Integrator Op Amp help

Thread Starter


Joined Aug 16, 2011
Hi there!

I'm having trouble with Intergalactic Op amps. I'm fairly new on the subject, I've seen lots of stuff on the internet regarding a DC Input but nothing regarding Sine waves.

I've attached the question so anyone can have a look at it, I am suppose to draw the output.

So far I've got:
Vout = -Vin/RC
When Vin = 5mv, vout -= -10mV
When Vin =-5mv. vout = 10mV

I know there is also a phase shift, I suspect it'd be either + or - 90 degrees.

I have no idea how correct this is or even if I'm on the right track. A bit of help would be great :)

Thanks guys, I swear by your tutorials!



Joined May 3, 2010
You're on the right track. Have you ever used phasors before? They are a nice way of dealing with sinusoids instead of dealing with differential equations. You basically transform each component into its phasor form then solve the circuit like you normally would, turning a differential equation problem into an algebraic problem.