CN109683677B - Method and device for reducing radiation interference of I.MX6 chip - Google Patents
Method and device for reducing radiation interference of I.MX6 chip Download PDFInfo
- Publication number
- CN109683677B CN109683677B CN201811575216.5A CN201811575216A CN109683677B CN 109683677 B CN109683677 B CN 109683677B CN 201811575216 A CN201811575216 A CN 201811575216A CN 109683677 B CN109683677 B CN 109683677B
- Authority
- CN
- China
- Prior art keywords
- clock signal
- frequency
- chip
- spread
- phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/18—Packaging or power distribution
- G06F1/181—Enclosures
- G06F1/182—Enclosures with special features, e.g. for use in industrial environments; grounding or shielding against radio frequency interference [RFI] or electromagnetical interference [EMI]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/04—Generating or distributing clock signals or signals derived directly therefrom
- G06F1/08—Clock generators with changeable or programmable clock frequency
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/08—Details of the phase-locked loop
- H03L7/0805—Details of the phase-locked loop the loop being adapted to provide an additional control signal for use outside the loop
Abstract
The invention provides a method for reducing radiation interference of an I.MX6 chip, which comprises the following steps: closing a phase-locked loop clock signal; switching the work of a phase-locked loop clock signal as a system clock of an I.MX6 chip to an oscillation clock signal as the system clock of the I.MX6 chip; starting a spread spectrum function of a clock signal of a phase-locked loop; setting the bandwidth of the spread phase-locked loop clock signal to repeatedly perform frequency reduction and frequency increase in a first bandwidth range, wherein the single frequency reduction and frequency increase of the spread phase-locked loop clock signal are performed at a first time length threshold; the oscillation clock signal is used as the system clock of the I.MX6 chip to work and is switched back to the phase-locked loop clock signal after frequency spreading to be used as the system clock of the I.MX6 chip, so that the radiation interference in the second frequency width range is reduced through the frequency multiplication effect. The invention can effectively reduce the radiation interference of the I.MX6 chip generated in the second frequency width range through the spread spectrum function and the frequency multiplication effect.
Description
Technical Field
The invention relates to the technical field of vehicle-mounted communication, in particular to a method and a device for reducing radiation interference of an I.MX6 chip.
Background
The I.MX6 chip is one of the mainstream CPU chips of the current vehicle navigation product, the frequency of the clock signal of the default phase-locked loop is fixed 528MHZ, and the radiation test exceeds the standard due to the fixed and unchanged frequency. For example, the navigation machine radiation value is too high, which may cause interference to other electronic devices in the car, for example, interference to the mobile phone signal, resulting in a poor signal, etc.
Disclosure of Invention
In view of the above problems, the present invention provides a method and an apparatus for reducing the radiation interference of an i.mx6 chip, which can solve the problem of the radiation exceeding of the i.mx6 chip by the spread spectrum function and the frequency doubling effect.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a method for radiated interference of an i.mx6 chip, the method comprising:
closing the phase-locked loop clock signal;
switching the phase-locked loop clock signal as a system clock of the I.MX6 chip to an oscillation clock signal as the system clock of the I.MX6 chip;
starting a spread spectrum function of the clock signal of the phase-locked loop;
setting the bandwidth of the spread phase-locked loop clock signal to repeatedly perform frequency reduction and frequency increase in a first bandwidth range, wherein the single frequency reduction and frequency increase of the spread phase-locked loop clock signal are performed at a first time length threshold;
and switching the oscillation clock signal as the system clock of the I.MX6 chip to the phase-locked loop clock signal after the spread spectrum as the system clock of the I.MX6 chip to reduce the radiation interference in a second bandwidth range by a frequency multiplication effect.
As an optional implementation manner, the first bandwidth range is 516MHZ to 528MHZ, the first time threshold is 500ms, when the spread pll clock signal is used as the system clock of the i.mx6 chip to perform frequency up-conversion, the frequency of the spread pll clock signal is increased from 516MHZ to 528MHZ at a preset step frequency, and when the spread pll clock signal is used as the system clock of the i.mx6 chip to perform frequency down-conversion, the frequency of the spread pll clock signal is decreased from 528MHZ to 516MHZ at the preset step frequency.
As an alternative embodiment, the predetermined step frequency is 60 KHZ.
In an alternative embodiment, the second bandwidth range is 800MHz to 900 MHz.
In a second aspect, the present invention provides an apparatus for reducing radiation interference of an i.mx6 chip, the apparatus comprising a signal conversion module and a spreading module, wherein the signal conversion module is electrically connected to the spreading module;
the signal conversion module closes the phase-locked loop clock signal;
the signal conversion module switches the phase-locked loop clock signal to be used as a system clock of the I.MX6 chip to be switched to be used as an oscillation clock signal to be used as the system clock of the I.MX6 chip to work;
the spread spectrum module starts the spread spectrum function of the clock signal of the phase-locked loop;
the spread spectrum module sets the bandwidth of the spread phase-locked loop clock signal to repeatedly perform frequency reduction and frequency increase in a first bandwidth range, wherein the single frequency reduction and frequency increase of the spread phase-locked loop clock signal are performed at a first time length threshold;
the signal conversion module switches the oscillation clock signal as the system clock of the I.MX6 chip to the phase-locked loop clock signal after the spread spectrum as the system clock of the I.MX6 chip so as to reduce the radiation interference in a second bandwidth range through a frequency multiplication effect.
As an optional implementation manner, the first bandwidth range is 516MHZ to 528MHZ, the first time threshold is 500ms, when the spread pll clock signal is used as the system clock of the i.mx6 chip to perform frequency up-conversion, the frequency of the spread pll clock signal is increased from 516MHZ to 528MHZ at a preset step frequency, and when the spread pll clock signal is used as the system clock of the i.mx6 chip to perform frequency down-conversion, the frequency of the spread pll clock signal is decreased from 528MHZ to 516MHZ at the preset step frequency.
As an alternative embodiment, the predetermined step frequency is 60 KHZ.
In an alternative embodiment, the second bandwidth range is 800MHz to 900 MHz.
According to yet another embodiment of the present invention, there is provided a computer terminal comprising a memory for storing a computer program and a processor for executing the computer program to cause the computer terminal to perform the method for reducing radiated interference of an i.mx6 chip according to the above.
According to still another embodiment of the present invention, there is provided a computer-readable storage medium storing the computer program used in the computer terminal described above.
According to the method for reducing the radiation interference of the I.MX6 chip, provided by the invention, the anti-interference method comprises the following steps: closing a phase-locked loop clock signal; switching the work of a phase-locked loop clock signal as a system clock of an I.MX6 chip to an oscillation clock signal as the system clock of the I.MX6 chip; starting a spread spectrum function of a clock signal of a phase-locked loop; setting the bandwidth of the spread phase-locked loop clock signal to repeatedly perform frequency reduction and frequency increase in a first bandwidth range, wherein the single frequency reduction and frequency increase of the spread phase-locked loop clock signal are performed at a first time length threshold; the oscillation clock signal is used as the system clock of the I.MX6 chip to work and is switched back to the phase-locked loop clock signal after frequency spreading to be used as the system clock of the I.MX6 chip, so that the radiation interference in the second frequency width range is reduced through the frequency multiplication effect. The invention can effectively reduce the radiation interference of the I.MX6 chip generated in the second frequency width range through the spread spectrum function and the frequency multiplication effect. In addition, the spread spectrum range of 516MHZ to 528MHZ is 12MHZ, and the interference generated by the clock signal of the phase-locked loop at 800MHZ to 900MHZ can be reduced through the frequency multiplication effect.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of the present invention.
Fig. 1 is a flowchart of a method for reducing radiation interference of an i.mx6 chip according to embodiment 1 of the present invention;
fig. 1a shows the test results of radiation intensity before and after spreading for the method of reducing radiation interference of i.mx6 chips provided in embodiment 1 of the present invention;
fig. 2 is a block diagram of an apparatus for reducing radiation interference of an i.mx6 chip according to embodiment 2 of the present invention.
Description of the main element symbols:
200-a device for reducing the radiation interference of the I.MX6 chip;
210-a signal transformation module;
220-spreading module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Hereinafter, the terms "including", "having", and their derivatives, which may be used in various embodiments of the present invention, are only intended to indicate specific features, numbers, steps, operations, elements, components, or combinations of the foregoing, and should not be construed as first excluding the existence of, or adding to, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
In various embodiments of the invention, the expression "a or/and B" includes any or all combinations of the words listed simultaneously, which may include a, may include B, or may include both a and B.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Example 1
Referring to fig. 1, fig. 1 is a flowchart of a method for reducing radiation interference of an i.mx6 chip according to embodiment 1 of the present invention (hereinafter referred to as "method"). The MX6 chip is suitable for a phase-locked loop clock signal to work as a system clock. The method comprises the following steps:
and S101, closing a phase-locked loop clock signal.
EMC testing, which may be referred to as Electro-Magnetic Compatibility (EMC), refers to a comprehensive assessment of the electromagnetic disturbance capability (EMI) and electromagnetic disturbance rejection capability (EMS) of an electronic product, which is one of the most important indicators of product quality, for example, EMC testing consists of a test site and a test instrument, EMI testing includes radiated disturbance testing (RE), Conducted disturbance testing (CE), Harmonic current disturbance testing (Harmonic), and Voltage change and Flicker testing (Flicker testing), including electrostatic disturbance rejection testing (ESD), radio frequency electromagnetic field radiated disturbance rejection testing (RS), radio frequency field induced Conducted disturbance rejection testing (CS), short-time interruption and Voltage change disturbance rejection testing (DIP), disturbance rejection testing (PHE), electrical transient rapid pulse disturbance rejection testing (SUS), and Harmonic disturbance rejection testing (VDSL). The EMI testing requires that a clock signal (VDSL-S) be shut down in place of an EMI signal generated by an EMI-frequency Interference testing (VDSL-S) of an electronic product, a VDS-S-frequency Interference rejection testing (VDSL-S), a VDS-frequency Interference rejection testing (VDS), a Harmonic current rejection testing (S), a Harmonic disturbance rejection testing (S), a short-frequency Interference rejection testing (VDS), a VDS-frequency rejection testing (RS), a VDS-frequency rejection testing (S), a VDS-frequency rejection testing (S) and a VDS) of an MH < 19-frequency rejection testing (S) of an EMI testing (S < 19).
And S103, switching the phase-locked loop clock signal as the system clock of the I.MX6 chip to an oscillation clock signal as the system clock of the I.MX6 chip.
After the PLL clock signal is turned off, the PLL clock signal is switched from operating as the system clock of the I.MX6 chip to operating as the system clock of the I.MX6 chip (OSC _ C L K). in one embodiment, the frequency of the oscillating clock signal is 24KHZ, the oscillating clock signal temporarily replaces the system clock of the I.MX6 chip to operate, and the PLL clock signal can be spread in a time range in which the oscillating clock signal temporarily replaces the system clock of the I.MX6 chip to operate.
And S105, starting a frequency spreading function of the phase-locked loop clock signal.
In one embodiment, after a specific frequency band for the pll clock signal is turned on and selected, the specific frequency band is spread.
S107, setting the bandwidth of the spread PLL clock signal to repeatedly perform frequency reduction and frequency increase within a first bandwidth range, wherein the single frequency reduction and frequency increase of the spread PLL clock signal are performed at a first time threshold.
In one embodiment, the first bandwidth range is 516MHZ to 528MHZ, and the first duration threshold is 500 ms. When the spread-spectrum phase-locked loop clock signal is used as a system clock of an I.MX6 chip to be subjected to frequency boosting, the frequency of the spread-spectrum phase-locked loop clock signal is increased from 516MHZ to 528MHZ by a preset step frequency. When the spread-spectrum phase-locked loop clock signal is used as a system clock of the I.MX6 chip to perform frequency reduction, the frequency of the spread-spectrum phase-locked loop clock signal is reduced from 528MHZ to 516MHZ at a preset step frequency. In other words, the frequency of the spread pll clock signal is repeatedly decreased and increased between 516MHZ and 528MHZ, and the interference generated in the high band interval is reduced by the frequency multiplication effect. For example, the predetermined step frequency is 60KHZ, the frequency of the spread pll clock signal gradually increases from 516MHZ to 528MHZ at a rate of 60KHZ, or the frequency of the spread pll clock signal gradually decreases from 528MHZ to 516MHZ at a rate of 60KHZ, wherein the interference generated in the high band interval is reduced by repeatedly performing down-conversion and up-conversion.
And S109, switching the oscillation clock signal as the system clock of the I.MX6 chip to the phase-locked loop clock signal after frequency spreading as the system clock of the I.MX6 chip to reduce the radiation interference in the second frequency width range through the frequency multiplication effect.
In one embodiment, the second bandwidth range is 800MHZ-900MHZ, for example, the i.mx6 chip includes four cores, operating at 1.2GHz, with 1MB L2 buffer and 64-bit DDR3(Double Data Rate) or 2-channel, 32-bit L PDDR2 (L ow Power Double Data Rate) support.
Preferably, the 890MHz radiation interference can be reduced by means of frequency doubling effects.
Referring to fig. 1a, fig. 1a shows the test results of radiation intensity before and after spreading for the method of reducing the radiation interference of the i.mx6 chip according to embodiment 1 of the present invention.
In one embodiment, the upper graph of fig. 1a shows the radiation intensity test result before spreading, and the lower graph of fig. 1a shows the radiation intensity test result after spreading. At 890MHZ, the superscript value before the spread spectrum is 0.25dB, and the frequency of the clock signal of the phase-locked loop after the spread spectrum is repeatedly reduced and increased between 516MHZ and 528MHZ, so that the superscript value of 0.25dB is eliminated, and the radiation interference generated by the I.MX6 chip can be effectively reduced.
Example 2
Referring to fig. 2, fig. 2 is a block diagram illustrating an apparatus (hereinafter, referred to as "apparatus") for reducing radiation interference of an i.mx6 chip according to embodiment 2 of the present invention. The apparatus 200 includes a signal conversion module 210 and a spreading module 220, wherein the signal conversion module 210 is electrically connected to the spreading module 220.
The signal conversion module 210 turns off the phase-locked loop clock signal.
The signal conversion module 210 switches the pll clock signal to operate as the system clock of the i.mx6 chip to the oscillating clock signal to operate as the system clock of the i.mx6 chip.
The spreading module 220 turns on the spreading function of the pll clock signal.
The spreading module 220 sets the bandwidth of the spread pll clock signal to repeatedly perform frequency reduction and frequency increase within a first bandwidth range, wherein the single frequency reduction and frequency increase of the spread pll clock signal are performed at a first time threshold.
The signal conversion module 210 switches the oscillation clock signal as the system clock of the i.mx6 chip to the spread pll clock signal as the system clock of the i.mx6 chip to reduce the radiation interference in the second bandwidth range by the frequency multiplication effect.
Preferably, the first bandwidth range is 516MHZ to 528MHZ, the first time threshold is 500ms, when the spread pll clock signal is used as a system clock of the i.mx6 chip to perform frequency up-conversion, the frequency of the spread pll clock signal is increased from 516MHZ to 528MHZ at a preset step frequency, when the spread pll clock signal is used as the system clock of the i.mx6 chip to perform frequency down-conversion, the frequency of the spread pll clock signal is decreased from 528MHZ to 516MHZ at the preset step frequency.
Preferably, the predetermined step frequency is 60 KHZ.
Preferably, the second bandwidth ranges from 800MHz to 900 MHz.
Therefore, the invention provides a method for reducing radiation interference of an I.MX6 chip, and the anti-interference method comprises the following steps: closing a phase-locked loop clock signal; switching the work of a phase-locked loop clock signal as a system clock of an I.MX6 chip to an oscillation clock signal as the system clock of the I.MX6 chip; starting a spread spectrum function for a phase-locked loop clock signal; setting the bandwidth of the spread phase-locked loop clock signal to repeatedly perform frequency reduction and frequency increase in a first bandwidth range, wherein the single frequency reduction and frequency increase of the spread phase-locked loop clock signal are performed at a first time length threshold; the oscillation clock signal is used as the system clock of the I.MX6 chip to work and is switched back to the phase-locked loop clock signal after frequency spreading to be used as the system clock of the I.MX6 chip, so that the radiation interference in the second frequency width range is reduced through the frequency multiplication effect. The invention can effectively reduce the radiation interference of the I.MX6 chip generated in the second frequency width range through the spread spectrum function and the frequency multiplication effect. In addition, the spread spectrum range of 516MHZ to 528MHZ is 12MHZ, and the interference generated by the clock signal of the phase-locked loop at 800MHZ to 900MHZ can be reduced through the frequency multiplication effect.
In addition, the invention also provides a computer terminal, and the terminal equipment can comprise a smart phone, a tablet computer, a desktop computer, a portable computer and the like. The terminal device comprises a memory and a processor, wherein the memory can be used for storing a computer program, and the processor executes the computer program so as to enable the terminal device to execute the method or the functions of the modules in the device.
The memory may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the terminal device, and the like. Further, the memory may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The embodiment also provides a computer storage medium for storing the computer program used in the computer terminal.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative and, for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, each functional module or unit in each embodiment of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention or a part of the technical solution that contributes to the prior art in essence can be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a smart phone, a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.
Claims (8)
1. A method for reducing radiated interference from an i.mx6 chip, the method comprising:
closing a phase-locked loop clock signal;
switching the phase-locked loop clock signal as a system clock of the I.MX6 chip to an oscillation clock signal as the system clock of the I.MX6 chip;
starting a spread spectrum function of the clock signal of the phase-locked loop;
setting the bandwidth of the spread phase-locked loop clock signal to repeatedly perform frequency reduction and frequency increase in a first bandwidth range, wherein the single frequency reduction and frequency increase of the spread phase-locked loop clock signal are performed in a first time length threshold, and the first bandwidth range is 516-528 MHZ;
and switching the oscillation clock signal as the system clock of the I.MX6 chip to the phase-locked loop clock signal after the spread spectrum as the system clock of the I.MX6 chip to reduce the radiation interference in a second bandwidth range by a frequency multiplication effect, wherein the second bandwidth range is 800MHZ-900 MHZ.
2. The method as claimed in claim 1, wherein the first time threshold is 500ms, the frequency of the spread pll clock signal is increased from 516MHZ to 528MHZ at a predetermined step frequency when the spread pll clock signal is used as the system clock of the i.mx6 chip for frequency up-conversion, and the frequency of the spread pll clock signal is decreased from 528MHZ to 516MHZ at the predetermined step frequency when the spread pll clock signal is used as the system clock of the i.mx6 chip for frequency down-conversion.
3. The method of claim 2, wherein the predetermined step frequency is 60 KHZ.
4. The device for reducing the radiation interference of the I.MX6 chip is characterized by comprising a signal conversion module and a spread spectrum module, wherein the signal conversion module is electrically connected with the spread spectrum module;
the signal conversion module closes a phase-locked loop clock signal;
the signal conversion module switches the phase-locked loop clock signal to be used as a system clock of the I.MX6 chip to be switched to be used as an oscillation clock signal to be used as the system clock of the I.MX6 chip to work;
the spread spectrum module starts the spread spectrum function of the clock signal of the phase-locked loop;
the spread spectrum module sets the bandwidth of the spread phase-locked loop clock signal to repeatedly perform frequency reduction and frequency increase in a first bandwidth range, wherein the single frequency reduction and frequency increase of the spread phase-locked loop clock signal are performed in a first time length threshold, and the first bandwidth range is 516MHZ-528 MHZ;
the signal conversion module switches the oscillation clock signal as a system clock of the I.MX6 chip to the phase-locked loop clock signal after frequency spreading as the system clock of the I.MX6 chip so as to reduce the radiation interference in a second bandwidth range by frequency multiplication effect, wherein the second bandwidth range is 800MHZ-900 MHZ.
5. The apparatus of claim 4, wherein the first time threshold is 500ms, the frequency of the spread PLL clock signal is increased from 516MHZ to 528MHZ at a predetermined step frequency when the spread PLL clock signal is used as the system clock of the I.MX6 chip, and the frequency of the spread PLL clock signal is decreased from 528MHZ to 516MHZ at the predetermined step frequency when the spread PLL clock signal is used as the system clock of the I.MX6 chip.
6. The apparatus of claim 5, wherein the predetermined step frequency is 60 KHZ.
7. A computer terminal, characterized in that it comprises a memory for storing a computer program and a processor running the computer program to make the computer terminal execute the method for reducing radiated interference of an i.mx6 chip according to any one of claims 1 to 3.
8. A computer-readable storage medium, characterized in that it stores the computer program used in the computer terminal of claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811575216.5A CN109683677B (en) | 2018-12-21 | 2018-12-21 | Method and device for reducing radiation interference of I.MX6 chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811575216.5A CN109683677B (en) | 2018-12-21 | 2018-12-21 | Method and device for reducing radiation interference of I.MX6 chip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109683677A CN109683677A (en) | 2019-04-26 |
| CN109683677B true CN109683677B (en) | 2020-07-14 |
Family
ID=66188832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811575216.5A Active CN109683677B (en) | 2018-12-21 | 2018-12-21 | Method and device for reducing radiation interference of I.MX6 chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109683677B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101257305A (en) * | 2007-02-26 | 2008-09-03 | 明基电通股份有限公司 | Method and apparatus for reducing electromagnetic interference |
| CN105070711A (en) * | 2015-08-18 | 2015-11-18 | 硅谷数模半导体（北京）有限公司 | Method and device for resisting electromagnetic interference |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101449479B (en) * | 2006-04-03 | 2015-05-13 | 卡巴公司 | Method and system for information transmission |
| CN104660030B (en) * | 2013-11-25 | 2017-05-24 | 上海博泰悦臻电子设备制造有限公司 | Method and device for preventing switching power supply from interfering broadcast station channel |
| CN104378108B (en) * | 2014-12-04 | 2017-10-03 | 龙迅半导体（合肥）股份有限公司 | A kind of clock signal output intent and circuit |
| CN106356021B (en) * | 2015-07-14 | 2020-02-14 | 西安诺瓦星云科技股份有限公司 | Method for reducing electromagnetic interference of LED display screen and LED display control card |
| CN106230446B (en) * | 2016-08-19 | 2019-04-12 | 维沃移动通信有限公司 | A kind of anti-jamming circuit, mobile terminal and the method for inhibiting harmonic wave interference |
-
2018
- 2018-12-21 CN CN201811575216.5A patent/CN109683677B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101257305A (en) * | 2007-02-26 | 2008-09-03 | 明基电通股份有限公司 | Method and apparatus for reducing electromagnetic interference |
| CN105070711A (en) * | 2015-08-18 | 2015-11-18 | 硅谷数模半导体（北京）有限公司 | Method and device for resisting electromagnetic interference |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109683677A (en) | 2019-04-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105070711B (en) | Electromagnetism interference method and apparatus | |
| JP4636767B2 (en) | Clock circuit, GSM telephone and method for reducing electromagnetic interference | |
| US9553567B2 (en) | Fast settling charge pump with frequency hopping | |
| JP6290272B2 (en) | Apparatus and system for providing spread spectrum to a clock signal | |
| CN106230446B (en) | A kind of anti-jamming circuit, mobile terminal and the method for inhibiting harmonic wave interference | |
| CN107407942A (en) | Under-voltage detects and property regulation | |
| CN108495344B (en) | Network switching method, device and terminal | |
| CN109683677B (en) | Method and device for reducing radiation interference of I.MX6 chip | |
| FI83143C (en) | FOERFARANDE OCH ANORDNING FOER DAEMPNING AV RADIOFREKVENTA STOERNINGAR FOERORSAKADE AV KLOCKFREKVENSES HARMONISKA KOMPONENTER I DIGITALISKA ANORDNINGAR. | |
| RU2717696C1 (en) | Electronic device and antenna component thereof | |
| CN105163570B (en) | Electromagnetism interference method and apparatus | |
| CN106919857B (en) | Chip, and starting protection device and method of chip | |
| CN210404814U (en) | Charging circuit of smart phone | |
| EP2777156A2 (en) | Oscillator based frequency locked loop | |
| US20090189659A1 (en) | Switching circuit in a phase locked loop (pll) to minimize current leakage in integrated circuits | |
| US11374600B1 (en) | System, apparatus and method for mitigating digital interference within radio frequency circuitry | |
| WO2012087599A2 (en) | Platform rfi mitigation | |
| US20130120958A1 (en) | Method for performing chip level electromagnetic interference reduction, and associated apparatus | |
| CN210957784U (en) | Lightning indirect effect protection module of communication signal | |
| CN101820456A (en) | Mobile phone using metal shell as FM antenna | |
| CN202435415U (en) | Wireless network radio frequency jammer based on USB (Universal Serial Bus) interface | |
| CN201585005U (en) | Mobile phone using metal casing as FM antenna | |
| JP2006238315A (en) | Method of measures and circuit against emi for electronic circuit device | |
| US20230137011A1 (en) | Radio Frequency Chip, and Method and Apparatus for Designing Radio Frequency Chip | |
| JP2006293587A (en) | Clock generation circuit, clock generation method and electronic equipment using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220831 Address after: Room JT5510, Building 2, No. 3131, Jinshajiang Road, Zhenxin Street, Jiading District, Shanghai, 200000 Patentee after: Shanghai Auto Union World Information Technology Co.,Ltd. Address before: 518100 floor 2, building B, phase I, gaoxinxin science and Technology Industrial Park, Liuxian 1st Road, district 67, Xin'an street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN AUTOLINK INFORMATION TECHNOLOGY Co.,Ltd. |