sTransistor

sTransistor is a utility to aid in biasing transistor amplifiers. It enables the user to switch between nine of the most common bipolar transistor bias schemes and then calculate a resistor network to support the desired bias state. In addition, sTransistor supports analysis, in which the resistor network is given and the bias state is determined. The transistor small signal model conditions are shown and can be changed. In addition to the transistor bias, an unbalanced attenuator utility is provided to calculate custom Pi and "T" attenuators for padding signals for a given input and output resistance.