This circuit is indicated to operation with low intensity sources such as electret microphones and dynamic microphones. The gain is given by R1. Trhis resistor is choosen according the amplitude of the signal source. In the simulation we used a 3 mV x 1 kHz source having in the output a 2.5 Vpp signal.
Download the simulation files and Netlist - click here (msb0062.zip)