Sorry if this is a silly question but...
I understand the STV can be used as a bandpass, low pass and high pass filter, but I'm not fully sure about the connection. Based on this picture,
http://www.circuitstoday.com/wp-content/…
does it mean I connect the load on the output of the desired design? So if I wanted it to work as a highpass filter I would connect the load on Q1? ( or a1 on the picture)
I understand the STV can be used as a bandpass, low pass and high pass filter, but I'm not fully sure about the connection. Based on this picture,
http://www.circuitstoday.com/wp-content/…
does it mean I connect the load on the output of the desired design? So if I wanted it to work as a highpass filter I would connect the load on Q1? ( or a1 on the picture)
-
The state variable filter does provide three outputs viz. HO, BP and LP. You could connect the load to any or all of them. If you wish you could add HP and LP in a summer and also get band reject.
If you know how to calculate the transfer function, do that you will find the the HP meeting the TF s^2/ (S^2+2.zeta wn.s+ wn^2) and BP with numerator as s, and LP with numerator as wn^2.
You could download data sheet of UAF41 for more details
If you know how to calculate the transfer function, do that you will find the the HP meeting the TF s^2/ (S^2+2.zeta wn.s+ wn^2) and BP with numerator as s, and LP with numerator as wn^2.
You could download data sheet of UAF41 for more details
-
The output of op amp A1 is the high pass output, the output of op amp A2 is the bandpass output, and the output of A3 is the low pass output.