Op Amp question

[alphacat]

Is there any configuration of an Op Amp (with feedback), that would give a gain equal to the ratio of two resistors - say R1/R2? (polarity doesnt matter).

Thank you.

 

[pankhuri01]

yes.
finite impedance amplifier.
you must have read about voltage controlled voltage source.,in that if you ground v1. you will get it!

 

[alphacat]

Could you pleaes attach a schematic of such configuration?

 

[dougy83]

Inverting amplifier. Gain is -R1/R2

Operational amplifier applications - Wikipedia, the free encyclopedia

 

[alphacat]

Thanks fellow.

 

[Vizier87]

The datasheets of op-amps like LM358 also give out excellent schematics, I learnt that the hard way.

 

[jcircuited]

hi there

its easy i think. just need to use the op amp as an inverting amp ,ie input to the negetive terminal
the gain will be -R1/R2

 

[pankhuri01]

there is non inverting amplifier,look for that!
https://www.electro-tech-online.com/custompdfs/2010/02/btech_electronics_and_communication.pdf
go and see this there r various types of amplifier and u will find urs!

 

[audioguru]

there is non inverting amplifier,look for that!

No.
A non-inverting amplifier has a gain that is more than the ratio of two resistors.

 

[Vizier87]

it is the inverting amplifier, yes.