benny_profane
Well-known member
I'm working on an op amp gain stage and wanted to have a toggle switch to shift the range of GAIN knob. I'd like to keep the dBV range constant while shifting the gain window. For example, a gain stage with a delta of 18dB has a 'Low' range of -6dB to +12dB and a 'High' range of +8dB to +26dB.
What would be the best architecture to accomplish this (i.e., inverting or non-inverting)? I think it should be possible to use one potentiometer while adding/removing a resistor—but I'm getting tripped up.
Any input would be appreciated!
Cheers
What would be the best architecture to accomplish this (i.e., inverting or non-inverting)? I think it should be possible to use one potentiometer while adding/removing a resistor—but I'm getting tripped up.
Any input would be appreciated!
Cheers