Common Emitter Amplifier and Transistor AmplifiersBasic The Base of the transistor used in a common emitter amplifier is biased using two resistors as a potential divider network. This type of biasing arrangement is commonly used in the design of bipolar transistor amplifier circuits and greatly reduces the effects of varying Beta, ( β) by holding the Base bias at a constant steady voltage. This type of biasing produces the greatest stability.JFET Amplifier · 11. Transistor Biasing Electronics Software - 101science Download TUNING Does stub and L,C matching of loads on transmission lines. RFsim99 linear simulator from the UK. RFSim99 is a free linear S-parameter based circuit simulator offering schematic capture, simulation, 1 port and 2 port S-parameter display and file support, tolerance analysis, stability circles, and much more.