I am trying to make a clap on switch and have the following schematic.
The dotted box is the electret condenser microphone. I set this up as the first stage for the amplifier design. I would like to fully understand this before moving on to the next stage. The circuit works but I am more eager to understand it, not just set it up and watch it work.
First question: What does the FET impedance converter do?
I have researched and understand that the diaphragm or the back plate is polarized to eliminate an internal voltage source. I understand that the change in capacitance results in a change in voltage. But I do not understand the schematic for this microphone. Specifically what the FET impedance converter does.
Second question: What is the other component inside the microphone?
I read that the other component inside the microphone is a dc current blocking capacitor.