pullup
Junior Member level 1
bandpass filter design
I built a Biauad bandpass filter with TL084,the f0 is expected to be 220KHz,but when I finished the circuit, I found that it became an oscillator!
No matter how I change the value of the resistors,the only thing changed is the frequecy of the oscillator.
Can anybody tell me what is the problem and how can I avoid the oscillator?
Thank you for help.
I built a Biauad bandpass filter with TL084,the f0 is expected to be 220KHz,but when I finished the circuit, I found that it became an oscillator!
No matter how I change the value of the resistors,the only thing changed is the frequecy of the oscillator.
Can anybody tell me what is the problem and how can I avoid the oscillator?
Thank you for help.