* <math>\scriptstyle I_\text{C} \,</math> is the [[Quiescent current|quiescent]] collector current (also called the collector bias or DC collector current)
* <math>\scriptstyle V_\text{T} ~=~ \frac{kT}{qe}</math> is the ''[[Boltzmann constant#Role in semiconductor physics: the thermal voltage|thermal voltage]]'', calculated from [[Boltzmann's constant]] <math>\scriptstyle k</math>, the [[elementary charge|charge of an electron]] <math>\scriptstyle qe</math>, and the transistor temperature in [[kelvin]]s, <math>\scriptstyle T</math>. At approximately [[room temperature]] (295{{space}}K, 22{{space}}°C or 71{{space}}°F), <math>\scriptstyle V_\text{T}</math> is about 25 mV.
