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Filter wire laying and design method thereof

A wiring design and filter technology, which is applied in the field of filter wiring and its design, can solve the problems of elongated separation distance and π-type filter failure, and achieve the effect of eliminating high-frequency noise.

Inactive Publication Date: 2011-08-17
MITAC COMP (SHUN DE) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the present invention provides a filter wiring. By arranging the ground terminals of the two capacitors of the π-type filter on the base board, the distance between them is elongated, so as to solve the problem in the prior art that is easy to return to the signal line due to noise. The disadvantages that cause the failure of the π-type filter

Method used

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  • Filter wire laying and design method thereof
  • Filter wire laying and design method thereof
  • Filter wire laying and design method thereof

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Embodiment Construction

[0020] The purpose of the present invention is to solve the problem that in the prior art, when designing the circuit board wiring of the π-type filter, the distance between capacitors arranged on the circuit board is too close, resulting in the failure of the π-type filter. In the following embodiments, a filter layout and a wiring design method are proposed to solve the above problems. image 3 It is a schematic diagram of filter wiring according to a preferred embodiment of the present invention. Please merge reference figure 1 and image 3 , the filter wiring 300 includes a base board 301 , and a first capacitor 303 , an inductor 305 (such as a bead) and a second capacitor 307 are disposed on the base board 301 . Wherein, the first capacitor 303 has a first ground terminal gnd1, the inductor 305 is coupled to one terminal of the first capacitor 303, and the second capacitor 307 is coupled to one terminal of the inductor 305 and has a second ground terminal gnd2. In addi...

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Abstract

The present invention discloses a filter wiring, which comprises a substrate plate provided with a first capacitance, electric inductance and a second capacitance, wherein, the first capacitance is provided with a first grounding end, while the electric inductance coupled to one end of the first capacitance; furthermore, the second capacitance is coupled to one end of the electric inductance and is provided with the second grounding end. When design Pi type filter wiring, set an interval between the first grounding end and the second grounding end with a distance of Lambada / n (Lambada as signal wavelength and n as signless integral smaller than 20). Thus, problem of noise coming back because of hypotelorism of Pi type filter grounding end can be avoided, so as to have the Pi type filter work normally.

Description

【Technical field】 [0001] The present invention relates to a wiring and a design method thereof, and in particular to a filter wiring and a design method thereof. 【Background technique】 [0002] In the process of circuit transmission signal (Signal), often due to some man-made noise sources (such as: digital electronics, radio transmission, motors, switches, relays, etc.), natural interference (such as: sunspots and lightning), pure Qualitative noise sources (for example: related random disturbances generated from actual systems, such as thermal noise and convex wave noise) or electromagnetic interference (Electromagnetic Interference, referred to as EMI) and other factors, resulting in misoperation of the circuit during operation . [0003] Among them, sources of EMI include microprocessors, switching circuits, electrostatic discharges, transmitters, transient power components, power supplies, and lightning. For example, in a microprocessor-based circuit board, digital seq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H7/01
Inventor 李煌基
Owner MITAC COMP (SHUN DE) LTD