CN208283775U - A kind of IF Modulation module - Google Patents
A kind of IF Modulation module Download PDFInfo
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- CN208283775U CN208283775U CN201820936841.7U CN201820936841U CN208283775U CN 208283775 U CN208283775 U CN 208283775U CN 201820936841 U CN201820936841 U CN 201820936841U CN 208283775 U CN208283775 U CN 208283775U
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Abstract
The utility model provides a kind of IF Modulation module, belongs to microelectronics frequency modulating technology field.The IF Modulation module includes processor unit, amplifier unit and switch unit, the processor unit includes the processor of built-in D/A conversion unit, the amplifier unit includes operational amplifier, the input terminal of the operational amplifier is connected to the processor, the switch unit includes analog switch, the analog switch is connect with the output end of the processor, the dual operational amplifier respectively, and modulated medium frequency signal is exported after the signal sent to the processor and the dual operational amplifier is handled.The IF Modulation module, which directlys adopt, to be built-in with the processor of analog conversion function and connect with amplifier unit, without analog to digital conversion circuit is separately provided, and modulated medium frequency signal is exported by analog switch, make circuit performance more reliable and more stable while reducing manufacturing cost by reducing component number, simplifying manufacture craft.
Description
Technical field
The utility model relates to microelectronics frequency modulating technology fields, in particular to a kind of IF Modulation module.
Background technique
With the fast development of modern social economy, people's lives rhythm is also getting faster, the pressure in work and life
Power also increases rapidly, and the illnesss such as physical fatigue, headache for thus causing are also increasing, therefore various elimination human nerves are tired
Labor, analgesic therapeutic equipments come into being, and mid-frequency treatment device is one of the most widely used therapeutic equipments.
Output amplitude and frequency are with its variation after mid-frequency treatment device is modulated low-frequency current using micro computer control technology
Intermediate frequency output electric current treats human body, eliminates the therapeutic effects such as human nerve fatigue, analgesia to reach.But it is existing in
Individual digital analog converter, the digital-to-analogue have been generally comprised for carrying out the middle frequency modulation circuit of electric current of intermediate frequency modulation in frequency therapeutic equipment
Converter is transported to current/voltage converter circuit after carrying out digital-to-analogue conversion to the signal that microcomputer chip exports, and enters back into
Power amplifier, electrical component is more in digital analog converter, current/voltage converter circuit, circuit is complicated, thus the hardware system of causing
Make problem at high cost, that circuit performance is unstable.
Utility model content
The purpose of this utility model is to provide a kind of IF Modulation modules, at high cost, electric to improve above-mentioned hardware manufacturing
Road performance instability problem.
The embodiments of the present invention are achieved in that
It includes processor unit, amplifier unit and switch unit, institute that the utility model, which provides a kind of IF Modulation module,
The processor that processor unit includes built-in D/A conversion unit is stated, the amplifier unit includes operational amplifier, the operation
The input terminal of amplifier is connected to the processor, and the switch unit includes analog switch, the analog switch respectively with institute
The output end connection of processor, the operational amplifier is stated, and the processor and the operational amplifier sent
Signal exports modulated medium frequency signal after being handled.
In the utility model optional embodiment, the processor is the microcontroller of STM8L151K6 model.
In the utility model optional embodiment, the operational amplifier is the dual operational amplifier of LM358 model.
In the utility model optional embodiment, the analog switch is the electronic analog swtich of SGM3157.
In the utility model optional embodiment, the third pin and the 6th pin of the dual operational amplifier with it is described
17th pin of microcontroller connects, and the first pin of the dual operational amplifier, second pin are opened with the electronic simulation
The the first pin connection closed, the third of the 5th pin of the dual operational amplifier, the 7th pin and the electronic analog swtich
Pin connection, the 4th pin, the 8th pin of the dual operational amplifier are connect with the second pin of the electronic analog swtich.
In the utility model optional embodiment, the amplifier unit further includes first resistor, first capacitor and second
Capacitor, the first end of the first resistor are connect with the 17th pin of the microcontroller, the other end of the first resistor
It is connect respectively with the third pin of the dual operational amplifier, the 6th pin, the first end of the first capacitor and double fortune
Calculate the 4th pin, the connection of -5V power supply of amplifier, the first end of the second end of the first capacitor and second capacitor and
The second pin of the electronic analog swtich connects, the second end of second capacitor respectively with the dual operational amplifier the
Eight pins, the connection of+5V power supply.
In the utility model optional embodiment, the 6th pin and the microcontroller of the electronic analog swtich
The connection of 11st pin, the 5th pin ground connection of the electronic analog swtich, the 4th pin output of the electronic analog swtich
The modulated medium frequency signal.
In the utility model optional embodiment, the switch unit further includes second resistance, 3rd resistor, the 4th electricity
Resistance, the 5th resistance and third capacitor, the first end of the second resistance are connect with the first pin of the dual operational amplifier, institute
The second end for stating second resistance is connect with the first pin of the electronic analog swtich, the first end of the 3rd resistor with it is described
7th pin of dual operational amplifier connects, and the third pin of the second end of the 3rd resistor and the electronic analog swtich connects
It connects, the first end of the 4th resistance is connect with the 11st pin of the microcontroller, the second end point of the 4th resistance
It is not connect with the 6th pin of the first end of the 5th resistance, the electronic analog swtich, the second end of the 5th resistance
Ground connection, the first end of the third capacitor connect with the 5th the pin ,+5V power supply of the electronic analog swtich respectively, and described the
The second end of three capacitors is grounded.
In the utility model optional embodiment, the IF Modulation module further includes processor power supply unit, described
Processor power supply unit includes voltage stabilizing chip, the 6th resistance and the 4th capacitor, the external 3.3V of the first pin of the voltage stabilizing chip
Power supply, the second pin of the voltage stabilizing chip are connect with the 32nd pin of the microcontroller, and the of the voltage stabilizing chip
Three pins ground connection, the 4th pin of the voltage stabilizing chip respectively with the first pin of the microcontroller, the 6th resistance
First end, the connection of the first end of the 4th capacitor, the second end of the 6th resistance are connect with 3.3V power supply, the 4th electricity
The second end of appearance is grounded.
In the utility model optional embodiment, the processor unit further includes the 5th capacitor, the 5th capacitor
First end connect respectively with the 8th pin, the 3.3V power supply of the microcontroller, the second end of the 5th capacitor with it is described
7th pin connect and ground of microcontroller.
The beneficial effect of the utility model embodiment is:
The utility model embodiment provides a kind of IF Modulation module, and the IF Modulation module is turned using built-in digital-to-analogue
The processor for changing unit avoids that digital analog converter is separately provided in external functional circuit, reduces the quantity of component, simplifies
Circuit package technique, to reduce the overall cost of the IF Modulation module, while component is less, external function is electric
Road connection more simply makes the circuit performance of the IF Modulation module more reliable and more stable.Wherein, by built in the processor
D/A conversion unit output analog signal can be voltage signal, require no current/voltage converter circuit and converted
It is transmitted to amplifier unit again afterwards, further reduces the quantity of component, simplify circuit package technique.IF Modulation mould simultaneously
Block controls the output of modulated medium frequency signal by analog switch, and the on/off by improving the modulated medium frequency signal is reacted
Sensitivity, to improve the treatment accuracy of institute's modulated medium frequency signal；On the other hand, the analog switch have it is low in energy consumption,
Advantage with long service life further reduced the maintenance cost of the IF Modulation module.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
By the way that shown in attached drawing, the above and other purpose, feature and advantage of the utility model will be more clear, all attached
Identical appended drawing reference indicates identical part in figure, does not deliberately draw attached drawing by actual size equal proportion scaling, with emphasis on
In the purport for showing the utility model.
Fig. 1 is a kind of module diagram for IF Modulation module that embodiment provides；
Fig. 2 is a kind of circuit diagram of amplifier unit provided by the embodiment of the utility model；
Fig. 3 is a kind of circuit diagram of switch unit provided by the embodiment of the utility model；
Fig. 4 is a kind of circuit diagram of processor power supply unit provided by the embodiment of the utility model；
Fig. 5 is a kind of circuit diagram of processor unit provided by the embodiment of the utility model.
Icon: 10- IF Modulation module；11- processor unit；12- amplifier unit；13- switch unit；14- processor
Power supply unit.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
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 a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and
The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention 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, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the range of the utility model protection.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that the orientation or positional relationship of the instructions such as term "inner", "outside"
For be based on the orientation or positional relationship shown in the drawings or the utility model product using when the orientation or position usually put
Relationship is merely for convenience of describing the present invention and simplifying the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.This
Outside, term " first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
In addition, the terms such as term "horizontal", "vertical" are not offered as requiring component abswolute level or pendency, but can be slightly
Low dip.It is not to indicate that the structure has been had to if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical"
It is complete horizontal, but can be slightly tilted.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set
Set ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
Other feature and advantage of the utility model will illustrate in subsequent specification, also, partly from specification
It becomes apparent, or is understood and implementing the utility model embodiment.The purpose of this utility model and other advantages can
It is achieved and obtained by structure specifically indicated in the written description, claims, and drawings.
Through the applicant the study found that existing mid-frequency treatment device, which is all made of modulation circuit of intermediate frequency, generates modulated medium frequency signal,
Therefore the Waveform generating circuit of the waveforms such as triangular wave, exponential wave, sine wave can be generated and modulation circuit of intermediate frequency is intermediate frequency therapy
Important Circuit in instrument, but currently used method is by microcomputer chip output digit signals, by additional digital-to-analogue conversion mould
Block is converted to modulated analog signal, then again through current/voltage converter circuit, finally send cause power amplifier, there are circuit compositions
The problem complicated, component is at high cost and circuit performance is unstable.To solve the above-mentioned problems, the utility model embodiment provides
A kind of IF Modulation module 10 applied to mid-frequency treatment device.
Referring to FIG. 1, Fig. 1 is a kind of module diagram for IF Modulation module that embodiment provides.
IF Modulation module 10 includes processor unit 11, amplifier unit 12 and switch unit 13, and processor unit 11 is logical
It crosses amplifier unit 12 to connect with switch unit 13, modulated medium frequency signal is exported by switch unit 13 outward.
Handled device unit 11 includes the processor of built-in D/A conversion unit, and the amplifier unit 12 includes operation amplifier
The input terminal of device, the operational amplifier is connected to the processor, and the switch unit 13 includes analog switch, the simulation
Switch is connect with the output end of the processor, the dual operational amplifier respectively, and to the processor and double fortune
It calculates after the signal that amplifier is sent is handled and exports modulated medium frequency signal.
Wherein, D/A conversion unit, that is, analog conversion function built in the processor in processor unit 11, the digital-to-analogue turn
Change the analog quantity that discrete digital quantity is exactly converted to connection variation.Optionally, the processor can be a kind of integrated electricity
Road chip, the processing capacity with signal.Above-mentioned processor can be general processor, including central processing unit (Central
Processing Unit, CPU), network processing unit (Network Processor, NP) etc.；It can also be Digital Signal Processing
Device (Digital Signal Processing, DSP), specific integrated circuit (Application Specific
Integrated Circuit, ASIC), ready-made programmable gate array (FieldProgrammable Gate Array, FPGA)
Either other programmable logic device, discrete gate or transistor logic, discrete hardware components.The general processor can
To be microprocessor or any conventional processor.Optionally, which can be the microcontroller of STM32 series, example
Such as STM32F103C8T6, STM32F103VET6 model can also be the models such as STM8L151K6.In the present embodiment with
For the microcontroller U1 of STM8L151K6 model.
Operational amplifier (referred to as " amplifier ") is the circuit unit with very high-amplification-factor, it is a kind of with special coupling
Close the amplifier of circuit and feedback, output signal can be input signal and add, subtract or the knot of the mathematical operations such as differential, integral
Fruit.For the operational amplifier in amplifier unit 12, optionally, the operational amplifier can be common OP07, LM353,
The operational amplifier of the models such as LM324.In the present embodiment with model LM353 or two LM358DR2G operational amplifier groups
At dual operational amplifier U2 for.
Analog switch is mainly the signal handoff functionality completed in signal link.It is realized using the on-off mode of metal-oxide-semiconductor
Signal link is turned off or is opened；It since it is functionally similar to switch, and is realized with the characteristic of analog device, referred to as simulation is opened
Close, have the characteristics that low in energy consumption, speed it is fast, without mechanical contact, small in size and long service life.Optionally, the simulation is opened
Close the analog switch that can be the models such as common TL182C, AD7510, AD7511, SGM3157.In the present embodiment with model
For the electronic analog swtich U3 of SGM3157.
Referring to FIG. 2, Fig. 2 is a kind of circuit diagram of amplifier unit provided by the embodiment of the utility model.
The third pin and the 6th pin of dual operational amplifier U2 is connect with the 17th pin of the microcontroller U1, institute
State the first pin of dual operational amplifier U2, second pin is connect with the first pin of the electronic analog swtich U3, described double
The 5th pin, the 7th pin of operational amplifier U2 is connect with the third pin of the electronic analog swtich U3, double operations
The 4th pin, the 8th pin of amplifier U2 is connect with the second pin of the electronic analog swtich U3.
Optionally, amplifier unit 12 further includes first resistor R1, first capacitor C1 and the second capacitor C2, the first resistor
The first end of R1 is connect with the 17th pin of the microcontroller U1, the other end of the first resistor R1 respectively with it is described double
Third pin, the connection of the 6th pin, the first end of the first capacitor C1 and the dual operational amplifier of operational amplifier U2
The 4th pin of U2, the connection of -5V power supply, the first end and institute of the second end of the first capacitor C1 and the second capacitor C2
State electronic analog swtich U3 second pin connection, the second end of the second capacitor C2 respectively with the dual operational amplifier U2
The 8th pin ,+5V power supply connection.
Referring to FIG. 3, Fig. 3 is a kind of circuit diagram of switch unit provided by the embodiment of the utility model.
The 6th pin of electronic analog swtich U3 is connect with the 11st pin of the microcontroller U1, the electronic simulation
The 5th pin of switch U3 is grounded, and the 4th pin of the electronic analog swtich U3 exports the modulated medium frequency signal.
Optionally, switch unit 13 further include second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5 and
Third capacitor C3, the first end of the second resistance R2 are connect with the first pin of the dual operational amplifier U2, and described second
The second end of resistance R2 is connect with the first pin of the electronic analog swtich U3, the first end of the 3rd resistor R3 with it is described
The 7th pin of dual operational amplifier U2 connects, the third of the second end of the 3rd resistor R3 and the electronic analog swtich U3
Pin connection, the first end of the 4th resistance R4 are connect with the 11st pin of the microcontroller U1, the 4th resistance
The second end of R4 is connect with the 6th pin of the first end of the 5th resistance R5, the electronic analog swtich U3 respectively, described
The second end of 5th resistance R5 is grounded, and the first end of the third capacitor C3 is drawn with the 5th of the electronic analog swtich U3 the respectively
Foot, the connection of+5V power supply, the second end ground connection of the third capacitor C3.
As an implementation, the IF Modulation module 10 in the present embodiment further includes processor power supply unit 14.
Referring to FIG. 4, Fig. 4 is a kind of circuit diagram of processor power supply unit provided by the embodiment of the utility model.
Processor power supply unit 14 includes voltage stabilizing chip U4, the 6th resistance R6 and the 4th capacitor C4, the voltage stabilizing chip U4
The external 3.3V power supply of the first pin, the 32nd pin of the second pin of the voltage stabilizing chip U4 and the microcontroller U1
Connection, the voltage stabilizing chip U4 third pin ground connection, the 4th pin of the voltage stabilizing chip U4 respectively with the microcontroller
The first pin of U1, the first end of the 6th resistance R6, the connection of the first end of the 4th capacitor C4, the 6th resistance R6
Second end connect with 3.3V power supply, the second end of the 4th capacitor C4 ground connection.
As an implementation, the processor unit 11 in the utility model embodiment further includes the 5th capacitor C5.
Referring to FIG. 5, Fig. 5 is a kind of circuit diagram of processor unit provided by the embodiment of the utility model.
Processor unit 11 further includes the 5th capacitor C5, the first end of the 5th capacitor C5 respectively with the microcontroller
The 8th pin of U1, the connection of 3.3V power supply, the second end of the 5th capacitor C5 and the 7th pin of the microcontroller U1 connect
It connects and is grounded.
In conclusion the utility model embodiment provides a kind of IF Modulation module, the IF Modulation module is used
The processor of built-in D/A conversion unit avoids that digital analog converter is separately provided in external functional circuit, reduces component
Quantity, circuit package technique is simplified, to reduce the overall cost of the IF Modulation module, while component is more
Less, external function circuit connection more simply makes the circuit performance of the IF Modulation module more reliable and more stable.Wherein, pass through institute
The analog signal for stating the D/A conversion unit output built in processor can be voltage signal, require no current/voltage-converted
Circuit is transmitted to amplifier unit after being converted again, further reduces the quantity of component, simplifies circuit package technique.Together
When IF Modulation module the output of modulated medium frequency signal is controlled by analog switch, pass through and improve the modulated medium frequency signal and connect
On/off opens reaction sensitivity, to improve the treatment accuracy of institute's modulated medium frequency signal；On the other hand, the analog switch
With advantage low in energy consumption, with long service life, the maintenance cost of the IF Modulation module further reduced.
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 IF Modulation module, it is applied to mid-frequency treatment device, which is characterized in that the IF Modulation module includes:
Processor unit, the processor including built-in D/A conversion unit；
The input terminal of amplifier unit, including operational amplifier, the operational amplifier is connected to the processor；
Switch unit, including analog switch, the analog switch output end with the processor, the operational amplifier respectively
Connection, and modulated medium frequency signal is exported after the signal sent to the processor and the operational amplifier is handled.
2. IF Modulation module according to claim 1, which is characterized in that the processor is STM8L151K6 model
Microcontroller.
3. IF Modulation module according to claim 2, which is characterized in that the operational amplifier is LM358 model
Dual operational amplifier.
4. IF Modulation module according to claim 3, which is characterized in that the analog switch is the electronics of SGM3157
Analog switch.
5. IF Modulation module according to claim 4, which is characterized in that the third pin of the dual operational amplifier and
6th pin is connect with the 17th pin of the microcontroller, the first pin of the dual operational amplifier, second pin with
First pin of the electronic analog swtich connects, the 5th pin, the 7th pin and the electronics of the dual operational amplifier
The third pin of analog switch connects, the 4th pin, the 8th pin and the electronic analog swtich of the dual operational amplifier
Second pin connection.
6. IF Modulation module according to claim 5, which is characterized in that the amplifier unit further include first resistor,
First capacitor and the second capacitor, the first end of the first resistor are connect with the 17th pin of the microcontroller, and described
The other end of one resistance is connect with the third pin of the dual operational amplifier, the 6th pin respectively, and the of the first capacitor
One end is connect with the 4th the pin, -5V power supply of the dual operational amplifier, the second end of the first capacitor and second electricity
The first end of appearance and the connection of the second pin of the electronic analog swtich, the second end of second capacitor respectively with it is described double
8th pin of operational amplifier, the connection of+5V power supply.
7. IF Modulation module according to claim 6, which is characterized in that the 6th pin of the electronic analog swtich with
11st pin of the microcontroller connects, the 5th pin ground connection of the electronic analog swtich, the electronic analog swtich
The 4th pin export the modulated medium frequency signal.
8. IF Modulation module according to claim 7, which is characterized in that the switch unit further include second resistance,
3rd resistor, the 4th resistance, the 5th resistance and third capacitor, the first end of the second resistance and the dual operational amplifier
The connection of first pin, the second end of the second resistance are connect with the first pin of the electronic analog swtich, the third electricity
The first end of resistance is connect with the 7th pin of the dual operational amplifier, the second end of the 3rd resistor and the electronic simulation
The third pin of switch connects, and the first end of the 4th resistance is connect with the 11st pin of the microcontroller, and described the
The second end of four resistance is connect with the 6th pin of the first end of the 5th resistance, the electronic analog swtich respectively, described
The second end of 5th resistance is grounded, the first end of the third capacitor respectively with the 5th the pin ,+5V of the electronic analog swtich
Power supply connection, the second end ground connection of the third capacitor.
9. IF Modulation module according to claim 2, which is characterized in that the IF Modulation module further includes processor
Power supply unit, the processor power supply unit include voltage stabilizing chip, the 6th resistance and the 4th capacitor, and the first of the voltage stabilizing chip
The external 3.3V power supply of pin, the second pin of the voltage stabilizing chip is connect with the 32nd pin of the microcontroller, described
The third pin of voltage stabilizing chip is grounded, the 4th pin of the voltage stabilizing chip respectively with the first pin of the microcontroller, institute
First end, the connection of the first end of the 4th capacitor of the 6th resistance are stated, the second end and 3.3V power supply of the 6th resistance connect
It connects, the second end ground connection of the 4th capacitor.
10. IF Modulation module according to claim 2, which is characterized in that the processor unit further includes the 5th electricity
Hold, the first end of the 5th capacitor is connect with the 8th pin, the 3.3V power supply of the microcontroller respectively, the 5th capacitor
Second end and the microcontroller the 7th pin connect and ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820936841.7U CN208283775U (en) | 2018-06-15 | 2018-06-15 | A kind of IF Modulation module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820936841.7U CN208283775U (en) | 2018-06-15 | 2018-06-15 | A kind of IF Modulation module |
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| CN208283775U true CN208283775U (en) | 2018-12-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114221542A (en) * | 2021-12-08 | 2022-03-22 | 广州砭石健康科技有限公司 | Constant current type modulation intermediate frequency physiotherapy instrument circuit and working principle thereof |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114221542A (en) * | 2021-12-08 | 2022-03-22 | 广州砭石健康科技有限公司 | Constant current type modulation intermediate frequency physiotherapy instrument circuit and working principle thereof |
| CN114221542B (en) * | 2021-12-08 | 2024-01-30 | 广州砭石健康科技有限公司 | Constant-current type modulation intermediate frequency physiotherapy instrument circuit and working principle thereof |
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