# Op Amplifier Circuit

1. Jun 2, 2012

### MEM33

1. The problem statement, all variables and given/known data
Design an op amp circuit that acts as low-pass filter with the following transfer function

G(s) = 10/(s +10)

2. Relevant equations

Inverting operational amplifier Vo(s)/Vi(s) = Z2(s)/Z1(s)

Non-inverting operational amplifier Vo(s)/Vi(s) = Z1(s) + Z2(s)/ Z1(s)

3. The attempt at a solution

The fact that there is no negative sign in the transfer function leads me to believe I need to use the non-inverting equation, but I can't seem to find any combination of components that cancel out and gives me the given transfer function.

2. Jun 2, 2012

### Staff: Mentor

Re: Open Amplifier Circuit

I think you can get that single pole with a passive R-C low-pass filter. Can you buffer its output with a voltage follower?

3. Jun 4, 2012

### rude man

Re: Open Amplifier Circuit

Takes 4 R's and 2 C's. The two C's have the same value, and 2 of the R's are 10 times the value of the other two. Yes, the input is via the + op amp input pin.