Base Current using Current Amplification Factor Calculator

Formula

The formula to calculate the Base Current is:

\[ I_b = I_e \cdot (1 - \alpha) - I_{cbo} \]

Definition

Base Current is the current flowing through the base terminal of a bipolar junction transistor. Base current is typically 1% of emitter or collector current for small signal transistors.

Example Calculation

Let's assume the following values:

Emitter Current (Ie) = 0.00275 A
Current Amplification Factor (α) = 0.714
Collector Base Leakage Current (Icbo) = 0.00034 A

Using the formula:

\[ I_b = 0.00275 \cdot (1 - 0.714) - 0.00034 = 0.0004465 \text{ A} \]

Conversion Chart

Emitter Current (Ie)	Current Amplification Factor (α)	Collector Base Leakage Current (Icbo)	Base Current (Ib)
0.002 A	0.714	0.00034 A	0.000232000000 A
0.0021 A	0.714	0.00034 A	0.000260600000 A
0.0022 A	0.714	0.00034 A	0.000289200000 A
0.0023 A	0.714	0.00034 A	0.000317800000 A
0.0024 A	0.714	0.00034 A	0.000346400000 A
0.0025 A	0.714	0.00034 A	0.000375000000 A
0.0026 A	0.714	0.00034 A	0.000403600000 A
0.0027 A	0.714	0.00034 A	0.000432200000 A
0.0028 A	0.714	0.00034 A	0.000460800000 A
0.0029 A	0.714	0.00034 A	0.000489400000 A
0.003 A	0.714	0.00034 A	0.000518000000 A