CN207573363U - Carrier signal output circuit and communication equipment - Google Patents
Carrier signal output circuit and communication equipment Download PDFInfo
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- CN207573363U CN207573363U CN201721752681.2U CN201721752681U CN207573363U CN 207573363 U CN207573363 U CN 207573363U CN 201721752681 U CN201721752681 U CN 201721752681U CN 207573363 U CN207573363 U CN 207573363U
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Abstract
Carrier signal output circuit and communication equipment provided by the utility model, are related to field of communication technology.Wherein, carrier signal output circuit includes：Crystal oscillator, the crystal oscillator are used to generate and export sine-wave oscillation signal；Frequency counter, the input terminal of the frequency counter are connect with the output terminal of the crystal oscillator, to receive the sine-wave oscillation signal, and the signal are carried out scaling down processing to export square-wave signal；Square wave adjuster, the input terminal of the square wave adjuster are connect with the output terminal of the frequency counter, to receive the square-wave signal, and the duty ratio of the signal are adjusted with outgoing carrier signal；Power supply unit, the output terminal of said supply unit are connect with the power end of the frequency counter, to provide electric energy to the frequency counter.By above-mentioned setting, with improve the carrier signal exported in the prior art there are frequency it is unstable the problem of.
Description
Technical field
The utility model is related to fields of communication technology, are set in particular to a kind of carrier signal output circuit and communication
It is standby.
Background technology
In infrared communication technique, carrier signal is one of key element of infrared communication.Wherein, in the frequency of carrier signal
When rate changes, the transmission range of signal of communication can be not only reduced, can also reduce the accuracy of signal of communication.Inventor is through grinding
Study carefully discovery, the carrier signal exported in existing carrier signal output circuit there are frequency it is unstable the problem of.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of carrier signal output circuit and communication equipment, to change
The kind carrier signal exported in the prior art there are frequency it is unstable the problem of.
To achieve the above object, the utility model embodiment adopts the following technical scheme that：
A kind of carrier signal output circuit, including：
Crystal oscillator, the crystal oscillator are used to generate and export sine-wave oscillation signal；
Frequency counter, the input terminal of the frequency counter are connect with the output terminal of the crystal oscillator, to receive
The sine-wave oscillation signal, and the signal is subjected to scaling down processing to export square-wave signal；
Square wave adjuster, the input terminal of the square wave adjuster are connect with the output terminal of the frequency counter, to receive
The square-wave signal, and the duty ratio of the signal is adjusted with outgoing carrier signal；
Power supply unit, the output terminal of said supply unit are connect with the power end of the frequency counter, with to described point
Frequency counter provides electric energy.
In the utility model embodiment preferably selects, in above-mentioned carrier signal output circuit, the square wave adjustment
Device includes triple gate buffer and high pass filter unit；
The input terminal of the triple gate buffer is connect with the output terminal of the frequency counter, control terminal and controller connect
Connect, output terminal is connect with the input terminal of the high pass filter unit, the output terminal of the high pass filter unit is as the square wave
The output terminal of adjuster is with outgoing carrier signal.
In the utility model embodiment preferably selects, in above-mentioned carrier signal output circuit, the high-pass filtering
Unit includes first resistor and the first capacitance；
One end of first capacitance is connect with the output terminal of the triple gate buffer, the other end and the first resistor
One end connection after output terminal as the high pass filter unit, the other end of the first resistor is grounded.
In the utility model embodiment preferably selects, in above-mentioned carrier signal output circuit, first capacitance
Capacitance for 1000pF, the resistance value of the first resistor is 100k Ω.
In the utility model embodiment preferably selects, in above-mentioned carrier signal output circuit, the square wave adjustment
Device further includes diode, the cathode of the diode and one of first capacitance as the output terminal of the high pass filter unit
End connection, plus earth.
In the utility model embodiment preferably selects, in above-mentioned carrier signal output circuit, the crystal oscillation
Device includes crystal resonator, second resistance, 3rd resistor, the second capacitance and third capacitance；
The crystal resonator connect and leads to the input terminal of the frequency counter with one end after the second resistance parallel connection
Second capacity earth is crossed, the other end is connected by the input terminal of the 3rd resistor and frequency counter and passes through described
Three capacity earths.
In the utility model embodiment preferably selects, in above-mentioned carrier signal output circuit, said supply unit
Including power supply and voltage-stablizer, the power supply is connect by the voltage-stablizer with the power end of the frequency counter.
On the basis of the above, the utility model embodiment additionally provides a kind of communication equipment, including controller, modulation circuit
With above-mentioned carrier signal output circuit；
The first input end of the modulation circuit and the second input terminal respectively with the output terminal of the controller and the load
The output terminal connection of the square wave adjuster of wave signal output apparatus, the signal of communication and the square wave that the controller is exported
The carrier signal of adjuster output is modulated and exports.
In the utility model embodiment preferably selects, in above-mentioned carrier signal output circuit, the modulation circuit
Including the first NAND gate logic chip, wherein, first input end and the controller of the first NAND gate logic chip
Output terminal connection, the second input terminal are connect with the output terminal of the square wave adjuster, output terminal is defeated as the communication equipment
Outlet.
In the utility model embodiment preferably selects, in above-mentioned carrier signal output circuit, the modulation circuit
The second NAND gate logic chip is further included, wherein, the first input end and the second input terminal of the second NAND gate logic chip
It is connect with the output terminal of the controller, output terminal is connect with the first input end of the first NAND gate logic chip.
Carrier signal output circuit and communication equipment provided by the utility model, pass through crystal oscillator, frequency counter
With the cooperation of square wave adjuster, the outgoing carrier signal that can stablize exists to improve the carrier signal exported in the prior art
The problem of frequency is unstable, so as to ensure that the signal of communication being transmitted based on the carrier signal can be transmitted accurately and efficiently
To receiving device, the reliability of carrier signal output circuit and communication equipment is greatly improved.
For the above-mentioned purpose of the utility model, feature and advantage is enable to be clearer and more comprehensible, preferred embodiment cited below particularly, and
Attached drawing appended by cooperation, is described in detail below.
Description of the drawings
Fig. 1 is the application block diagram of communication equipment that the utility model embodiment provides.
Fig. 2 is the structure diagram of communication equipment that the utility model embodiment provides.
Fig. 3 is the structure diagram of modulation circuit that the utility model embodiment provides.
Fig. 4 is the structure diagram of carrier signal output circuit that the utility model embodiment provides.
Fig. 5 is the annexation figure of the crystal oscillator that the utility model embodiment provides and frequency counter.
Fig. 6 is the circuit diagram of square wave adjuster that the utility model embodiment provides.
Fig. 7 is the structure diagram of power supply unit that the utility model embodiment provides.
Icon：10- communication equipments；20- receiving devices；100- carrier signal output circuits；110- crystal oscillators；130-
Frequency counter；150- square wave adjusters；151- triple gate buffers；153- high pass filter units；170- power supply units；171-
Power supply；173- voltage-stablizers；X1- crystal resonators；R1- first resistors；R2- second resistances；R3- 3rd resistors；The first electricity of C1-
Hold；The second capacitances of C2-；C3- third capacitances；D1- diodes；200- controllers；300- modulation circuits；The first NAND gates of U1- are patrolled
Collect chip；U2- the second NAND gate logic chips.
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 utility model part of the embodiment, instead of all the embodiments.Usually here described in attached drawing and
The component of the utility model embodiment shown can be configured to arrange and design with a variety of different.
Therefore, requirement is not intended to limit to the detailed description of the embodiment of the utility model provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model
Embodiment, those of ordinary skill in the art's all other embodiments obtained without creative efforts, all
Belong to the range of the utility model protection.
It should be noted that：Similar label and letter represents similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need to that it is further defined and explained in subsequent attached drawing.
In the foregoing description of the utility model, it should be noted that the orientation of the instructions such as term " one end ", " other end "
Or position relationship be based on orientation shown in the drawings or position relationship or the utility model product using when usually put
Orientation or position relationship are for only for ease of description the utility model and simplify description rather than instruction or imply signified dress
It puts or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that the utility model
Limitation.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and it is not intended that instruction or hint phase
To importance.
As shown in Figure 1, the utility model embodiment provides a kind of communication equipment 10, controlled for being sent to receiving device 20
Signal processed, so that the receiving device 20 works according to the control signal.Wherein, the control signal is believed including carrier wave
Number and signal of communication, the carrier signal is for carrying the signal of communication.
Optionally, the transmission form of the control signal is unrestricted, for example, it may be being sent in the form of infrared signal
To the receiving device 20.Wherein, the frequency of the carrier signal is unrestricted, in the present embodiment, in the communication equipment
10 and receiving device 20 be applied to infrared copy meter technology in when, the frequency of the carrier signal is preferably 38kHz.
With reference to Fig. 2, in the present embodiment, the communication equipment 10 includes carrier signal output circuit 100, controller 200
With modulation circuit 300.Wherein, the first input end of the modulation circuit 300 and the second input terminal respectively with the controller 200
Output terminal connected with the output terminal of the carrier signal output circuit 100.
Signal of communication and the carrier signal output that the controller 200 exports are received in the modulation circuit 300
Modulation treatment is carried out after the carrier signal that circuit 100 exports, to obtain control signal and export to the receiving device 20.
Optionally, the concrete type of the controller 200 is unrestricted, for example, it may be microcontroller, programmable logic control
Device and digital signal processor processed etc..In the present embodiment, the controller 200 is preferably microcontroller.
Optionally, the electrical equipment that the modulation circuit 300 includes is unrestricted, if can by the signal of communication and
Carrier signal is overlapped to complete modulation treatment and export.In the present embodiment, with reference to Fig. 3, the modulation circuit 300
Can include the first NAND gate logic chip U1, wherein, the first input end of the first NAND gate logic chip U1 with it is described
The output terminal connection of controller 200, the second input terminal is connect with the output terminal of the square wave adjuster 150, output terminal is as institute
State the output terminal of communication equipment 10.
Further, it is contemplated that the receiving device 20, can be according to preset communication after the control signal is received
Agreement parses, and perform corresponding action according to the result of parsing the control signal, wherein, according to communication protocol
Content is different, and the modulation circuit 300 can also include the second NAND gate logic chip U2, wherein, second NAND gate is patrolled
The first input end and the second input terminal of volume chip U2 is connect with the output terminal of the controller 200, output terminal and described first
The first input end connection of NAND gate logic chip U1.
Wherein, the concrete model of the first NAND gate logic chip U1 and the second NAND gate logic chip U2 are unrestricted
System, as long as having the function of just to export high level only in the equal input high level of two input terminals.In the present embodiment, institute
The model for stating the first NAND gate logic chip U1 and the second NAND gate logic chip U2 can be 74HC00.
With reference to Fig. 4, the present embodiment also provides a kind of carrier signal output circuit that can be applied to above-mentioned communication equipment 10
100.Wherein, the carrier signal output circuit 100 includes crystal oscillator 110, frequency counter 130, square wave adjuster 150
With power supply unit 170.
Further, in the present embodiment, the output terminal of the crystal oscillator 110 and the frequency counter 130
Input terminal connects, and the output terminal of the Color seperation grating device is connect with the input terminal of the square wave adjuster 150, the square wave adjustment
Second input of the output terminal of device 150 as the output terminal of the carrier signal and the modulation circuit 300 of the communication equipment 10
End connection, the output terminal of said supply unit 170 are connect with the power end of the frequency counter 130 with to the frequency division counter
Device 130 provides electric energy.
Wherein, the crystal oscillator 110 generates sine-wave oscillation signal and exports to the frequency counter 130, institute
It states frequency counter 130 and the sine-wave oscillation signal received is subjected to scaling down processing to obtain square-wave signal and export to described
The square-wave signal received is carried out duty ratio adjustment processing to obtain carrier wave by square wave adjuster 150, the square wave adjuster 150
Signal is simultaneously exported to the modulation circuit 300.
Optionally, the electrical equipment that the crystal oscillator 110 includes is unrestricted, can be set according to actual demand
It puts.For example, crystal oscillator element can be included, the auxiliary electricals elements such as resistance and capacitance can also be included.In the present embodiment, with reference to
Fig. 5, the crystal oscillator 110 include crystal resonator X1, second resistance R2,3rd resistor R3, the second capacitance C2 and third capacitance
C3。
Wherein, one end after the crystal resonator X1 is in parallel with the second resistance R2 is defeated with the frequency counter 130
Enter end connection and defeated by the 3rd resistor R3 and frequency counter 130 by the second capacitance C2 ground connection, the other end
Enter end connection and be grounded by the third capacitance C3.
Optionally, the tool of the crystal resonator X1, second resistance R2,3rd resistor R3, the second capacitance C2 and third capacitance C3
Body electrical value is unrestricted, can be configured according to actual demand.In the present embodiment, the working frequency of the crystal resonator X1
Can be 2.4576MHz, the resistance value of the second resistance R2 can be 2M Ω, and the resistance value of the 3rd resistor R3 can be
The capacitance of 4.7k Ω, the second capacitance C2 and the third capacitance C3 can be 10pF.
Optionally, the concrete model of the frequency counter 130 is unrestricted, for example, it may be 74HC4060.Wherein,
The frequency counter 130 of model 74HC4060 can realize that 4-14 is divided.In the present embodiment, it is contemplated that the crystal resonator X1
The frequency of the sine-wave oscillation signal of output is 2.4576MHz, and the frequency of the carrier signal needed is 38kHz, the frequency dividing meter
Number device 130 can carry out 6 frequency dividings to obtain the square-wave signal of 38kHz.
Optionally, the electrical equipment that the square wave adjuster 150 includes is unrestricted, can be set according to actual demand
It puts, is configured for example, can be acted according to the specific execution of the square wave adjuster 150.In the present embodiment, with reference to Fig. 6,
In view of needing to control whether the square wave adjuster 150 outgoing carrier signal and carries out the adjustment of duty ratio and handle, the side
Wave adjuster 150 includes triple gate buffer 151 and high pass filter unit 153.
Wherein, the input terminal of the triple gate buffer 151 connect with the output terminal of the frequency counter 130, controls
End is connect with controller 200, output terminal is connect with the input terminal of the high pass filter unit 153, the high pass filter unit 153
Output terminal as the square wave adjuster 150 output terminal with outgoing carrier signal.
When the triple gate buffer 151 receives the square-wave signal that the frequency counter 130 exports, if receiving
The high level signal that the controller 200 exports, then control the square-wave signal to export to the high pass filter unit 153, institute
State high pass filter unit 153 ensure square-wave signal frequency it is constant when can will shorten square-wave signal high level duration simultaneously
Modulation circuit 300 cannot be timely responded to and be caused when increasing low level duration, and then solving due to high level steering low level
In signal of communication the problem of high level corresponding duration increase.
Optionally, the concrete model of the triple gate buffer 151 is unrestricted, as long as with being controlled by low and high level
The ability of the output of signal.In the present embodiment, the model of the triple gate buffer 151 can be 74HC125.
Further, in the present embodiment, the high pass filter unit 153 can include first resistor R1 and the first capacitance
C1.Wherein, one end of the first capacitance C1 connect with the output terminal of the triple gate buffer 151, the other end and described the
Output terminal after one end connection of one resistance R1 as the high pass filter unit 153, another termination of the first resistor R1
Ground.
Optionally, the specific size of the resistance value of the first resistor R1 and the capacitance of the first capacitance C1 is unrestricted
System, can be configured according to actual demand, for example, can be carried out according to the amplitude that the duration of the high level of square-wave signal shortens
Setting.In the present embodiment, the capacitance of the first capacitance C1 is preferably 1000pF, and the resistance value of the first resistor R1 is excellent
It is selected as 100k Ω.
Further, to avoid the burr interference signal that low and high level in the square-wave signal is generated in conversion to communication
The influence of signal, in the present embodiment, the square wave adjuster 150 further include diode D1.Wherein, the moon of the diode D1
Pole is connect with the first capacitance C1 as one end of the output terminal of the high pass filter unit 153, plus earth.
Optionally, the concrete model of the diode D1 is unrestricted, can be configured according to actual demand, for example,
It can be configured according to the frequency of the square-wave signal, the amplitude of burr interference signal.In the present embodiment, the diode
The model of D1 can be IN4148.
Optionally, the electrical equipment that said supply unit 170 includes is unrestricted, for example, can only include power supply, also may be used
To include power supply and voltage stabilizing element.In the present embodiment, it is steady to ensure to provide voltage to the frequency counter 130 with reference to Fig. 7
Fixed electric energy, said supply unit 170 can include power supply 171 and voltage-stablizer 173.Wherein, the power supply 171 is logical
The power end that the voltage-stablizer 173 is crossed with the frequency counter 130 is connect, so that the electric energy that the power supply 171 provides
It is exported after being handled by the voltage-stablizer 173 to the frequency counter 130.
In conclusion carrier signal output circuit 100 provided by the utility model and communication equipment 10, pass through crystal oscillation
The cooperation of device 110, frequency counter 130 and square wave adjuster 150, the outgoing carrier signal that can stablize, to improve existing skill
The carrier signal exported in art there are frequency it is unstable the problem of, so as to ensure the communication being transmitted based on carrier signal letter
Number receiving device 20 can be accurately and efficiently transmitted to, greatly improve carrier signal output circuit 100 and communication equipment 10
Reliability.
In the description of the present invention, unless otherwise clearly defined and limited, term " setting ", " connection " should be done extensively
Reason and good sense solution, for example, it may be being fixedly connected or being detachably connected or be integrally connected；Can be mechanical connection,
It can be electrical connection；It can be directly connected, can also be indirectly connected by intermediary, can be the company inside two elements
It is logical.For the ordinary skill in the art, it can understand that above-mentioned term is specific in the utility model with concrete condition
Meaning.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of carrier signal output circuit, which is characterized in that including：
Crystal oscillator, the crystal oscillator are used to generate and export sine-wave oscillation signal；
Frequency counter, the input terminal of the frequency counter is connect with the output terminal of the crystal oscillator, with described in reception
Sine-wave oscillation signal, and the signal is subjected to scaling down processing to export square-wave signal；
Square wave adjuster, the input terminal of the square wave adjuster is connect with the output terminal of the frequency counter, with described in reception
Square-wave signal, and the duty ratio of the signal is adjusted with outgoing carrier signal；
Power supply unit, the output terminal of said supply unit are connect with the power end of the frequency counter, in terms of to the frequency dividing
Number device provides electric energy.
2. carrier signal output circuit according to claim 1, which is characterized in that the square wave adjuster includes triple gate
Buffer and high pass filter unit；
The input terminal of the triple gate buffer is connect with the output terminal of the frequency counter, control terminal and controller connect,
Output terminal is connect with the input terminal of the high pass filter unit, and the output terminal of the high pass filter unit is adjusted as the square wave
The output terminal of device is with outgoing carrier signal.
3. carrier signal output circuit according to claim 2, which is characterized in that the high pass filter unit includes first
Resistance and the first capacitance；
One end of first capacitance is connect with the output terminal of the triple gate buffer, the other end and the one of the first resistor
Output terminal after the connection of end as the high pass filter unit, the other end ground connection of the first resistor.
4. carrier signal output circuit according to claim 3, which is characterized in that the capacitance of first capacitance is
1000pF, the resistance value of the first resistor is 100k Ω.
5. carrier signal output circuit according to claim 3, which is characterized in that the square wave adjuster further includes two poles
Pipe, the cathode of the diode is connect with one end of output terminal of first capacitance as the high pass filter unit, anode
Ground connection.
6. according to the carrier signal output circuit described in claim 1-5 any one, which is characterized in that the crystal oscillator
Including crystal resonator, second resistance, 3rd resistor, the second capacitance and third capacitance；
The crystal resonator connect with the input terminal of the frequency counter with one end after the second resistance parallel connection and passes through institute
State the second capacity earth, the other end is connected by the input terminal of the 3rd resistor and frequency counter and electric by the third
Hold ground connection.
7. according to the carrier signal output circuit described in claim 1-5 any one, which is characterized in that said supply unit packet
Power supply and voltage-stablizer are included, the power supply is connect by the voltage-stablizer with the power end of the frequency counter.
8. a kind of communication equipment, which is characterized in that including described in controller, modulation circuit and claim 1-7 any one
Carrier signal output circuit；
The first input end of the modulation circuit and the second input terminal are believed respectively with the output terminal of the controller and the carrier wave
The output terminal connection of the square wave adjuster of number output circuit, the signal of communication that the controller is exported and square wave adjustment
The carrier signal of device output is modulated and exports.
9. communication equipment according to claim 8, which is characterized in that the modulation circuit includes the first NAND gate logic core
Piece, wherein, the first input end of the first NAND gate logic chip is connect with the output terminal of the controller, the second input terminal
It is connect with the output terminal of the square wave adjuster, output terminal of the output terminal as the communication equipment.
10. communication equipment according to claim 9, which is characterized in that the modulation circuit further includes the second NAND gate and patrols
Chip is collected, wherein, the first input end and the second input terminal of the second NAND gate logic chip and the output of the controller
End connection, output terminal are connect with the first input end of the first NAND gate logic chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721752681.2U CN207573363U (en) | 2017-12-14 | 2017-12-14 | Carrier signal output circuit and communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721752681.2U CN207573363U (en) | 2017-12-14 | 2017-12-14 | Carrier signal output circuit and communication equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207573363U true CN207573363U (en) | 2018-07-03 |
Family
ID=62687042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721752681.2U Expired - Fee Related CN207573363U (en) | 2017-12-14 | 2017-12-14 | Carrier signal output circuit and communication equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207573363U (en) |
-
2017
- 2017-12-14 CN CN201721752681.2U patent/CN207573363U/en not_active Expired - Fee Related
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Granted publication date: 20180703 |