Bipolar Junction Transistors
The quantity gm= IC/VT is known as the TRANSCONDUCTANCE of the transistor. • LINEARITY Include higher order terms from Equation 1.5: vout ≈ - Rc gm [ vin + vin 2/2 V T + . . . . ] Ratio of unwanted quadratic term to linear term is vin/2VT, so expect 10 % distortion when vin/2VT ≈ 0.1, or vin ≈ 5 mV.