Show me how to draw op-amp circuits

[benji_styler]

Hi im struggling drawing circuits for some practice electronic theory questions i have. Could some one please show me how they should be drawn?

How to draw the circuit for an op-amp inverting amplifier witha a gain of -50?

How to draw the circuit of an op-amp inverting adder to procuce an output f magnitude ten times the sum of the inputs?

How to draw the circuit for an op-amp non inverting amplifier with a gain of 40?

Any help would be much appriciated i dont have much experince/luck with drawing circuits!

Added after 1 hours 18 minutes:

Hi i could really do with some help on this? could any one spare the time? it would be much appriciated

 

[Ave_Rapina]

Re: drawing circuits

Hello

h**p://www.rfcafe.com/references/electrical/opamps.htm

Regards

 

[benji_styler]

Re: drawing circuits

Hi, I have looked at the diagrams. Still at bit unsure... where/how would i add the gain to the diagram? ad what other values would i need to add to the diagram?

Sorry for my inexperience

 

[Ave_Rapina]

Re: drawing circuits

Hello

The gain is given by V0/Vi

for example inverting is -R2/R1

Regards

 

[benji_styler]

Re: drawing circuits

thanks for you response. I have this formula for inverting Vout = -Rf/R1 Vin

i dont have much experience with drawing circuits. where would i put a gain of -50 on the diagram or would it go in the formual?

im a bit lost... do you know the solution?

 

[Ave_Rapina]

Re: drawing circuits

hello

For example if you want a gain of -50 you must put one resirtor for example 1K
and the other will be 50K.
Never put low values on the resistor keep upper than 1K.

depending of the opamp you can use tha gai of 50 until the frequancy given by

Fmax = Funi/Av

That Funi is the frequency that the ampop has the unir«t gain and depends of the device.
Av is the gain that you define for the circuit.

Fmax is the max frequency that you can inject without any attenuation of the gain inicialy defined.
In upper frequency tha gain will be lower.
The solution is use a better frequency response opamp or use for example two opamp defined an 7.07 gain in each. 7*7 aprox 50
Is this solution the max frequency will be higher.
Fmax= Funi/Av If Av lower then Fmax is Higher.

Just use the more adquated solution or an combination of several.

Regards