Sorry for the double post, but I think I see it. When the input signal is at F0, the capacitors "disappear," and you are left with something more like this:
http://upload.wikimedia.org/wikipedia/commons/4/41/Op-Amp_Inverting_Amplifier.svg
Could anyone shed some light on what effect the R2...
You are right, there is something strange about that schematic. I think the resistor to ground should be labelled an R3, as the ubiquitous formula for MFB frequency involves 3 resistor values.
Here is another schematic that shows correct lettering.
Rod Elliott, god bless his soul, also...
I am attempting to come up with a systematic way to design Multiple Feedback bandpass filters with certain specifications.
• Frequency is some given number
• Bandwidth varies with Frequency by
f0*2^13/12
• The Q should therefore be .4719
• The gain should be 1
I am at an understanding of how...
I know I keep harping on and on, but it seems more likely that in fact the Adobe Audition scale is completely unrelated to an actual log function. I've never met a log function that does not hug the y-axis (thus give very fine resolution - small frequency steps) from 0 out to, say, 1. This is...
Example: http://acousticaddicts.com/0001/AllFourSoftD.jpg
Notice how the distance from 100 to 1k is much smaller than the distance from 1k to 10k... What did they do to the scale?
Hi everyone,
So I'm trying to basically generate a list of numbers between 20 and 20,000 (Hz) in log space that will give good resolution to parts of the audio spectrum that matter! After all that is the point of using log scale for frequency in the first place.
The list generator I have...