I have precision amplifier with three fixed gain step, 3x AD8021 with gain 10x, 50ohm sysem, frequency order MHz (DC decoupled),
Gain is selectable over three ralays.
In next generation I thing about replacing relay any analog switch , for example ADG1436.
Unfortunately, semiconductor switches have a number of disadvantages, significant resistance, parasitic capacity, current lekage etc.
You do not appnote or sample solution with an error analysis in similar aplication?