Transistor Biasing Calculator
Free calculate transistor biasing parameters for voltage divider bias circuits. determine resistor values for proper transistor operation.
Input Parameters
Si: 0.7V, Ge: 0.3V
Results
Enter parameters to calculate bias resistors
Transistor Biasing Formulas
Collector Resistor
Rc = (Vcc - Vce - Ve) / Ic
Where Ve = emitter voltage
Base Current
Ib = Ic / β
From current gain
Voltage Divider
Vb = Vbe + Ve
R2 = Vb / (10 × Ib)
R1 = (Vcc - Vb) / (11 × Ib)
Rule of thumb: I2 ≈ 10 × Ib
Emitter Resistor
Re = Ve / Ie
Where Ie ≈ Ic (for large β)