# Homework Help: Summing Amplifier Question!

1. Feb 16, 2012

### ally34

1. The problem statement, all variables and given/known data

2. Relevant equations

Absolutely no idea how to start this problem!

3. The attempt at a solution

A) I would think that there are 4 input combinations for this circuit.

B) 0110 = 6v?

C) No clue

D) 1011 = 11v?

E) No clue

#### Attached Files:

• ###### 2-16-2012 11-37-43 AM.jpg
File size:
50.7 KB
Views:
109
2. Feb 16, 2012

### likephysics

Part C is simple, the input is given in sin(2*pi*f*t). Just plug n chug to find f.

3. Feb 16, 2012

### ally34

How is the input given in sin(2*pi*f*t)??

4. Feb 16, 2012

### likephysics

It's a standard way of writing AC voltage or current, sin(2∏ft) or sin(ωt), cos (ωt)
I don't really know why it is this way.

5. Feb 16, 2012

### ally34

But the problem vs(t) = sin(4000pit)

So ω = 4000?

2pi*f*t = 4000*pi*t

so f = 2000hz?

6. Feb 16, 2012

### likephysics

Yup.

7. Feb 16, 2012

### ally34

Cool -thanks.