This was SOOO helpful. After class i kept asking why does my teacher sometimes say BandPass and other times say PassBand. Well now i know!!! THANK YOU!!!
13:00 I had a revelation here that this configuration can be whatever you want it to be (integrator, differentiator, band-pass) depending on what frequency you are interested in and your choice of resistors and capacitors. Thanks!
+Salliance This is way old, but since the output voltage is AC, we don't really care about negative or positive. -V is just V phase shifted 180°. If we're only concerned with magnitude the negative sign can be dropped.
Isn't the gain Negative? (-R2/R1) , For the inverting amplifier, Also, In Microelectronics circuit analysis 3rd book says that the voltage transfer function of a high pass filter is: T(s) = (sRC)/(1+sRC) however, the voltage transfer function of a Low pass filter is: T(s) = 1/(1+sRC) Looking forward to hear from you "humanHardDrive"
oh... i wish to find an article or a video about different analog filter _models_ . Is it somewhere? I'm worrying that Steiner-Parker... is not a filter type but may be a kind of different Sallen-Key filter... Can it be?
Great jon HHD,,,was wondering about the second bandpass filter,,does it matter what order the Hi or lo sections are placed,,, Also I noticed your connecting your inputs to the Negative or inverting input of the op amp,,,can you tell me why,,and why not the input on the Positive or non-inverting input,, Also what about second order active Hi Pass Lo pass and Band pass filter calculations. Thanks for the great video,
The gain is for the "flat" part of the frequency response curve -- at these frequencies, the capacitor has no impact on the circuit and the gain is determined entirely by the resistors.
In your op-amp low pass filter, what do you mean when you say zero bias? Your still biasing the op amp normally with external power right? If you have zero bias how does the op-amp have power to operate?
