Is the Simulation Accurate? Analyzing an Op Amp Circuit with Multisim

In summary, the conversation is about solving a textbook question and finding the analytical and simulated results of current in a circuit. The person has provided the equations and results for the analytical solution and has also simulated it using Multisim. The only difference is in the value of current (Is), which the person has now figured out. The conversation ends with the person thanking for the help.
  • #1
Saeed.z
28
1
hi everyone ,

i solved a textbook question which says :

http://img268.imageshack.us/img268/8994/img1379sa.jpg

http://img685.imageshack.us/img685/3228/img1380z.jpg

and found analytically : ia = -470 uA, ib = 770 uA , ic = 22 uA, ig= 322 uA, is = 64.5 uA

Ra= 1kohms, Rb=2kohms, Rc = 1.5 kohms, Rf= 210 kohms , Vo = 14.5 v

and i simulate it by using multisim as shown below :

http://img32.imageshack.us/img32/8847/simue.png

the current (Is) looks different ! is there something wrong with simulation ? thanks : )
 
Last edited by a moderator:
Physics news on Phys.org
  • #2
Please show your equations for the results you got.
 
  • #3
ok ^^

Here is my solution :

http://img526.imageshack.us/img526/3480/ee1c.jpg

http://img444.imageshack.us/img444/1305/ee2f.jpg

hope it's clear :) thanks
 
Last edited by a moderator:
  • #4
=> Vn = 29/30 v and Vo = 14.5 v

=> I s = ( Vn - 0 ) / 15k = 64.44 uA

I a = ( Va - Vp ) / 1k = -466.67 uA

I b = (Vb - Vp ) / 2k = 766.67 uA

I c = ( Vc - Vp ) / 1.5k = 22.2 uA

I g = ( Vp - 0 ) / 3k = 322.2 uA
 
Last edited:
  • #5
any help ? thanks
 
  • #6
i got it ! thanks :)
 

FAQ: Is the Simulation Accurate? Analyzing an Op Amp Circuit with Multisim

What is an op amp circuit simulation?

An op amp circuit simulation is a computer program that models the behavior of an operational amplifier circuit. It allows the user to input circuit components and simulate the output of the circuit under various conditions.

Why is it important to simulate op amp circuits?

Simulating op amp circuits allows engineers and scientists to test and optimize their designs before physically building them. It can also help identify potential issues and troubleshoot any problems that may arise.

What types of op amp circuits can be simulated?

Most op amp circuit simulation programs can simulate a wide range of circuits, including inverting and non-inverting amplifiers, summing amplifiers, integrators, differentiators, and more complex circuits such as oscillators and filters.

How accurate are op amp circuit simulations?

The accuracy of an op amp circuit simulation depends on the program and its settings, as well as the complexity of the circuit being simulated. In general, simulations can provide a good approximation of the circuit's behavior, but physical testing is still necessary for precise results.

What are some common features of op amp circuit simulation programs?

Some common features of op amp circuit simulation programs include the ability to adjust circuit parameters, plot input and output waveforms, perform frequency and transient analyses, and generate reports. Many programs also offer a library of pre-made op amp models and components for easy circuit building.

Similar threads

Understanding Op-Amp Simulation in Multisim
Replies
16
Views
9K
Engineering Analyzing a Circuit with an Op-Amp
Replies
2
Views
2K
Engineering Op amp in circuit: find load current
Replies
5
Views
4K
Engineering Electronic circuit with Op-Amp, Switch and Diodes
2
Replies
39
Views
6K
Engineering Understanding Op-Amp Circuits: Simple Circuit Help & Calculation Tips
Replies
8
Views
4K
Engineering How Does Setting Rx to 60k Affect the Output Voltage in an Ideal Op Amp Circuit?
Replies
11
Views
20K

Hot Threads

Recent Insights

Back
Top