What is the prime difference between a BJT and a FET?
What is the prime difference between a BJT and a FET?
Difference between BJT and FET
| BJT | FET |
|---|---|
| Its base terminal is negative with respect to the emitter terminal. | Its gate terminal is more negative with respect to the source terminal. |
| It has a high voltage gain | It has a low voltage gain |
| It has a less current gain | It has a high current gain |
Are BJTs faster than FETs?
BJT can switch faster than MOSFET due to the less capacitance at the control pin. However MOSFET is more tolerant to heat (stable to thermal changes) and can simulate a good resistor.” So, to answer your question, a “BJT can switch faster than MOSFET due to [there being] less capacitance at the control pin.”
Why are the FETs considered better than the BJTs?
FETs offer greater input impedance than BJTs. This means that they practically draw no current and therefore do not load down the power circuit that’s feeding it. BJTs offer greater gain at the output than FETs. The gain (or transconductance) of FETs are smaller than for BJTs.
What are the advantages of FET over BJT?
FETs are more temperature stable than BJTs. FETs are generally easier to fabricate than BJTs. Greater numbers of devices can be fabricated on a single chip (i.e., increased packing density is possible). FETs react like voltage-controlled variable resistors for small values of drain-to-source voltage.
What are few similarities or differences between BJTs and MOSFETs?
A BJT has three terminals namely base, emitter, and collector, while a MOSFET has three terminals namely source, drain, and gate. BJT’s are used for low current applications, whereas MOSFET is used for high power applications.
What are the similarities between BJT and FET?
A BJT or FET both shares the same category of transistors. These transistors have the property of both conduction as well as insulation. BJT, as well as FET, consists of three basic terminals in it. These transistors are found everywhere as the basic components of electronic systems.
What are the advantages of FETs over BJTs name at least three 3?
What is the main advantage of FET over BJT which makes it more useful in industrial applications?
What is the main advantage of FET which makes it more useful in industrial applications? Explanation: Because of its small size, the IC chips can be made even smaller which reduces the wear and tear.
What is the main difference between BJT and JFET?
The key difference between BJT and JFET is that BJT is a device in which output current is controlled by the base current. On the contrary, JFET is a device whose output current is controlled by the input voltage applied to it.
What are the similarities and differences between BJTs and MOSFETs?
While both have three terminals, these differ. The MOSFET has a source, drain, and gate whereas the BJT has a base, emitter, and collector.
What is the difference between FETs and BJTs?
Smaller devices, many times, can be more convenient, consumer-friendly, and FETs allow this. BJTs, on the other hand, require larger sizes generally than FETs. In terms of expense, FETs, especially MOFSFETs, are more expensive to manufacture than BJTs. FETs normally are at a higher price point, but not significant enough to push away from them.
Why do BJT transistors produce more gain than FETs?
The transconductance of FETs is much lower. So if you use the same amount of power at the input for both a BJT and FET transistor, the BJT transistor will produce more gain. This is why BJTs are more popular for amplifier circuits. They produce gain than a FET can.
Why is the input impedance of BJT higher than that of FET?
The input circuit of BJT is forward biased. So BJT has low input impedance. The input circuit of FET is reverse biased. So FET exhibits much higher input impedance (>100Mohms) and lower output impedance. As they have high degree of isolation between input and output, FET acts as a buffer amplifier.
Why are FET transistors preferred over other types of transistors?
When it comes to consumer products, FETs are overwhelmingly preferred due to size, high input impedance, as well as other factors. Intel, one of the largest chip makers in the world, uses practically only FET transistors to build its chips which power billions of devices in the world.
https://www.youtube.com/watch?v=_6dlJ-0jXrw
