Basically I want a circuit that can convert a sine wave to cosine wave.
I cannot use a passive circuit like LR circuit since my frequency of operation is very low ( a few Hz) so the passives would be very huge.
What I was trying to do was a op-amp differentiator circuit ; since differentiation of sine is cos.
The image of the circuit I am using is attached.
http://img683.imageshack.us/i/circuitl.jpg/
My values are R2=157k,R1=1k, C1=.1u, C2=220p : input frequency - 10 Hz
However, I am getting a distortion as shown below
http://img215.imageshack.us/i/waveforms.jpg/
Any comments/suggestions?
If there is any other way of doing this, I am open for it.
I cannot use a passive circuit like LR circuit since my frequency of operation is very low ( a few Hz) so the passives would be very huge.
What I was trying to do was a op-amp differentiator circuit ; since differentiation of sine is cos.
The image of the circuit I am using is attached.
My values are R2=157k,R1=1k, C1=.1u, C2=220p : input frequency - 10 Hz
However, I am getting a distortion as shown below
http://img215.imageshack.us/i/waveforms.jpg/
Any comments/suggestions?
If there is any other way of doing this, I am open for it.