Transistor parameters

A transistor’s parameters represent its electrical properites. Engineers employ transistor parameters in production-line testing and circuit design. A group of a transistor’s parameters sufficient to predict circuit gain, input impedance, and output impedance is also refered to as its small-signal model.

Two-by-two parameter matricies receive designations such as

• T parameters,
• h-parameters,
• z (impedance) parameters,
• y (admittance) parameters, and
• s (scattering parameters).

Also see

• Transistor Models
• Two-port network
• Bipolar junction transistor#Theory and modelling