Biquad filter with chebyschev characteristics

[rinaishlene]

biquad filter simulator

Hi,

I'm working on a class project designing a low pass biquad filter with gain 2 and cut off frequency of 1kHz that follows the 3dB Chebyschev characteristics.From the simulation using PSpice,the circuit that we designed worked perfectly...but when we installed all the components on the breadboard and run the test using function generator and oscilloscope.,the circuit didn't function well.We input the sine wave form but the output was distorted.(not perfect sine wave)

I'm not sure what will be the actual output of this filter.

An if the output is distorted,when we try to obtain the gain by Vo/Vi,we didn't get the characteristics frequency response.

Please help to let us understand better.

Thanks

Rina

 

[yorande]

Hi, do u use input/output impedance when simulation?
I have the same problem as u, but at much higher frequency.

 

[rinaishlene]

No I dont use i/p o/p impedance...well my hardware are having a problem not my simulation.My simulation works perfectly

 

[northeast1]

Hi,

I'm working on a class project designing a low pass biquad filter with gain 2 and cut off frequency of 1kHz that follows the 3dB Chebyschev characteristics.From the simulation using PSpice,the circuit that we designed worked perfectly...but when we installed all the components on the breadboard and run the test using function generator and oscilloscope.,the circuit didn't function well.We input the sine wave form but the output was distorted.(not perfect sine wave)

I'm not sure what will be the actual output of this filter.

An if the output is distorted,when we try to obtain the gain by Vo/Vi,we didn't get the characteristics frequency response.

Please help to let us understand better.

Thanks

Rina

you can give 0.5khz sine wave and 5khz sine wave, 0.5Khz sine wave can pass without distortion, but 5Khz sine wave cant pass through

 

[rinaishlene]

It's okay...i have already gotten the perfect wave form my hard ware....feel so good