How to Calculate the Collector Current, Ic, of a Transistor
The collector current, Ic, of a transistor is the amplified output current of a bipolar junction transistor.
There are several ways to find the collector current, Ic, of a transistor. And it all depends on what information is already known about the transistor:
1st Way to Calculate Collector Current Ic
Using Known Values
If the base current, Ib, and β are known, then Ic can be computed by the following formula:
Example
If Ib=35μa and β=100, then Ic calculates out to be:
2nd Way to Calculate Collector Current Ic
Using Known Values
If the emitter current, Ie, and β are known, then Ic can be computed by the following formula:
Example
If Ie=4ma and β=150, then the value of Ic is computed to be:
3rd Way to Calculate Collector Current Ic
Using Known Values
If base current, Ib, and emitter current, Ie, are known, then Ic can be calculated by the formula:
Example
If Ie=4ma and Ib=30μa, then Ic calculates out to be:
Related Resources
How to Calculate the Base Current IB of a BJT Transistor
How to Calculate the Emitter Current IF of a BJT Transistor
How to Calculate β of a BJT Transistor
How to Calculate α of a BJT Transistor
How to Calculate VBB of a BJT Transistor
How to Calculate VCE of a BJT Transistor
How to Calculate Vπ of a BJT Transistor
How to Calculate Rπ of a BJT Transistor
How to Calculate GmVπ of a BJT Transistor Circuit
How to Calculate GM of a BJT Transistor
What is Open Collector Output (of a BJT Transistor)?