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Electromagnetic interference elimination device and method

A technology of electromagnetic interference and charge pump, which is applied in the direction of output power conversion device, electrical components, automatic power control, etc., can solve the problems of high-power circuit invalidity, EMI suppression components weaken conduction interference, etc., and improve the seriousness of electromagnetic interference radiation , Reduce the effect of radiation interference

Inactive Publication Date: 2018-01-19
HKC CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] At present, the commonly used method is to add EMI suppression components to the output of the power supply, or use an RC (resistor and capacitor in series) buffer circuit, but the EMI suppression component can only reduce a part of the conduction interference, and it is powerless for radiation interference. The RC snubber circuit is suitable for small power circuits. Can play a certain effect, but generally invalid for high-power circuits

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  • Electromagnetic interference elimination device and method
  • Electromagnetic interference elimination device and method

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Embodiment Construction

[0023] The following descriptions of the various embodiments refer to the accompanying drawings to illustrate specific embodiments in which the present invention can be practiced. The directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc., are for reference only The orientation of the attached schema. Therefore, the directional terms used are used to illustrate and understand the present invention, but not to limit the present invention.

[0024] In the embodiments of the present invention, in order to help explain the method of the present invention, it will be assumed that an EMI canceling device is used to implement the method of the present invention. However, it should be understood that the devices and / or methods may be changed and do not necessarily work in relation to each other as described below, and these changes are within the scope of the present embodiments. It can be under...

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Abstract

The invention relates to an electromagnetic interference elimination device and method. The electromagnetic interference elimination device comprises a time sequence control chip and a lock-locked loop module, wherein the lock-locked loop module is electrically connected with the time sequence control chip and comprises a phase detection unit, a charge pump unit, a voltage control oscillator unitand a frequency divider unit, the phase detection unit is used for detecting a frequency generated by a time block period and generating a frequency difference value, the charge pump unit is used forgenerating an adjustment voltage, the voltage control oscillator unit is used for controlling an oscillation frequency when the adjustment voltage inputs, and the frequency divider unit is used for generating a new output clock frequency when a clock frequency is input.

Description

technical field [0001] The invention relates to a method for eliminating electromagnetic interference, in particular to a device and method for eliminating electromagnetic interference. Background technique [0002] Electronic products generate electromagnetic radiation during operation, which may interfere with the normal operation of other devices and even affect human health. Therefore, most countries have established regulations on the electromagnetic radiation of electronic products to prevent electromagnetic interference (EMI) from causing harm . [0003] One of the components of electronic products, the "Integrated Circuit (IC)" is one of the main sources of electromagnetic radiation. The electromagnetic radiation generated by the "inductance" in the integrated circuit may not only interfere with external devices, but also in some applications It may interfere with the operation of internal components, especially in the differential mode LC tank, if the equivalent in...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/44H03L7/183
CPCH02M1/44H03L7/183G09G3/00
Inventor 王明良
Owner HKC CORP LTD
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