sbinkhalid
Newbie level 3
Hi I am making a quadrature oscillator project and am using the attached circuit schematic. I have checked the circuit schematic on Proteus and its simulating fine. But i am having difficulty in understanding the functions of the resistors and capacitors used. Also I need explanation as to how the circuit is causing a phase shift of 90 degrees in output. Thanx
![circuit.png circuit.png](https://www.edaboard.com/data/attachments/20/20035-32c2e707f3cef90e3e1fec6067273335.jpg)
![](https://obrazki.elektroda.pl/35_1337855619_thumb.png)
![circuit.png circuit.png](https://www.edaboard.com/data/attachments/20/20035-32c2e707f3cef90e3e1fec6067273335.jpg)
![](https://obrazki.elektroda.pl/35_1337855619_thumb.png)