A 25 mVpp applied to the input of this circuit produces in the output a 1 Vpp signal. The preamplifier uses two common NPN transistor and is powered from a 18 V power supply. This project can be used with low signal transducers as microphones and sensors. Care must be taken with connectors to avoid hum and interference. In the simulation with the MultiSIM BLUE we applied a 1 kHz sine signal to the input. Observe the adjustments of the oscilloscope and function generator.
To download the simulation files and Netlist - click here (msb0023.zip)
