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| EMI Suppression Filters? | ||
| Author knoxville Views 8 Posted at 2008/8/27 19:25 [View In Forum] | ||
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wich is the main issue in choosing EMI Suppression Filters? jtsaohv jtsaohv what is the main difference between Chip Three-terminal Capacitor and Chip Ferrite Bead Inductor? |
| Reply No. | Replier | Total Replies 4 [View All Replies] [New Reply] | Replied at |
| 1 | bubulu | I have seen datasheet at this topic in ***.murata.com. Try find in your web's. | 2008/8/27 19:25 |
| 2 | anuo2008 | Overall depends on your application. For instance, if you know your apparatus is working close some high power transmitters ( i.e. radar ) you will select a filter with the maximum attenuation in the radar band (consider that always a EMC filter at some frequencies will decrease the attenuation, beyond the self resonating frequency ) Also you have to take care about mechanical installatoin ( through a metallic wall, PCB installation, shielded connectors, etc ). The main goal is to avoid the disturbs enter into your box and disturbing your electronic circuit. Also take a lot of care about shielding of the metallic box - IT HAS TO BE REALLY CONTINUOUS - and not only put four screws at the corners. About the PCB filters you have to take care : - working frequency of the disturbing signal ( if known ) - Current through the filter - Maximum working frequency If the frequency is unknown, just to pass the EN50081 & 50082 try to select filters workiking minimum until 1 GHz Mandi |
2008/8/27 19:25 |
| 3 | saigu | because the effect of emi on a circuit is as unwanted currents | 2008/8/27 19:25 |
| 4 | nnxd | The choice betwen inductor or capacitor filter components is based on the impedance of the circuit in which they are inserted. You can find a lot of information on murata web site | 2008/8/27 19:25 |
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