while you may have been working on this every day, I will need to get back up to speed.bluebird said:John, I have been playing with this circuit since you put it in my lap, almost everyday after work. I'm very familiar with the workings of it now. The breadboard (with power supply) is now known in my family as "the box"... Honey are you working on the "the box" again tonight? ;D
Wondering if there is any way to make it differentiate the steady state and transients more aggressively. The transients dont seem to have the depth to really charge the smaller cap in a way that it is different from the larger cap. Its almost like the two caps are just in parallel and pinching the current off in the supply diode to the larger cap works perfectly but sounds like its just making the total parallel capacitance smaller.
Please post or link to the current schematic.
Everything or almost everything is adjustable but please state clearly what you want more/less of.Is it possible that the state variable filter is not steep enough? I actually tried a typical three op amp filter which is supposed to have a 12db per octave slope but adding the extra cap/op amp just made things all the more complicated to tune.
on reason I think it isn't as aggressive as I would like it to be, is because of the RMS detector is just too slow. Even with a .01uF cap on it. I tried a regular precision rectifier and I finally heard the transients being caught, but that muddled up the whole workings of the state variable filter.
I also tried the zener approach in the previous schematic to the final one you made. But again there wasn't enough voltage in the transients to trigger a 3.3v zener.
I had to reverse the steering diodes for attack and release because I have the half wave rectifier (that is in most of the THAT design notes) after the RMS detector. I needed it to have a threshold control.
Any more ideas?
JR