Table of Contents
- 1 What is the difference between BJT and CMOS?
- 2 What is the main difference between mosfet and BJT in terms of IV characteristics?
- 3 Why we use MOSFET instead of BJT?
- 4 What is a MOSFET diode?
- 5 What is the main advantage of MOSFET over BJT?
- 6 What is the difference between the two types of MOSFET?
- 7 What is the difference between a bipolar junction transistor and MOSFET?
- 8 What is the gate current of a MOSFET?
What is the difference between BJT and CMOS?
BJT is a bipolar device i.e. current produced in it is a result of two carries whereas CMOS is unipolar device, due to the presence of two type of current carries in BJT it produces more noise and makes it less stable.
What is the main difference between mosfet and BJT in terms of IV characteristics?
Differences between BJT and MOSFET
| BJT | MOSFET |
|---|---|
| The input impedance is low | The input impedance is high |
| The switching frequency of BJT is low | The switching frequency of MOSFET is high |
| It is used for the low current application | It is used for the high current application |
Is Mosfet a diode?
MOSFETs, whether SiC-MOSFETs or otherwise, have a body diode between the drain and the source, as indicated in the diagram. As a consequence of the MOSFET structure, the body diode is formed by the pn junction between the source and drain, and is also called a parasitic diode or an internal diode.
Why we use MOSFET instead of BJT?
Mosfet provides very good isolation between Gate and other two terminals as compared to BJT. Mosfet can handle more power as compared to BJT. Mosfet has very low switiching power loss and high speed. Voltage signals can easily operate a MOSFET hence it is used in many digital circuits.
What is a MOSFET diode?
Why does a MOSFET have a diode?
These MOSFETs have diodes in them pointing from the body to the drain and source. The body to source diode is usually irrelevant, because it is shorted out by an internal body to source connection. Current typically flows from the drain to the source in N-channel FET applications because of the body diode polarity.
What is the main advantage of MOSFET over BJT?
Mosfet provides a very good isolation between the gate and the other two terminals compared to bjt. MOSFET can handle more power compared to BJT. The mosfet has a very low power loss and a high speed. Voltage signals can easily operate a mosfet, so it is used in many digital circuits.
What is the difference between the two types of MOSFET?
There are two classes of MOSFETs. There is depletion mode and there is enhancement mode. Each class is available as n- or a p-channel, giving a total of four types of MOSFETs. Depletion mode comes in an N or a P and an enhancement mode comes in an N or a P.
What is the difference between ON/OFF operation of BJT and MOSFET?
Explanation of the differences between ON/OFF operation of BJT and MOSFET. (1) Base current of BJT starts flowing when base voltage increases, and collector current is in proportion to this base current. This flow starts at about 0.7 V.
What is the difference between a bipolar junction transistor and MOSFET?
A bipolar junction transistor includes a stable saturation voltage drop like 0.7 V, whereas the MOSFET includes a 0.001-ohm on-resistance that leads to fewer power losses. A bipolar junction transistor uses a low base current for operating a larger collector current. And they perform like a current amplifier.
What is the gate current of a MOSFET?
The MOSFET is a voltage-controlled device and it doesn’t include gate current almost. The gate works like a value capacitor and it is a significant benefit in the applications of switching & high current because the gain of the power BJTs has medium to low, that needs high base currents to produce high currents.
How does a BJT transistor work?
Fundamentally, the operation of a BJT transistor is determined by the current at the base terminal. This transistor consist of three terminals namely the emitter, base and collector. Actually, a BJT is a silicon piece includes three regions and two junctions.