I’m experiencing brief audible oscillation upon applying power to LM386 headphone amp circuits. Is adding a common emitter stage with a large cap from base to ground before the output a good way to introduce a time delay before audio is output once power is introduced?
It’s part of an active low pass filter that performs a band pass anti aliasing function.
Given those cap options, I’d use the 220pF. If it’s performing okay and you’re not getting any clock artifacts, you could be fine with the 100pF.
It’s absolutely still funny looking. That poor thing looks like it has conjunctivitis and a black eye.
But, I am glad that that goof is getting some pals to hang with.
What are you biasing the input to? Vref from a voltage divider? I’d probably want to add a cap to ground in series with R1 to avoid problems with DC offset, but, otherwise, that’s fine.