I need to design an electret condenser microphone (ECM) pre-amplifier by using CMOS process. And I've few opamp designs on the same process,too. Can anyone offer any good reference to design the whole structure and interface ?
I mean, like how to buffer the input signal from mic, the input capacitance of my amplifier, where to build the high pass filtering etc ...
A.C. van der Woerd and W.A. Serdijn: Low-voltage low-power controllable preamplifier for electret microphones, IEEE Journal of Solid-State Circuits, Vol. 28, No. 10, pp. 1052-1055, October 1993.