an anti aliasing filter is which type of filter

Replies

• 

  yahia zakaria

  i think it is analog filter
• 

  pavani abburi

  It must be an analog filter. The high frequencies must be attenuated before any digital sampling takes place, to ensure that these high frequencies are not sampled as false signals
  
  Read more: #-Link-Snipped-#​
• 

  Sindhu Chowdary

  anti aliasing filter is simply a LOW PASS FILTER......the only important thing is the cut off frequency of the lpf used......it is used in accordance with the aliasing effect.....
• 

  Sagar07

  Well, I remember the question regarding anti-aliasing filter which was asked by the interviewer of Texas Instruments....
  "What exactly the anti-aliasing filters do??"
• 

  Sindhu Chowdary

  Sagar07

  Well, I remember the question regarding anti-aliasing filter which was asked by the interviewer of Texas Instruments....
  "What exactly the anti-aliasing filters do??"

  i think you know about aliasing effect during sampling.......
  Anti-alias filters are used to limit the bandwidth of a signal being input to a sampled
  system, such as a digital audio system, so that it is less than one half the system
  sample rate. This is required to avoid ambiguity resulting from the sampling process
  - which represents all signals as being within a frequency bandwidth defined by a
  ‘folding’ frequency of one half of the sample rate. Signals sampled at a frequency
  outside this range are ‘aliased’ so that they are indistinguishable from frequencies
  within it.