Originally Posted by Pramod Kumar
Hi Tim, Thanks for the circuit. As I mentioned earlier, I have already constructed some preamps using the circuit at Simple Stereo Electret Mic Preamp which is very similar to your circuit. I have used National Semiconductor's LM4562 which has very low noise. BTW, what is an "AOT" capacitor? I have not provided this cap in my preamp without any apparent adverse effect.
The LM4562 is a decent device, but I mentioned the low voltage single rail devices because they are designed for single rail, and also designed to work good at low voltage (
), which means maximizing headroom. They should perfrom much better than the THAT chip in this app.
There is an amazing selection at the Texas website, and you can order free samples.