Hey,
Im working on a summing amplifier for a small course project.
It will be summing ~26 signals coming from oscillators. All oscillator outputs will be the same voltage input (5v), but different frequencies.
What I want to do is have a constant voltage out of the summing amplifier, say 5v. However, not all oscillators will be outputting a voltage at all times, they're essentially notes.
So, my issue is that I can vary the gain of the summing amplifier to achieve this constant voltage out, but Ill have to change the gain every time I change the number of active oscillators. I could just clip the voltage, but then Ill lose those high peaks.
I was wondering if there is a configuration that can detect an active input and change the gain accordingly?
Cheers
NOTE: As per the design specs, I cant use digital circuitry (unfortunately)
Im working on a summing amplifier for a small course project.
It will be summing ~26 signals coming from oscillators. All oscillator outputs will be the same voltage input (5v), but different frequencies.
What I want to do is have a constant voltage out of the summing amplifier, say 5v. However, not all oscillators will be outputting a voltage at all times, they're essentially notes.
So, my issue is that I can vary the gain of the summing amplifier to achieve this constant voltage out, but Ill have to change the gain every time I change the number of active oscillators. I could just clip the voltage, but then Ill lose those high peaks.
I was wondering if there is a configuration that can detect an active input and change the gain accordingly?
Cheers
NOTE: As per the design specs, I cant use digital circuitry (unfortunately)