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Electronic circuit with separated earthing

An electronic circuit and isolation technology, which is applied in the field of electronic circuits with isolated grounding, can solve problems such as noise-sensitive device interference, achieve the effect of isolating noise and increasing manufacturing costs

Active Publication Date: 2006-01-25
NEW H3C TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0008] What the present invention aims to solve is the problem that noise propagation interferes with noise-sensitive devices in the ground plane of existing electronic circuits

Method used

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  • Electronic circuit with separated earthing
  • Electronic circuit with separated earthing
  • Electronic circuit with separated earthing

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Embodiment Construction

[0024] As mentioned above, in the prior art, for a certain electronic circuit module, the ground terminals of all electronic devices on it are directly connected to a complete ground plane. In this way, the noise generated by some electronic devices on the ground plane during operation and / or the noise generated by other noise sources on the PCB forms a noise signal backflow on the complete ground plane, causing interference to other electronic devices.

[0025] Therefore, to isolate noise signals from the PCB ground plane for some electronic devices sensitive to ground plane noise, the method used in the present invention is to prevent the noise signals from flowing back through these electronic devices at the ground point of the PCB ground plane, thereby effectively reducing these electronic components. Noise at the device ground point.

[0026] In the present invention, the complete ground plane in the prior art is divided into a unified ground plane and at least one separa...

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Abstract

An electronic circuit with isolated earthing is prepared as connecting the earthing terminal of electronic component with isolated earthing to independent horizontal plane , connecting the earthing terminal of electronic component with non -isolated earthing to unified horizontal plane and connecting independent horizontal plane to unified horizontal plane by single point . It can isolate noise between independent horizontal plane and unified horizontal plane effectively.

Description

technical field [0001] The present invention relates to an electronic circuit, in particular to an electronic circuit with an isolated ground. Background technique [0002] With the development of integrated circuits, the functions of electronic devices have become more and more powerful, and the manufacturing process has been continuously upgraded. A large number of chips that work with low voltage and high current have appeared, which has promoted the PWM (Pulse Wide Modulation, pulse width modulation) step-down voltage control. Chips are widely used. [0003] The PWM chip and MOSFET (metallic oxide semiconductor field effect transistor, metal oxide semiconductor field effect transistor), inductor, capacitor, etc. together form a PWM switching power supply circuit, which provides various voltages required for electronic devices and becomes the key to reliable operation of electronic systems . While the PWM switching power supply circuit provides low voltage and high curr...

Claims

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Application Information

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IPC IPC(8): H02M3/155H02M1/00
Inventor 沈明柳义利洪建明董树国
Owner NEW H3C TECH CO LTD
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