal, the display
For showing the amplified square-wave signal.
As an alternative embodiment, in the utility model embodiment, the frequency-generation components include frequency
Maker, the phase accumulator being electrically connected with the frequency generator and the converter being electrically connected with the phase accumulator, institute
Frequency generator is stated for generating frequency and being sent in the phase accumulator, the phase accumulator receives the frequency simultaneously
According to the frequency output phases code to the converter, the converter obtains the sinusoidal letter for converting the phase code
Number.
As an alternative embodiment, in the embodiment of the utility model, the frequency generator can for scene
Program gate array.
As an alternative embodiment, in the embodiment of the utility model, the frequency synthesis component further includes
Waveform reservoir, the waveform reservoir are electrically connected with the phase accumulator and the converter, the waveform reservoir
After storing the phase code and output amplitude coding corresponding with the phase code, the amplitude coding is sent to described turn
In parallel operation.
As an alternative embodiment, in the utility model embodiment, the sinusoidal signal generating system is also wrapped
Low pass filter is included, the low-pass filter is electrically connected with the converter and the adder, and the low-pass filter is used
In the sinusoidal signal for receiving the converter transmission and the sinusoidal signal is filtered.
As an alternative embodiment, in the utility model embodiment, low-pass filter and the converter are stated
It is connected by connecting wire, impedance matching box, institute is provided on one end that the connecting wire is connected with the low-pass filter
Impedance matching box is stated for carrying out impedance matching to the sinusoidal signal.
As an alternative embodiment, in the utility model embodiment, the adder also with the program-controlled electric
Road amplifier electrical connection, the adder are additionally operable to the sinusoidal signal being divided into the first sinusoidal signal and the second sinusoidal signal,
After first sinusoidal signal raises voltage via the adder, the comparator is sent to；The second sinusoidal signal warp
After raising voltage by the adder, the programme control circut amplifier is sent to, after amplifying via the programme control circut amplifier,
Second sinusoidal signal is sent to be shown to the display.
As an alternative embodiment, in the utility model embodiment, the comparator is voltage comparator.
Compared with prior art, the utility model embodiment has the advantages that：
A kind of high-precision sinusoidal signal generating system that the utility model embodiment provides is sequentially connected electrically by setting
Frequency-generation components, adder, comparator, programme control circut amplifier and display, utilize frequency-generation components generation sinusoidal
Signal is sent to after the voltage of sinusoidal signal is then raised by adder in comparator, then changes sinusoidal letter by comparing device
Number duty cycle obtain amplified square-wave signal and in display eventually by programme control circut amplifier to generate square-wave signal
Upper display.Using aforesaid way, comparator can be utilized to adjust the sinusoidal signal of generation, so that the sinusoidal signal of generation
Frequency-adjustable meets different frequency requirement.In addition, a kind of high-precision sinusoidal signal that the utility model embodiment provides occurs
System has the advantages that simple in structure, signal generation mode is simple and fast and with high accuracy.
Description of the drawings
In order to illustrate more clearly of the technical scheme in the embodiment of the utility model, will make below to required in embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the utility model,
For those of ordinary skill in the art, without creative efforts, can also be obtained according to these attached drawings
Other attached drawings.
Fig. 1 is the structure diagram for the high-precision sinusoidal signal generating system that the utility model embodiment provides.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
It clearly and completely describes, it is clear that described embodiment is only the reality of the utility model part of the embodiment rather than whole
Apply example.Based on the embodiment in the utility model, those of ordinary skill in the art institute without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
In the utility model, term " on ", " under ", "left", "right", "front", "rear", " top ", " bottom ", " interior ", " outer ",
" in ", " vertical ", " level ", " transverse direction ", the orientation of the instructions such as " longitudinal direction " or position relationship be based on orientation shown in the drawings or
Position relationship.These terms are not intended to limit indicated primarily to preferably describe the utility model and embodiment
Device, element or component must have and particular orientation or constructed and operated with particular orientation.
Also, above-mentioned part term is in addition to it can be used to indicate that orientation or position relationship, it is also possible to for representing it
His meaning, such as term " on " also be likely used for representing certain relations of dependence or connection relation in some cases.For ability
For the those of ordinary skill of domain, concrete meaning of these terms in the utility model can be understood as the case may be.
In addition, term " installation ", " setting ", " being equipped with ", " connection ", " connected " should be interpreted broadly.It is for example, it may be solid
Fixed connection, is detachably connected or monolithic construction；Can be mechanical connection or electrical connection；It can be directly connected, either
The connections of two inside between device, element or component are indirectly connected or are by intermediary.For this field
For those of ordinary skill, concrete meaning of the above-mentioned term in the utility model can be understood as the case may be.
In addition, term " first ", " second " etc. are mainly used for distinguishing different devices, element or component (specifically
Species and construction may it is identical may also be different), be not intended to show or imply meaning showing device, element or component
Relative importance and quantity.Unless otherwise indicated, the meaning of " multiple " is two or more.
Attached drawing is combined below to be described in detail.
Referring to Fig. 1, a kind of structure of the high-precision sinusoidal signal generating system provided for the utility model embodiment
Schematic diagram, the high-precision sinusoidal signal generating system include the power supply 10, frequency-generation components 20, adder being sequentially connected electrically
30th, comparator 40, programme control circut amplifier 50 and display 60, the frequency-generation components 20 are used to generate sinusoidal signal, and will
Sinusoidal signal is sent in adder 30.The adder 30 is used to raise the voltage of the sinusoidal signal, and after voltage being raised
Sinusoidal signal is sent to comparator 40.The comparator 40 for changing the sinusoidal signal duty cycle, to generate square-wave signal simultaneously
The square-wave signal is sent in programme control circut amplifier 50.The programme control circut amplifier 50 is used to receive the square-wave signal and incite somebody to action
After the square-wave signal is amplified, export to being shown on display 60.
Using aforesaid way, user can not only adjust its frequency after sinusoidal signal generates, and also can ensure that simultaneously
Square-wave signal after output is with more stable signal amplitude and with higher precision.In addition, using display 60
Design, user can be in 60 direct viewing of display to the square-wave signal of output, user experience height.
In the present embodiment, which can be selected external power supply either Rechargeable battery.The frequency-generation components
20 may include frequency generator 21, the phase accumulator 22 being electrically connected with the frequency generator 21 and with the phase accumulator 22
The converter 23 of electrical connection.For the frequency generator 21 for generating frequency and being sent in phase accumulator 22, this is phase-accumulated
Device 22 receives the frequency and according to the frequency output phases code to the converter 23, which is used to carry out the phase code
It is converted to above-mentioned sinusoidal signal.
Preferably, which is field programmable gate array (Field-Programmable Gate Array
FPGA).By the internal clocking of FPGA after 3 frequencys multiplication, obtain f reference clocks using 4 frequency dividings and be conveyed into phase accumulator
In 22.
Further, which further includes waveform reservoir 24, which tires out with the phase
Device 22 and converter 23 is added to be electrically connected, which is used to store the phase code and defeated of the phase accumulator 22 output
Go out with after the corresponding amplitude coding of the phase code, being sent in the converter 23.Specifically, the frequency generator 21 is raw first
It into frequency and is sent in phase accumulator 22, the phase accumulator 22 output in one clock signal of every increase increases by one
The phase increment value (i.e. phase code) of a step-length, and be sent in waveform reservoir 24, which can receive this
Phase code, and corresponding different phase code exports different amplitude codings, is obtained after then being converted using converter 23
The sinusoidal signal.It can learn, in this course, by frequency control word the frequency generator 21 can be controlled to generate
Frequency, so as to achieve the purpose that control the phase accumulator 22 phase increment value.Preferably, which turns for A/D
Parallel operation.That is, the amplitude coding of the waveform reservoir 24 output by converter 23 is converted into digital signal, (that is, this is being just
String signal).
In the present embodiment, since the sine wave that frequency-generation components 20 directly generate has some self-excitations and clutter, especially
It is in high-frequency, and therefore, the sinusoidal signal generating system of the application further includes low-pass filter 70, the low-pass filter 70
It is electrically connected with the converter 23 and adder 30, which is used to receive the sinusoidal signal of the converter 23 transmission
And after being filtered to the sinusoidal signal, it is sent in the adder 30.It, can be with using the setting for increasing the low-pass filter 70
The clutter in the sinusoidal signal is effectively filtered, so that the waveform of the sinusoidal signal is more smooth.
Further, which can be connected with the converter 23 by connecting wire 71, and the connecting wire
Impedance matching box (not shown) is provided on 71 one end being connected with the low-pass filter 70, which is used for sine
After signal carries out impedance matching, retransmit to being filtered in the low-pass filter 70.Using in the connecting wire 71 and low pass
The mode of the impedance matching box on one end that wave filter 70 connects is set, sinusoidal signal can be carried out using the impedance matching box
Impedance matching, it is too low and cause to influence filter effect so as to effectively solve the signal amplitude directly inputted due to the converter 23
Problem advantageously ensures that the filter effect of the low-pass filter 70.
In the present embodiment, in order to further meet the generation of unlike signal, which also puts with the programme control circut
Big device 50 is electrically connected, which is additionally operable to the sinusoidal signal being divided into the first sinusoidal signal and the second sinusoidal signal, this
After one sinusoidal signal raises voltage via the adder 30, it is sent in comparator 40 and is adjusted duty cycle；Second sine
After signal raises voltage via the adder 30, programme control circut amplifier 50 is sent to, is put via the programme control circut amplifier 50
After big, which is sent on the display 60 and is shown.That is, the sinusoidal signal enters the addition
After device 30, two-way is divided into, is respectively first sinusoidal signal and the second sinusoidal signal, since first sinusoidal signal is lifted
It is sent to after high voltage in comparator and carries out duty cycle adjustment, obtain square-wave signal, and second sinusoidal signal is elevated voltage
After be sent directly to directly be amplified in programme control circut amplifier 50.Therefore, end user can the side of seeing on the display 60
Ripple signal and sine wave.In this way, the frequency of sinusoidal signal can not only be adjusted, additionally it is possible to meet generation different frequency
Waveform, so as to be suitable for different electronic instrument devices.
A kind of high-precision sinusoidal signal generating system that the utility model embodiment provides is sequentially connected electrically by setting
Frequency-generation components, adder, comparator, programme control circut amplifier and display, utilize frequency-generation components generation sinusoidal
Signal is sent to after the voltage of sinusoidal signal is then raised by adder in comparator, then changes sinusoidal letter by comparing device
Number duty cycle obtain amplified square-wave signal and in display eventually by programme control circut amplifier to generate square-wave signal
Upper display.Using aforesaid way, comparator can be utilized to adjust the sinusoidal signal of generation, so that the sinusoidal signal of generation
Frequency-adjustable meets different frequency requirement.In addition, a kind of high-precision sinusoidal signal that the utility model embodiment provides occurs
System has the advantages that simple in structure, signal generation mode is simple and fast and with high accuracy.
High-precision sinusoidal signal generating system disclosed in the utility model embodiment is described in detail above, this
It applies specific case in text to be set forth the principle and embodiment of the utility model, the explanation of above example is
It is used to help understand the high-precision sinusoidal signal generating system and its core concept of the utility model；Meanwhile for this field
Those skilled in the art, according to the thought of the utility model, there will be changes in specific embodiments and applications,
To sum up, this specification content should not be construed as the limitation to the utility model.
Claims (8)
1. a kind of high-precision sinusoidal signal generating system, which is characterized in that including be sequentially connected electrically power supply, frequency generation group
Part, adder, comparator, programme control circut amplifier and display, the frequency-generation components are used to generate sinusoidal signal, and
The sinusoidal signal is sent to the adder；The adder is used to raise the voltage of the sinusoidal signal, and sends and raise
The sinusoidal signal after voltage is to the comparator；The comparator for changing the sinusoidal signal duty cycle, with life
Into square-wave signal and send in the square-wave signal to the programme control circut amplifier；The programme control circut amplifier is used to receive
The square-wave signal simultaneously amplifies the square-wave signal, and the display is used to show the amplified square-wave signal.
A kind of 2. high-precision sinusoidal signal generating system according to claim 1, which is characterized in that the frequency generation
Component includes frequency generator, the phase accumulator being electrically connected with the frequency generator and is electrically connected with the phase accumulator
The converter connect, the frequency generator is for generating frequency and being sent in the phase accumulator, the phase accumulator
Receive the frequency and according to the frequency output phases code to the converter, the converter is used to convert the phase code
Obtain the sinusoidal signal.
A kind of 3. high-precision sinusoidal signal generating system according to claim 2, which is characterized in that the frequency generation
Device is field programmable gate array.
A kind of 4. high-precision sinusoidal signal generating system according to claim 2, which is characterized in that the frequency generation
Component further includes waveform reservoir, and the waveform reservoir is electrically connected with the phase accumulator and the converter, described
After waveform reservoir is for storing the phase code and output amplitude coding corresponding with the phase code, sends the amplitude and compile
In code to the converter.
A kind of 5. high-precision sinusoidal signal generating system according to claim 3 or 4, which is characterized in that the sine
Signal generating system further includes low-pass filter, and the low-pass filter is electrically connected with the converter and the adder,
The low-pass filter is used to receive the sinusoidal signal that the converter is sent and the sinusoidal signal is filtered.
A kind of 6. high-precision sinusoidal signal generating system according to claim 5, which is characterized in that the low-pass filtering
Device is connected with the converter by connecting wire, is provided on one end that the connecting wire is connected with the low-pass filter
Impedance matching box, the impedance matching box are used to carry out impedance matching to the sinusoidal signal.
A kind of 7. high-precision sinusoidal signal generating system according to any one of claims 1 to 4, which is characterized in that institute
It states adder to be also electrically connected with the programme control circut amplifier, the adder is additionally operable to the sinusoidal signal being divided into first just
String signal and the second sinusoidal signal after first sinusoidal signal raises voltage via the adder, are sent to the comparison
Device；After second sinusoidal signal raises voltage via the adder, the programme control circut amplifier is sent to, via described
After the amplification of programme control circut amplifier, send second sinusoidal signal and shown to the display.
A kind of 8. high-precision sinusoidal signal generating system according to any one of claims 1 to 4, which is characterized in that institute
Comparator is stated as voltage comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721603190.1U CN207442794U (en) | 2017-11-24 | 2017-11-24 | A kind of high-precision sinusoidal signal generating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721603190.1U CN207442794U (en) | 2017-11-24 | 2017-11-24 | A kind of high-precision sinusoidal signal generating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207442794U true CN207442794U (en) | 2018-06-01 |
Family
ID=62288246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721603190.1U Expired - Fee Related CN207442794U (en) | 2017-11-24 | 2017-11-24 | A kind of high-precision sinusoidal signal generating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207442794U (en) |
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2017
- 2017-11-24 CN CN201721603190.1U patent/CN207442794U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180601 Termination date: 20191124 |
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| CF01 | Termination of patent right due to non-payment of annual fee |