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1st May 2009, 03:34 #1Full Member level 5
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advantage of active filter
Hi Guys
what is the advantages of active filter? The only advantage I can think is active filter can give you, is there any other reasons for it?
Thanks,
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1st May 2009, 03:34
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1st May 2009, 04:52 #2Member level 4
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why do we use active filter
basically you can adjust gain
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1st May 2009, 04:52
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1st May 2009, 05:25 #3Full Member level 4
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why we use active filter
almost free from input and output impedance changes
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1st May 2009, 05:25
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1st May 2009, 08:42 #4Advanced Member level 5
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Re: why do we use active filter?
There are several adantages:
Originally Posted by liletian
1.) Most important: No inductances, which are heavy, expensive, sensitive to electro-magnetic effects, not integrateable, not easy to tune, ....
2.) Filter design is easy, as you only need to caculate 2nd order stages, which can be cascaded to higher order filters (because of low output impedances)
3.) They can be tuned by voltages or currents
4.) They can provide gain
5.) Active filter topologies can be fully integrated (OTA-C or gm-C approaches)
6.) They are the basics to design S/C filters
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