Very low voltage amplifier, with simulated gain of X150. Maximum input is very limited, preferably below 2mV peak (1.41mV RMS ) to prevent distortion.
I build this circuit today (7thJuly2017) and was impressed with a gain of x140 at 1 kHz, haven't yet tested it over a wider range of test frequencies. With a 3rd stage ( not down here ) working on 2.4V I was able to get close to x1000!
