Electronics - Operational Amplifiers - Discussion


Op-amps used as high- and low-pass filter circuits employ which configuration?

[A]. noninverting
[B]. comparator
[C]. open-loop
[D]. inverting

Answer: Option D


No answer description available for this question.

Vikas Sharma said: (Jun 8, 2011)  
I think we provide voltage at non-inverting terminal.
Can anyone Explain the above answer?

Pushp Raj said: (Aug 10, 2011)  
Opam is always used with inverting terminal. Since non inverting terminal has only two state output.

Kshitij Sharma said: (May 25, 2012)  
Actually I think that non-inverting mode of the Op-amp is used here because of the frequency stability.

Sumithra said: (Sep 8, 2012)  
I think voltage is applied noninverting terminal. How the answer is inverting? Anyone explain.

Manu M. said: (Jul 31, 2013)  
I think because of high input impedance in the non-inverting mode, most of the filters are constructed in non-inverting mode.

Roy said: (Oct 17, 2013)  
@Manu you're correct. Due to high input impedance there is no current flow in the ideal op-amp, i.e. , a non-inverting one.

Tushar Yadav said: (Jan 20, 2016)  
Can any one explain how it comes ?

Chandu K said: (Feb 10, 2016)  
Yes its non-inverting amp.

Anmol said: (Apr 8, 2016)  
In the case of filters no loading is needed, so op-amp is used in the non-inverting configuration.

Dhanu said: (Jan 28, 2017)  
Low pass filter is same as integrator and high pass filter is same as differentiator so the integrator is similar to the inverting amplifier with the exception that resistor RF is replaced by a capacitor. And The differentiator is similar to the inverting amplifier with the exception that resistor RG is replaced by a capacitor.

Ashif said: (Aug 4, 2019)  
You are correct, thanks @Dhanu.

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