// multi-utility computation suite · offline · instant · precise
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eng.transistor-bias-point Calculator
Calculates DC bias point (Vce, Ic, Ib) for a BJT transistor in common-emitter configuration from supply voltage and resistor values. The bias point must be in the active region for linear amplification — the quiescent point is set to allow symmetric voltage swing without clipping.
Inputs
Vcc V
Electric potential difference (V). Drives current through a circuit. Household: 120 V (US) or 230 V (EU/UK).
R1 Kohm
Reference formula or conversion factor shown for context.
R2 Kohm
Reference formula or conversion factor shown for context.
Rc Kohm
Reference formula or conversion factor shown for context.
Re Kohm
Reference formula or conversion factor shown for context.
Beta
Reference formula or conversion factor shown for context.
Results
collector-emitter voltage VCE (V)
Electric potential difference between the two terminals (V). In AC systems, quoted as RMS — 230 V mains has a peak of ~325 V.
base voltage VB (V)
Electric potential difference between the two terminals (V). In AC systems, quoted as RMS — 230 V mains has a peak of ~325 V.
collector current IC (mA)
Electric charge flow rate (A). Governs wire sizing — too much current causes dangerous heating. Fuses protect circuits from overcurrent.
operating point
A standardised quality or risk rating on the applicable scale.
voltage divider bias
Electric potential difference between the two terminals (V). In AC systems, quoted as RMS — 230 V mains has a peak of ~325 V.