# Analog computer

1. Dec 9, 2006

### euler_fan

I am instructed to design an analog computer to solve the following equation using 2 summing amplifiers and a integrator. I have attached a image of what I've done. I am seeking confirmation of my circuit or hint as to how to proceed.

eqn: x' + 9x = 3

#### Attached Files:

• ###### ac1.JPG
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2. Dec 10, 2006

### Staff: Mentor

Thread moved to the Homework Forums.

Can you describe your circuit some for us? Why are you adding in 3V before doing the differentiation? What is the overall feedback for? Is V1 meant to be both x and the 3V offset?

3. Dec 10, 2006

### euler_fan

As I understand the process: solve for the highest derivative, so
U1: x' = -(-9x + 3)
U2: -x = Integration of x'
U3: x = inversion of -x feedback to U1

This was my implementation, I have also included a link to a pdf file I was using as reference [http://dcoward.best.vwh.net/analog/Aug00S&V.pdf] [Broken]

Once again, Thanks

Last edited by a moderator: May 2, 2017