Difference between BJT and Mosfet


BJT (Bipolar Junction Transistor) and Mosfet (Metal oxide semiconductor field effect transistor) are both commonly used for amplification and switching applications. But they still have some significantly different propertites.


BJT Mosfet
Type PNP or NPN N-type or P-Type
Device Current Controlled Device Voltage Controlled Device
Output controlled By controlling base current By controlling gate voltage
Temperature coefficient Negative temperature coefficient Positive temperature coefficient
Input Impedance Low High
Switching Frequency Low High
Preferred Low Current Application Hight Power Application