Hi,
I am an Electrical Engineer and an expert in NI Multisim, Proteus and MATLAB. I have working experience in all these softwares. I can show the samples before starting the work. I have knowledge about oscillators using op_amp circuit and filters namely; pass band, band reject, high pass and low pass filters, including butterworth and chebyshev filters. I know the basics about these circuits, their roll off rate, gain and margin.
Please do contact me to get your problem resolved perfectly.
Thanks for hearing me out.