CN110325025A - A kind of system and method for reducing installation electromagnetical interference based on pulse modulated circuit - Google Patents
A kind of system and method for reducing installation electromagnetical interference based on pulse modulated circuit Download PDFInfo
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- CN110325025A CN110325025A CN201910524107.9A CN201910524107A CN110325025A CN 110325025 A CN110325025 A CN 110325025A CN 201910524107 A CN201910524107 A CN 201910524107A CN 110325025 A CN110325025 A CN 110325025A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0071—Active shielding
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Abstract
The system and method for reducing installation electromagnetical interference based on pulse modulated circuit that the invention discloses a kind of, which includes: heavy current installation, electromagnetic radiation monitoring device, pulse modulated circuit and linear motor；Heavy current installation generates electromagnetic radiation；Electromagnetic radiation monitoring device obtains the first amount of electromagnetic radiation for being monitored to the electromagnetic radiation that heavy current installation generates；First amount of electromagnetic radiation is compared with amount of radiation threshold value；Pulse modulated circuit, for being controlled linear motor by pulse modulated circuit when first amount of electromagnetic radiation is equal with amount of radiation threshold value.The present invention drives linear motor using the driving method of pulse-width modulation circuit, solves the problems, such as forceful electric power to the internal interference of light current.
Description
Technical field
The invention belongs to electromagnetic interference technical field more particularly to a kind of reduction installation electromagneticals based on pulse modulated circuit
The system and method for interference.
Background technique
Electromagnetic compatibility refers to that equipment or system meet the requirements operation not to any in its environment in its electromagnetic environment
Equipment generates the ability of intolerable electromagnetic interference.For the electromagnetic compatibility problem of complication system, it is always in engineering field
There is a problem to be solved, electromagnetic interference is generally radiated by space and by conducting wire conduction, and whens multiple electronic equipment mixed connections occurs
When electromagnetic interference, determine that interference source is complex, traditional mode is processing to be carried out to wire and cable, signal cable and to screen
It covers body leakage and carries out processing reduced radiation and conduction, but there are still need Curve guide impeller that could eliminate electromagnetic interference.
In the application of actual special equipment, electronic sand table is by display unit, main control unit (containing server unit), leads to
Interrogate unit (microphone array and phone), liftable manipulation unit (keyboard and mouse, linear motor and switch) and metal plate casing
Composition.The special equipment belongs to strong and weak electricity mixed connection equipment, and display unit and main control unit belong to heavy current installation (220V), liftable
Manipulation motor belongs to general device (220V turns 24V), and microphone array belongs to weak current equipment (3V).Wherein, when direct with switch
When controlling linear motor, microphone array operation can be caused to crash indirectly.
Interference inside electromagnetic compatibility specifically includes that working power generates leakage by the distribution capacity and insulation resistance of route
It is interfered caused by electricity；Signal by the impedance of ground wire, power supply and transfer wire be mutually coupled or conducting wire between mutual inductance caused by
Interference；Equipment or the certain element heatings of internal system, influence interference caused by the stability of element itself or other elements；Big function
The magnetic field of rate and high-voltage part generation, electric field caused by the other components of coupling influence by interfering.Traditional mode is to electricity
Line cable, signal cable carry out processing and carry out processing reduced radiation and conduction to shield leakage.
In general, filtering device can be used in wire and cable when handling the problem；Signal cable is using filter circuit, improvement
Shielding, it is strong and weak electrically separated；Shielding leakage is emphatically handled gap and hole.Traditional mode is to wire and cable, signal
Cable carries out processing and carries out processing reduced radiation and conduction to shield leakage, but is not up to expected to this special equipment
The effect of internal electromagnetic interference is eliminated, the instant drive current of switch is excessive, and switching process also will increase electromagnetic exposure, there are still
The case where needing Curve guide impeller that could eliminate electromagnetic interference, more stable driving motor.
Summary of the invention
Technology of the invention solves the problems, such as: overcoming the deficiencies of the prior art and provide a kind of drop based on pulse modulated circuit
The system and method for low installation electromagnetical interference, it is intended to pass through point of the special equipment interference of electromagnetic field of military-civil electromagnetism sand table class
Analysis, in the case where conventional method solves invalid, the scheme of emc issue when a kind of solution strong and weak electricity mixed connection is provided.
In order to solve the above-mentioned technical problem, the invention discloses a kind of, and the reduction installation electromagnetical based on pulse modulated circuit is dry
The system disturbed, comprising: heavy current installation, electromagnetic radiation monitoring device, pulse modulated circuit and linear motor；
Heavy current installation generates electromagnetic radiation；
Electromagnetic radiation monitoring device obtains the first electromagnetism spoke for being monitored to the electromagnetic radiation that heavy current installation generates
The amount of penetrating；First amount of electromagnetic radiation is compared with amount of radiation threshold value；
Pulse modulated circuit, for passing through impulse modulation when first amount of electromagnetic radiation is equal with amount of radiation threshold value
Circuit controls linear motor；And real-time monitoring obtains the second amount of electromagnetic radiation of linear motor generation, obtains the first electricity
Magnetic radiation amount is superimposed amount of electromagnetic radiation with the second amount of electromagnetic radiation, carries out linear motor according to the superposition amount of electromagnetic radiation and turns
The adjusting of speed；When the superposition amount of electromagnetic radiation increases, speed of linear motor is turned down by pulse modulated circuit, is superimposed electromagnetism
Amount of radiation decline, the amount of electromagnetic radiation that this closed loop feedback adjusts holding system is less than amount of radiation threshold, to guarantee microphone array just
It is often used.
In the above-mentioned system for reducing installation electromagnetical interference based on pulse modulated circuit, further includes: switchgear；
Switchgear, for when first amount of electromagnetic radiation is less than amount of radiation threshold value and the first amount of electromagnetic radiation and spoke
When the difference of the amount of penetrating threshold value meets difference standard, linear motor is directly controlled by switchgear.
In the above-mentioned system for reducing installation electromagnetical interference based on pulse modulated circuit, pulse modulated circuit, comprising: two
Pole pipe VD1, diode VD2, diode VD3, diode VD4, diode D1, diode D2, diode D3, diode D4, three
Pole pipe T1, triode T2, triode T3, triode T4, inverter circuit switch S, capacitor C, resistance R1 and resistance R2；
Diode VD1, diode VD2, diode VD3 and diode VD4, in parallel reversed, the clipping for input signal
Pressure stabilizing；
Diode D1, diode D2, diode D3 and diode D4, in parallel reversed, the clipping pressure stabilizing for output signal；
Inverter circuit switch S is controlled for connecting and disconnecting of the circuit, and output end is made to obtain a series of equal pulse of amplitudes, and driving is straight
Line motor M operating；
Capacitor C is used to adjust the forward and reverse charging of pulse modulated circuit；
Resistance R1 and resistance R2 is used to adjust the electric current of pulse modulated circuit；
Triode T1, triode T2, triode T3 and triode T4 under the action of diode and inverter circuit switch S,
Export modulated pulse signal.
In the above-mentioned system for reducing installation electromagnetical interference based on pulse modulated circuit, pulse modulated circuit is used for:
To the base stage input sine wave of triode T1, triode T2, triode T3 and triode T4；
Between signal positive half period, triode T1 is held on, and triode T4 replaces on-off；Wherein: as triode T1 and
When triode T4 is connected, the load voltage U that is added on linear motorMEqual to input voltage amplitude U；When triode T1 conducting and three
When pole pipe T4 is turned off, since the load current being added on linear motor cannot be mutated, load current will pass through diode VD2 and two
Pole pipe VD3 afterflow, then UM=0；Wherein, if load current is greater than setting electric current threshold value, until triode T4 is connected again
Before, diode VD3 is always maintained at conducting；If load current rapid decay is to zero, before triode T4 is connected again,
UMIt is always zero；In turn, the load voltage U on linear motorMThe available alternate two kinds of level of 0 and U；
Between signal negative half-cycle, triode T2 is held on, and triode T3 replaces on-off；Wherein: as triode T2 and
When triode T3 is connected, the load voltage U that is added on linear motorMEqual to-U；When triode T2 conducting, triode T3 is turned off
When, since the load current being added on linear motor cannot be mutated, load current passes through diode VD1 and diode VD4 afterflow,
Then UM=0；In turn, the load voltage U on linear motorMThe available alternate two kinds of level of-U and 0；
Within a signal period, the PWM wave of pulse modulated circuit output is made of U ,-U and 0 three kinds of level, passes through arteries and veins
The operating of the PWM wave control linear motor of modulated circuit output, reduces and closes the switch the electromagnetism spoke that the high current of moment generates
It penetrates.
In the above-mentioned system for reducing installation electromagnetical interference based on pulse modulated circuit, heavy current installation, comprising: display is single
Member and main control unit.
In the above-mentioned system for reducing installation electromagnetical interference based on pulse modulated circuit, amount of radiation threshold value are as follows: cause wheat
The amount of electromagnetic radiation that gram wind array crashes.
The method for reducing installation electromagnetical interference based on pulse modulated circuit that the invention also discloses a kind of, comprising:
The electromagnetic radiation generated to heavy current installation is monitored, and obtains the first amount of electromagnetic radiation；
First amount of electromagnetic radiation is compared with amount of radiation threshold value；
When first amount of electromagnetic radiation is equal with amount of radiation threshold value, linear motor is carried out by pulse modulated circuit
Control；And real-time monitoring obtains the second amount of electromagnetic radiation of linear motor generation, obtains the first amount of electromagnetic radiation and the second electromagnetism
The superposition amount of electromagnetic radiation of amount of radiation carries out the adjusting of speed of linear motor according to the superposition amount of electromagnetic radiation；When described folded
When amount of electromagnetic radiation being added to increase, speed of linear motor, superposition amount of electromagnetic radiation decline, this closed loop are turned down by pulse modulated circuit
Feedback regulation keeps the amount of electromagnetic radiation of system to be less than amount of radiation threshold, to guarantee microphone array normal use.
The invention has the following advantages that
A kind of system and method for reducing installation electromagnetical interference based on pulse modulated circuit of disclosure of the invention, utilize pulsewidth
The driving method of modulation circuit drives linear motor, solves the problems, such as forceful electric power to the internal interference of light current.
Detailed description of the invention
Fig. 1 is a kind of structure of the system for reducing installation electromagnetical interference based on pulse modulated circuit in the embodiment of the present invention
Block diagram；
Fig. 2 is a kind of electrical block diagram of pulse modulated circuit in the embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to disclosed by the invention
Embodiment is described in further detail.
As Fig. 1 in the present embodiment should be based on the system for reducing installation electromagnetical interference of pulse modulated circuit, comprising: strong
Electric equipment 101, electromagnetic radiation monitoring device 102, pulse modulated circuit 103 and linear motor 104.Wherein:
Heavy current installation 101, for generating electromagnetic radiation.
In the present embodiment, heavy current installation includes but are not limited to: display unit and main control unit.Linear motor is general
(light current) equipment.
Electromagnetic radiation monitoring device 102 obtains the first electromagnetism for being monitored to the electromagnetic radiation that heavy current installation generates
Amount of radiation；First amount of electromagnetic radiation is compared with amount of radiation threshold value.
In the present embodiment, amount of radiation threshold value refers to: the amount of electromagnetic radiation for causing microphone array to crash.
When the first amount of electromagnetic radiation is much smaller than amount of radiation threshold value, switchgear 105 can be used and directly control linear motor.
Wherein, the first amount of electromagnetic radiation refers to much smaller than amount of radiation threshold value: the electromagnetic radiation that heavy current installation generates is compared to amount of radiation threshold
Value almost can be ignored.
When first amount of electromagnetic radiation (or approach is equal) equal with amount of radiation threshold value, pulse modulated circuit is executed
103, linear motor 104 is controlled.
Pulse modulated circuit 103, for being controlled by pulse modulated circuit linear motor 104；And real-time monitoring
The second amount of electromagnetic radiation of linear motor generation is obtained, obtain the first amount of electromagnetic radiation and the second amount of electromagnetic radiation is superimposed electromagnetism
Amount of radiation carries out the adjusting of speed of linear motor according to the superposition amount of electromagnetic radiation；When the superposition amount of electromagnetic radiation increases
When, speed of linear motor, superposition amount of electromagnetic radiation decline are turned down by pulse modulated circuit, this closed loop feedback adjusts holding system
Amount of electromagnetic radiation be less than amount of radiation threshold, to guarantee microphone array normal use.
In the present embodiment, such as Fig. 2, which be can specifically include: diode VD1, diode VD2, two
Pole pipe VD3, diode VD4, diode D1, diode D2, diode D3, diode D4, triode T1, triode T2, three poles
Pipe T3, triode T4, inverter circuit switch S, capacitor C, resistance R1 and resistance R2.Wherein, diode VD1, diode VD2, two
Pole pipe VD3 and diode VD4, in parallel reversed, the clipping pressure stabilizing for input signal；Diode D1, diode D2, diode D3
It is in parallel reversed with diode D4, the clipping pressure stabilizing for output signal；Inverter circuit switch S is controlled for connecting and disconnecting of the circuit, is made defeated
Outlet obtains a series of equal pulse of amplitudes, driving linear motor M operating；Capacitor C is for adjusting pulse modulated circuit just
Reverse charging；Resistance R1 and resistance R2 is used to adjust the electric current of pulse modulated circuit；Triode T1, triode T2, triode T3
With triode T4 under the action of diode and inverter circuit switch S, modulated pulse signal is exported.
The specific working principle is as follows:
To the base stage input sine wave of triode T1, triode T2, triode T3 and triode T4.
Between signal positive half period, triode T1 is held on, and triode T4 replaces on-off；Wherein: as triode T1 and
When triode T4 is connected, the load voltage U that is added on linear motorMEqual to input voltage amplitude U；When triode T1 conducting and three
When pole pipe T4 is turned off, since the load current being added on linear motor cannot be mutated, load current will pass through diode VD2 and two
Pole pipe VD3 afterflow, then UM=0；Wherein, if load current is greater than setting electric current threshold value (that is, when load current is larger), until
Before triode T4 is connected again, diode VD3 is always maintained at conducting；If load current rapid decay is to zero, in three poles
Before pipe T4 is connected again, UMIt is always zero；In turn, the load voltage U on linear motorMAvailable alternate two kinds of 0 and U
Level.
Between signal negative half-cycle, triode T2 is held on, and triode T3 replaces on-off；Wherein: as triode T2 and
When triode T3 is connected, the load voltage U that is added on linear motorMEqual to-U；When triode T2 conducting, triode T3 is turned off
When, since the load current being added on linear motor cannot be mutated, load current passes through diode VD1 and diode VD4 afterflow,
Then UM=0；In turn, the load voltage U on linear motorMThe available alternate two kinds of level of-U and 0.
Within a signal period, the PWM wave of pulse modulated circuit output is made of U ,-U and 0 three kinds of level, passes through arteries and veins
The operating of the PWM wave control linear motor of modulated circuit output, reduces and closes the switch the electromagnetism spoke that the high current of moment generates
It penetrates.
Wherein, it should be noted that in power component devices switch, circuit can generate harmonic current, while high frequency
At branch to space radiate, the element used to reach electromagnetic compatibility be usually using reduction alternate path impedance method come
Reduce noise voltage or increases current path impedance to reduce noise current.It is existing that all elements and interconnection line can all generate resonance
As, therefore in element selection, to fully ensure that the Low ESR distribution of route.Secondly, the useless end of control chip will pass through phase
The build-out resistor answered connects and is grounded or connects power end on power supply or ground connection integrated circuit and will connect, should not be hanging；Each integrated circuit
A decoupling capacitor need to be matched；Ground connection can reduce power module noise, reduces crosstalk and prevent the accumulation of electrostatic；Interface circuit adds
Filtering processing etc..
Linear motor 104, for carrying out rotational speed regulation under the control of pulse modulated circuit 103.
It in the preferred embodiment of the present invention, should be based on the system that the reduction installation electromagnetical of pulse modulated circuit interferes also
May include:
Switchgear 105, for when first amount of electromagnetic radiation be less than amount of radiation threshold value and the first amount of electromagnetic radiation with
When the difference of amount of radiation threshold value meets difference standard, linear motor is directly controlled by switchgear.
The system material object of reduction installation electromagnetical interference of the present invention based on pulse modulated circuit turns to Modular electrical
Road plate can be used as a part of electronic sand table hardware.
Correspondingly, in embodiments of the present invention, it is dry to also disclose a kind of reduction installation electromagnetical based on pulse modulated circuit
The method disturbed, comprising: the electromagnetic radiation generated to heavy current installation is monitored, and obtains the first amount of electromagnetic radiation；By the first electromagnetism
Amount of radiation is compared with amount of radiation threshold value；When first amount of electromagnetic radiation is equal with amount of radiation threshold value, pass through pulse tune
Circuit processed controls linear motor；And real-time monitoring obtains the second amount of electromagnetic radiation of linear motor generation, obtains first
Amount of electromagnetic radiation is superimposed amount of electromagnetic radiation with the second amount of electromagnetic radiation, carries out linear motor according to the superposition amount of electromagnetic radiation
The adjusting of revolving speed；When the superposition amount of electromagnetic radiation increases, speed of linear motor, superposition electricity are turned down by pulse modulated circuit
The decline of magnetic radiation amount, the amount of electromagnetic radiation that this closed loop feedback adjusts holding system is less than amount of radiation threshold, to guarantee microphone array
Normal use.
For embodiment of the method, since it is corresponding with system embodiment, so be described relatively simple, correlation
Place referring to system embodiment part explanation.
Various embodiments are described in a progressive manner in this explanation, the highlights of each of the examples are with its
The difference of his embodiment, the same or similar parts between the embodiments can be referred to each other.
The above, optimal specific embodiment only of the invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.
The content that description in the present invention is not described in detail belongs to the well-known technique of professional and technical personnel in the field.
Claims (7)
1. a kind of system for reducing installation electromagnetical interference based on pulse modulated circuit characterized by comprising heavy current installation,
Electromagnetic radiation monitoring device, pulse modulated circuit and linear motor；
Heavy current installation generates electromagnetic radiation；
Electromagnetic radiation monitoring device obtains the first amount of electromagnetic radiation for being monitored to the electromagnetic radiation that heavy current installation generates；
First amount of electromagnetic radiation is compared with amount of radiation threshold value；
Pulse modulated circuit, for passing through pulse modulated circuit when first amount of electromagnetic radiation is equal with amount of radiation threshold value
Linear motor is controlled；And real-time monitoring obtains the second amount of electromagnetic radiation of linear motor generation, obtains the first electromagnetism spoke
The amount of penetrating is superimposed amount of electromagnetic radiation with the second amount of electromagnetic radiation, carries out speed of linear motor according to the superposition amount of electromagnetic radiation
It adjusts；When the superposition amount of electromagnetic radiation increases, speed of linear motor is turned down by pulse modulated circuit, is superimposed electromagnetic radiation
Amount decline, the amount of electromagnetic radiation that this closed loop feedback adjusts holding system are less than amount of radiation threshold, are made with guaranteeing microphone array normally
With.
2. the system according to claim 1 that reduce installation electromagnetical interference based on pulse modulated circuit, which is characterized in that
Further include: switchgear；
Switchgear, for when first amount of electromagnetic radiation is less than amount of radiation threshold value and the first amount of electromagnetic radiation and amount of radiation
When the difference of threshold value meets difference standard, linear motor is directly controlled by switchgear.
3. the system according to claim 1 that reduce installation electromagnetical interference based on pulse modulated circuit, which is characterized in that
Pulse modulated circuit, comprising: diode VD1, diode VD2, diode VD3, diode VD4, diode D1, diode D2,
Diode D3, diode D4, triode T1, triode T2, triode T3, triode T4, inverter circuit switch S, capacitor C, electricity
Hinder R1 and resistance R2；
Diode VD1, diode VD2, diode VD3 and diode VD4, in parallel reversed, the clipping pressure stabilizing for input signal；
Diode D1, diode D2, diode D3 and diode D4, in parallel reversed, the clipping pressure stabilizing for output signal；
Inverter circuit switch S is controlled for connecting and disconnecting of the circuit, and output end is made to obtain a series of equal pulse of amplitudes, drives straight-line electric
Machine M operating；
Capacitor C is used to adjust the forward and reverse charging of pulse modulated circuit；
Resistance R1 and resistance R2 is used to adjust the electric current of pulse modulated circuit；
Triode T1, triode T2, triode T3 and triode T4 are under the action of diode and inverter circuit switch S, output
Modulated pulse signal.
4. the system according to claim 3 that reduce installation electromagnetical interference based on pulse modulated circuit, which is characterized in that
Pulse modulated circuit is used for:
To the base stage input sine wave of triode T1, triode T2, triode T3 and triode T4；
Between signal positive half period, triode T1 is held on, and triode T4 replaces on-off；Wherein: as triode T1 and three poles
When pipe T4 is connected, the load voltage U that is added on linear motorMEqual to input voltage amplitude U；When triode T1 is connected and triode
When T4 is turned off, since the load current being added on linear motor cannot be mutated, load current will pass through diode VD2 and diode
VD3 afterflow, then UM=0；Wherein, if load current is greater than setting electric current threshold value, until before triode T4 is connected again,
Diode VD3 is always maintained at conducting；If load current rapid decay is to zero, before triode T4 is connected again, UMOne
It is directly zero；In turn, the load voltage U on linear motorMThe available alternate two kinds of level of 0 and U；
Between signal negative half-cycle, triode T2 is held on, and triode T3 replaces on-off；Wherein: as triode T2 and three poles
When pipe T3 is connected, the load voltage U that is added on linear motorMEqual to-U；When triode T2 is connected and triode T3 is turned off, by
It cannot be mutated in the load current being added on linear motor, load current passes through diode VD1 and diode VD4 afterflow, then UM
=0；In turn, the load voltage U on linear motorMThe available alternate two kinds of level of-U and 0；
Within a signal period, the PWM wave of pulse modulated circuit output is made of U ,-U and 0 three kinds of level, passes through pulse tune
The operating of the PWM wave control linear motor of circuit output processed, reduces and closes the switch the electromagnetic radiation that the high current of moment generates.
5. the method according to claim 1 that reduce installation electromagnetical interference based on pulse modulated circuit, which is characterized in that
Heavy current installation, comprising: display unit and main control unit.
6. the method according to claim 1 that reduce installation electromagnetical interference based on pulse modulated circuit, which is characterized in that
Amount of radiation threshold value are as follows: the amount of electromagnetic radiation for causing microphone array to crash.
7. a kind of method for reducing installation electromagnetical interference based on pulse modulated circuit characterized by comprising
The electromagnetic radiation generated to heavy current installation is monitored, and obtains the first amount of electromagnetic radiation；
First amount of electromagnetic radiation is compared with amount of radiation threshold value；
When first amount of electromagnetic radiation is equal with amount of radiation threshold value, linear motor is controlled by pulse modulated circuit
System；And real-time monitoring obtains the second amount of electromagnetic radiation of linear motor generation, obtains the first amount of electromagnetic radiation and the second electromagnetism spoke
The superposition amount of electromagnetic radiation for the amount of penetrating carries out the adjusting of speed of linear motor according to the superposition amount of electromagnetic radiation；When the superposition
When amount of electromagnetic radiation increases, speed of linear motor is turned down by pulse modulated circuit, superposition amount of electromagnetic radiation declines, this closed loop is anti-
The amount of electromagnetic radiation that feedback adjusts holding system is less than amount of radiation threshold, to guarantee microphone array normal use.
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| CN201910524107.9A CN110325025B (en) | 2019-06-18 | 2019-06-18 | System and method for reducing electromagnetic interference of equipment based on pulse modulation circuit |
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| CN201910524107.9A CN110325025B (en) | 2019-06-18 | 2019-06-18 | System and method for reducing electromagnetic interference of equipment based on pulse modulation circuit |
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| CN110325025A true CN110325025A (en) | 2019-10-11 |
| CN110325025B CN110325025B (en) | 2021-03-26 |
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ID=68119698
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112611927A (en) * | 2020-11-27 | 2021-04-06 | 苏州浪潮智能科技有限公司 | Electromagnetic radiation adjusting device and method and electronic equipment |
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| US5382915A (en) * | 1993-07-06 | 1995-01-17 | Motorola, Inc. | Pulsewidth-modulated amplifier having analog mode |
| CN201528323U (en) * | 2009-05-03 | 2010-07-14 | 南京微盟电子有限公司 | EMI improvement circuit based on spread spectrum conversion technology |
| CN102170222A (en) * | 2010-09-30 | 2011-08-31 | 四川虹欧显示器件有限公司 | Suppression device for electromagnetic interferences to switching power supply |
| CN103529328A (en) * | 2013-10-22 | 2014-01-22 | 重庆长安汽车股份有限公司 | Device and method for testing electromagnetic interference |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5382915A (en) * | 1993-07-06 | 1995-01-17 | Motorola, Inc. | Pulsewidth-modulated amplifier having analog mode |
| CN201528323U (en) * | 2009-05-03 | 2010-07-14 | 南京微盟电子有限公司 | EMI improvement circuit based on spread spectrum conversion technology |
| CN102170222A (en) * | 2010-09-30 | 2011-08-31 | 四川虹欧显示器件有限公司 | Suppression device for electromagnetic interferences to switching power supply |
| CN103529328A (en) * | 2013-10-22 | 2014-01-22 | 重庆长安汽车股份有限公司 | Device and method for testing electromagnetic interference |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112611927A (en) * | 2020-11-27 | 2021-04-06 | 苏州浪潮智能科技有限公司 | Electromagnetic radiation adjusting device and method and electronic equipment |
| CN112611927B (en) * | 2020-11-27 | 2022-12-02 | 苏州浪潮智能科技有限公司 | Electromagnetic radiation adjusting device and method and electronic equipment |
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| CN110325025B (en) | 2021-03-26 |
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