Calculadora de Polarización de Transistor — Fórmula
## BJT Transistor Biasing
In common-emitter configuration a base resistor sets the operating point.
### Formula
**I_B = I_C / hFE**
**R_B = (Vcc - V_BE) / I_B**
Where hFE is DC current gain and V_BE is typically 0.7 V for silicon. This simple bias is beta-dependent; voltage divider bias provides better stability.
In common-emitter configuration a base resistor sets the operating point.
### Formula
**I_B = I_C / hFE**
**R_B = (Vcc - V_BE) / I_B**
Where hFE is DC current gain and V_BE is typically 0.7 V for silicon. This simple bias is beta-dependent; voltage divider bias provides better stability.
Ejemplo Resuelto
Bias a transistor with hFE=100 for 10 mA collector current from 12 V.
- I_B = 10 mA / 100 = 0.1 mA = 100 uA
- R_B = (12 - 0.7) / 0.0001 = 113,000 ohms (113k)
- Power = 12 x 10 = 120 mW