This document compares PSpice and LTspice simulations of BJT circuits. It examines the hFE characteristic of a BJT by varying the input current from 10mA to 10A and measuring the ratio of output to input current. It also examines the output characteristic of a BJT by varying the input voltage from 0V to 5V and measuring the output collector current, which increases linearly from 0A to 2.4mA over that range. The document provides circuit schematics and output graphs to demonstrate the simulations in PSpice and LTspice.