Where are BJT transistors used?
The main basic function of a BJT is to amplify current it will allow BJTs are used as amplifiers or switches to produce wide applicability in electronic equipment include mobile phones, industrial control, television, and radio transmitters. There are two different types of BJTs are available, they are NPN and PNP.
How does BJT amplify?
A bipolar junction transistor (BJT) amplifies the base-emitter current into the collector-emitter current, so it’s a current-controlled current-source. It can come in NPN or PNP variants, for which the current directions are different. This means that you have the freedom to alter the current in any transistor circuit.
How is BJT used as a voltage amplifier?
The three terminals of the BJT are the base, the collector and the emitter. A BJT is a type of transistor that uses both electrons and holes as charge carriers. A signal of small amplitude if applied to the base is available in the amplified form at the collector of the transistor. This is the amplification provided by the BJT.
What is the difference between MOSFET and BJT?
The BJT is a bipolar junction transistor whereas MOSFET is a metal oxide semiconductor field effect transistor. BJT’s are used for low current applications, whereas MOSFET is used for high power applications. The BJT is a current controlled device and MOSFET is a voltage controlled device.
Why is MOSFET better than BJT?
BJTs are much more suitable than MOSFETs for driving low-power LEDs and similar devices from MCUs. MOSFETs are better for high-power applications because they can switch faster than BJTs, enabling them to use smaller inductors in switch-mode supplies, which increases efficiency.
What are advantages of a BJT amplifier?
The BJT has a large gain bandwidth.