Hi , Iam using switched capacitor because the integrating frequency is a function of capacitor ratios and can be finely tuned. It is also possible to achieve higher attenuation by using switched capacitor. One question in my mind is that what if my input signal is in the same range of the op-amp's f3dB pole or the dominant pole, wont it undergo an attenuation according to frequency response of the op-amp used?Hi,
Why "switched capacitor" instead of pure analog?
Usually the Opamp is at the output of a SC filter. Therefore it just has to amplify the reduced bandwidth.
But for sure you have to choose a suitable Op-amp for this.
Klaus
What do you mean with "infinite" attenuation?I want to know the reason for infinite attenuation as my output.
Yes, you see an AC output signal, it's swinging around 1.65V, just normal operation.actually 1.65v is my DC common mode. So my output is going below that at the stopband frequency so Iam worried about this situation
What else do you expect from a low pass filter with 72 dB attenuation?But Iam not getting an AC output. Its almost constant at DC
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?