I've done the schematic of the new filter at build it... With 5% capacitors and inductances (without any sort).
I've currently working on the same filter but with selected capacitors and inductances.
The schematic
The circuit
Multitone sweep -11th (magenta) vs 5th (yellow) order filter, 1dB/div, 100MHz lin
Multitone sweep -11th (magenta) vs 5th (yellow) order filter, 5dB/div, 100MHz lin
Multitone sweep -11th (magenta) vs 5th (yellow) order filter, 3dB/div, 125MHz lin
Multitone sweep -11th (magenta) vs 5th (yellow) order filter, 6dB/div, 125MHz lin
Multitone sweep - 11th (magenta) vs 5th (yellow) order filter, 10dB/div, 500MHz lin
Sine sweep - 11th (magenta) vs 5th (yellow) order filter, 1dB/div, 50MHz lin
Sine sweep - 11th (magenta) vs 5th (yellow) order filter, 10dB/div, 500MHz lin
Square signal at 2.5MHz - 11th (magenta) vs 5th (yellow) order filter
Square signal at 5MHz - 11th (magenta) vs 5th (yellow) order filter
Square signal at 10MHz - 11th (magenta) vs 5th (yellow) order filter
Square signal at 25MHz - 11th (magenta) vs 5th (yellow) order filter
Channel crosstalkYellow : measurement on 5th order filter channel at off state, 11th order filter channel with multitone sweep.
Green : measurement on 5th order filter channel at off state, 11th order filter channel with multitone sweep at off-state !!!
Magenta : measurement on 11th order filter channel at off state, 5th order filter channel with multitone sweep.
Blue : measurement on 11th order filter channel at off state, 5th order filter channel with multitone sweep at off-state !!!
Pro and cons of this 5th order filter "1st version"
- Need to select with high precision the capacitors and inductances
- Very simple and fast to install
- The compensation filter provides excellent linearity
- The square signal is more raw with lot of harmonics than soft square signal with the 11th order filter