Hello,
I'm trying to come up with an automatic gain control circuit that can norma lize a 50Hz sine wave of varying amplitude (50mV to 5V), to an output of th e same sine wave but with an amplitude of 4.8V. (I'm looking at a max of 1k Hz)
My first thought is to try a voltage controlled amplifier with a peak detec tor used in it's feedback circuit, the peak detector would feed an op-amp w ith a 4.8V reference that represents the highest peak output I would like a nd that op-amp would adjust the voltage controlled amplifier until that pea k voltage is reached.
I'm trying to simulate this using TI's VCA810, but I haven't been able to g et it to work.
Can anyone recommend a a circuit to achieve this AGC design? Does my approa ch make sense?
much thanks!