low pass and high pass filter design using opamp

[rp276]

can we configure low pass and high pass filter as inverting configuration using opamp? why? why not? please help..

 

[LvW]

can we configure low pass and high pass filter as inverting configuration using opamp? why? why not? please help..

Of course, you can.
For example using the multi-feeedback topology (MFB). Try to start an internet search.

 

[crutschow]

Do a search for "active filter".

 

[audiomik]

rp276
have a look at the "Op Amps for Everyone" application notes paper from Texas Instruments.
Chapter 16 covers what you are asking about on Active Filters with numerous other chapters on topics you may find of use.
Download from here: www.ti.com/lit/an/slod006b/slod006b.pdf

Mik

 

[Usama Siddiqui]

yes its possible,i believe just read the passive filters first,the opamp is basically a mere combination of that,now suppose if an RC combination provides a phase shift of 90 degrees so a combination of 2 of such pole(RC combination) will provide a phase shift of 180 degree,i.e it will invert the signal. you can easily find the solution to your query in Sedras. pdfs are available at google easily.

 

[LvW]

a combination of 2 of such pole(RC combination) will provide a phase shift of 180 degree,i.e it will invert the signal.

Yes - theoretically for infinite frequencies.
Rp276 - forget this answer.

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a combination of 2 of such pole(RC combination) will provide a phase shift of 180 degree,i.e it will invert the signal.

Yes - theoretically for infinite frequencies.
Rp276 - forget this answer.

 

[Usama Siddiqui]

Yes - theoretically for infinite frequencies.
Rp276 - forget this answer.

- - - Updated - - -


thnx lvw for rectifying me but i mentioned a possibility for his question