Electrical & Electronics

BJT Bias & Operating Point Calculator

Calculate NPN/PNP bias currents, voltages and operating region, with a DC load line.

01

Your inputs

Currents are magnitudes; voltages use ground reference. Constant VBE and beta, approximate saturation; no leakage, temperature or Early effect. The load line holds the calculated base current fixed.

02

Your results

IC
—
VCE
—
IB
—
IE
—
VB
—
VC
—
VE
—
Estimated transistor dissipation
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DC load line and operating point
Formula—

How to use this tool

  1. Transistor type: NPN / PNP.
  2. Bias circuit: Voltage-divider bias / Fixed base bias.
  3. Formula · Print results.