Discuss
menu
search
person
Login
Register
search
edit
Ask a Question
Discuss
All Activity
Q&A
Questions
Hot!
Unanswered
Tags
Ask a Question
why igbt is used instead of bjt and mosfet?
Speak Question
asked
Sep 13, 2017
by
anonymous
igbt
bjt
mosfet
thumb_up_alt
1
like
thumb_down_alt
0
dislike
109
views
Please
log in
or
register
to add a comment.
Please
log in
or
register
to answer this question.
1
Answer
Speak Answer
answered
Sep 22, 2017
by
anonymous
ON state losses of IGBT is less as compared to MOSFET and BJT.
thumb_up_alt
0
like
thumb_down_alt
0
dislike
Please
log in
or
register
to add a comment.
← Prev Question
Next Question →
Related questions
asked
Sep 15, 2017
by
anonymous
why IGBT is preferred as a power switch over both power BJT and MOSFET?
Last answer:
Because it has a higher switching frequency and heat tolerance.
igbt
bjt
mosfet
power
switch
thumb_up_alt
1
like
thumb_down_alt
0
dislike
110
views
1
answer
asked
Apr 28, 2018
by
anonymous
Which phenomenon is present in thyristors but absent in BJT, MOSFET and IGBT ?
Which phenomenon is present in thyristors but absent in BJT, MOSFET and IGBT ? (A) forward conduction (B) latching (C) forward blocking (D) reverse breakdown
Last answer:
Which phenomenon is present in thyristors but absent in BJT, MOSFET and IGBT ? (A) forward conduction (B) latching (C) forward blocking (D) reverse breakdown
thyristors
bjt
mosfet
igbt
thumb_up_alt
0
like
thumb_down_alt
0
dislike
3.0k
views
1
answer
asked
Nov 10, 2017
by
anonymous
Compare BJT, MOSFET and IGBT .
Compare BJT, MOSFET and IGBT .
Last answer:
BJT MOSFET IGBT BJT is a current controlled device. MOSFET is a voltage controlled device. IGBT is a voltage controlled device. The input impedance of BJT is low. ... is minority carrier device. MOSFET is majority carrier device. IGBT is minority carrier device.
compare
bjt
mosfet
igbt
thumb_up_alt
1
like
thumb_down_alt
0
dislike
352
views
1
answer
asked
Sep 29, 2017
by
anonymous
is IGBT costlier than BJT and MOSFET?
Last answer:
Yes IGBT is costlier than BJT and MOSFET.
igbt
bjt
mosfet
thumb_up_alt
0
like
thumb_down_alt
0
dislike
2.6k
views
1
answer
asked
Feb 6, 2018
by
anonymous
Explain the formation of parasitic BJT and parasitic diode in Power MOSFET.
Explain the formation of parasitic BJT and parasitic diode in Power MOSFET. Can parasitic diode be used in same power electronics applications?
Last answer:
Parasitic Diode: The parasitic diode is in between drain and source. The MOSFET structure itself contains parasitic diode or body drain diode. This parasitic diode allows the reverse flow of current when the ... of MOSFET as a BJT collector. Parasitic BJT operates in the cut-off region.
parasitic
diode
bjt
power
mosfet
thumb_up_alt
1
like
thumb_down_alt
0
dislike
2.4k
views
1
answer
asked
Feb 3, 2018
by
anonymous
Operating frequency of power MOSFET is higher than that of power BJT. Justify the statement.
Operating frequency of power MOSFET is higher than that of power BJT. Justify the statement.
Last answer:
Power MOSFET have high turning on and turning off capability high switching speed of MOSFET is due to the high rate of change of drain voltage. The switching losses of power MOSFET ... lower frequency. Hence, operating frequency of power MOSFET is higher than that of power BJT.
mosfet
bjt
frequency
operating
thumb_up_alt
2
like
thumb_down_alt
0
dislike
700
views
1
answer
asked
Mar 19, 2018
by
anonymous
Is the input impedance of MOSFET more than BJT and FET?
Is the input impedance of MOSFET more than BJT and FET?
Last answer:
Yes, the input impedance of MOSFET more than BJT and FET.
input
impedance
mosfet
bjt
fet
thumb_up_alt
0
like
thumb_down_alt
0
dislike
297
views
1
answer
asked
Sep 13, 2017
by
anonymous
why igbt is used in vfd?
Last answer:
IGBT or Insulated Gate Bi-polar Transistors are typically semiconductor devices aka. controlled switches, which find their applications in Power Electronics circuits such as Inverters, and electrical ... ( buy implementing suitable Pulse Width Modulation scheme ) * Lower cost
igbt
vfd
thumb_up_alt
0
like
thumb_down_alt
0
dislike
72
views
1
answer
asked
Sep 13, 2017
by
anonymous
why igbt is bipolar?
Last answer:
IGBT is a bipolar device because current is carried by both holes and electrons.
igbt
bipolar
thumb_up_alt
1
like
thumb_down_alt
0
dislike
114
views
1
answer
asked
Sep 10, 2017
by
anonymous
why mosfet is used for high frequency?
Last answer:
MOSFET provides better efficiency at high frequency and its high speed switching losses are less hence MOSFET is used for high frequency.
high
frequency
mosfet
thumb_up_alt
1
like
thumb_down_alt
0
dislike
98
views
1
answer
asked
Sep 15, 2017
by
anonymous
Explain the series and parallel operation of MOSFET. Which is suitable and why ?
Explain the series and parallel operation of MOSFET. Which is suitable and why?
Last answer:
Series operation of MOSFET: To increase voltage handling capability MOSFETs are connected in series. When the MOSFETs are connected in series each MOSFET should turn on and turn off ... on and turn off time and transconductance. Each MOSFET should share current equally.
mosfet
series
parallel
operation
thumb_up_alt
1
like
thumb_down_alt
0
dislike
440
views
1
answer
asked
Sep 10, 2017
by
anonymous
why mosfet is voltage controlled device?
Last answer:
already answered here is mosfet current controlled device?
mosfet
voltage
controlled
device
thumb_up_alt
1
like
thumb_down_alt
0
dislike
126
views
1
answer
asked
Dec 7, 2017
by
anonymous
parallel operation of mosfet can be done more easily as compared to thyristor. why?
parallel operation of MOSFET can be done more easily as compared to thyristor. why?
Last answer:
Parallel operation of MOSFET can be done more easily as compared to thyristor because the resistance of MOSFET is increases with increase in temperature. MOSFET have the positive temperature coefficient. In ... the parallel operation of MOSFET can be done more easily as compared to the thyristor.
mosfet
thyristor
parallel
operation
thumb_up_alt
2
like
thumb_down_alt
0
dislike
264
views
1
answer
asked
Sep 13, 2017
by
anonymous
is igbt current controlled device ?
Last answer:
No, IGBT is not the current controlled device. IGBT is a voltage controlled device. IGBT have combine qualities of MOSFET and BJT. The high switching speed of MOSFET and low conduction losses of BJT. Also, IGBT which stands for Insulated Gate Bipolar Transistor have high input impedance.
igbt
current
controlled
device
thumb_up_alt
1
like
thumb_down_alt
0
dislike
132
views
1
answer
asked
Sep 13, 2017
by
anonymous
igbt is unipolar or bipolar?
Last answer:
IGBT is a bipolar device.
igbt
bipolar
unipolar
thumb_up_alt
1
like
thumb_down_alt
0
dislike
245
views
1
answer
asked
May 21, 2020
by
anonymous
Describe with neat sketch the constructional details of IGBT.
Describe with neat sketch the constructional details of IGBT.
Last answer:
Construction: Insulated gate bipolar transistor or IGBT, is a solid state devices primarily used as an electronic switch which, as it was developed, came to combine high efficiency and fast ... layer and p+ emitter constitute a BJT with a wide base region and hence small current gain.
constructional
details
igbt
thumb_up_alt
0
like
thumb_down_alt
0
dislike
96
views
1
answer
asked
Oct 13, 2019
by
anonymous
Draw construction of IGBT.
Draw construction of IGBT.
Last answer:
construction of IGBT
construction
igbt
thumb_up_alt
0
like
thumb_down_alt
0
dislike
267
views
1
answer
asked
Sep 15, 2017
by
anonymous
explain the parallel operation of IGBT?
Also, highlight the problem faced during parallel operation.
Last answer:
Parallel operation of IGBT: Parallel operation of IGBT is done for obtaining high current rating. Paralleling of IGBT reduces conduction losses and thermal stress. IGBT combines the qualities of ... . IGBTs must share losses equally otherwise IGBT may get failure due to thermal differences.
parallel
operation
igbt
thumb_up_alt
1
like
thumb_down_alt
0
dislike
194
views
1
answer
asked
Sep 15, 2017
by
anonymous
Justify the statement. IGBT uses a vertically oriented structure.
Justify the statements. 1. IGBT uses a vertically oriented structure. 2. IGBT is preferred as a power switch over both power BJT and MOSFET. 3. Punch through IGBT structure are more popular and are widely used.
Last answer:
1. IGBT uses vertically oriented structure. IGBT use vertically oriented structure to reduce the resistance and to increase the current flow area. Hence IGBT uses vertically oriented ... DC circuit applications. Hence punch through IGBT structure are more popular and are widely used.
igbt
vertically
oriented
structure
thumb_up_alt
1
like
thumb_down_alt
0
dislike
2.9k
views
1
answer
asked
Sep 22, 2017
by
anonymous
Why MOSFET is used for low power applications?
Last answer:
MOSFET have high current losses due to High on state resistance. Hence MOSFET is used for low power applications.
mosfet
applications
low
power
thumb_up_alt
0
like
thumb_down_alt
0
dislike
78
views
1
answer
asked
Feb 20, 2018
by
anonymous
What is the difference between beta and forced beta for BJT?
What is the difference between beta and forced beta for BJT?
difference
between
bjt
beta
forced
thumb_up_alt
0
like
thumb_down_alt
0
dislike
519
views
0
answers
asked
Jul 25, 2019
by
anonymous
Describe with neat sketch the construction and working principle of MOSFET.
Describe with neat sketch the construction and working principle of MOSFET.
Last answer:
Construction and working principle of MOSFET: A) Depletion type MOSFET: Construction: The N-channel depletion type MOSFET is formed on P-type silicon substrate with two heavily ... accumulation of electrons and hence more current. Thus the MOSFET is a gate voltage controlled device.
mosfet
thumb_up_alt
0
like
thumb_down_alt
0
dislike
2.6k
views
1
answer
asked
Feb 19, 2018
by
anonymous
Explain MOSFET gate drive circuit and totem pole configuration.
Explain MOSFET gate drive circuit and totem pole configuration.
Last answer:
MOSFET gate drive circuit: The turning on and turning off of MOSFET can be controlled from gate to source voltage signal. If the gate to source voltage of MOSFET exceeds threshold ... this configuration, the two switches (transistors) are used in totem pole arrangement with a comparator.
mosfet
gate
drive
circuit
totem
pole
configuration
thumb_up_alt
0
like
thumb_down_alt
0
dislike
269
views
1
answer
asked
Nov 14, 2017
by
anonymous
Explain difference between enhancement MOSFET and depletion type MOSFET.
Explain difference between enhancement MOSFET and depletion type MOSFET.
Last answer:
In enhancement MOSFET channel is not initially exists but in depletion MOSFET channel is already exists. In case of depletion MOSFET if the voltage is applied between drain and source the drain current will flow ... a channel. depletion MOSFET & enhancement MOSFET
depletion
mosfet
enhancement
thumb_up_alt
0
like
thumb_down_alt
0
dislike
346
views
1
answer
asked
Sep 10, 2017
by
anonymous
why bjt is called current controlled device?
Last answer:
In BJT there is movement of electrons and holes accros the junctions which is basicaly current flow.
controlled
current
bjt
thumb_up_alt
1
like
thumb_down_alt
0
dislike
299
views
2
answers
asked
Sep 22, 2017
by
anonymous
Why paralleling of mosfet is easier?
Last answer:
Because of positive temperature coefficient of mosfet the paralleling of mosfet is easier.
mosfet
paralleling
thumb_up_alt
0
like
thumb_down_alt
0
dislike
53
views
1
answer
asked
Mar 19, 2018
by
anonymous
Why Mosfet is called Mosfet?
Why Mosfet is called Mosfet?
mosfet
thumb_up_alt
0
like
thumb_down_alt
0
dislike
50
views
0
answers
asked
Feb 19, 2018
by
anonymous
Explain open emitter BJT drive circuit.
Explain open emitter BJT drive circuit.
Last answer:
open emitter BJT drive circuit:
open
emitter
bjt
drive
circuit
thumb_up_alt
0
like
thumb_down_alt
0
dislike
230
views
1
answer
asked
Sep 15, 2017
by
anonymous
Explain the on state losses in power BJT.
Explain the on state losses in power BJT.
Last answer:
On state losses in power BJT: Transistor have four types of losses one is turn on state losses second is turn off state losses third is turn on switching losses and fourth is turn ... ON = VCE sat x IC With increasing collector current collector to emitter saturation voltage increases.
bjt
on
state
losses
thumb_up_alt
2
like
thumb_down_alt
0
dislike
240
views
1
answer
asked
Apr 28, 2018
by
anonymous
The threshold voltage of an n- channel enhancement mode MOSFET is 0.5V when the device is biased at
The threshold voltage of an n- channel enhancement mode MOSFET is 0.5V when the device is biased at a gate voltage of 3V. Pinch off would be occurs at a drain voltage of (A) 1.5V (B) 2.5V (C) 3.5V (D) 4.5V
Last answer:
The threshold voltage of an n- channel enhancement mode MOSFET is 0.5V when the device is biased at a gate voltage of 3V. Pinch off would be occurs at a drain voltage of 2.5V
threshold
voltage
n-
channel
enhancement
mode
mosfet
thumb_up_alt
0
like
thumb_down_alt
0
dislike
112
views
1
answer
asked
Feb 2, 2018
by
anonymous
Justify the statement. Antiparallel diode is connected across MOSFET.
Justify the statement. Antiparallel diode is connected across MOSFET.
Last answer:
In MOSFET current is flow from drain to source but when the load is inductive the current may flow in opposite direction. To avoid the opposite flow of current and to protect MOSFET the antiparallel diode is connected across MOSFET.
antiparallel
diode
mosfet
thumb_up_alt
1
like
thumb_down_alt
0
dislike
127
views
1
answer
asked
Dec 7, 2017
by
anonymous
Justify. Power MOSFET is operated at high enough gate source voltage to minimize the conduction losses.
Justify. Power MOSFET is operated at high enough gate source voltage to minimize the conduction losses.
Last answer:
MOSFET is metal oxide field effect transistor. MOSFET is a voltage controlled device. MOSFET is majority carrier device. MOSFET are of two one is n-channel MOSFET and p-channel MOSFET. Gate, ... . Hence, power MOSFET is operated at high enough gate-source voltage to minimize the conduction losses.
mosfet
power
gate
source
voltage
thumb_up_alt
2
like
thumb_down_alt
0
dislike
753
views
1
answer
asked
Sep 15, 2017
by
anonymous
what is depletion type MOSFET?
What is depletion type MOSFET?..........
Last answer:
Depletion MOSFET: Depletion MOSFET is a MOSFET in which the channel already exists. If we apply a voltage between drain and source then the drain current will flow even if the gate to source ... in figure. The drain current will be reduced as the gate to source voltage made more negative.
depletion
type
mosfet
thumb_up_alt
1
like
thumb_down_alt
0
dislike
134
views
1
answer
asked
Sep 15, 2017
by
anonymous
what is enhancement MOSFET?
What is enhancement MOSFET?...............
Last answer:
Enhancement MOSFET: There are two types of MOSFET one is enhancement MOSFET and second is depletion MOSFET. In enhancement MOSFET channel is created by applying threshold voltage between gate and source ... mode. The enhancement MOSFET will not conduct if the gate to source voltage is zero.
mosfet
enhancement
thumb_up_alt
1
like
thumb_down_alt
0
dislike
140
views
1
answer
asked
Sep 10, 2017
by
anonymous
is mosfet current controlled device?
Last answer:
No, MOSFET is not the curent controlled device. The current between drain and source which is drain current is controlled by applying a voltage between gate and source hence MOSFET is a voltage controlled device.
mosfet
thumb_up_alt
1
like
thumb_down_alt
0
dislike
168
views
1
answer
asked
Jun 18, 2018
by
anonymous
The number of terminals present in IGBT is
The number of terminals present in IGBT is A) 2 B) 3 C) 4 D) 5
Last answer:
The number of terminals present in IGBT is 3
number
terminals
igbt
thumb_up_alt
0
like
thumb_down_alt
0
dislike
67
views
1
answer
asked
Jul 25, 2019
by
anonymous
State the applications of MOSFET
State the applications of MOSFET
Last answer:
Applications of MOSFET: i) Switching-mode-power-supplies (SMPS) and linear power supplies. ii) Brushless DC motor drives iii) Solid state DC relay iv) Automobile applications v) Stepper motor controller vi) Lighting controls vii) Solenoid drivers viii) Robotics ix) Induction heating
mosfet
thumb_up_alt
0
like
thumb_down_alt
0
dislike
53
views
1
answer
asked
Mar 10, 2018
by
anonymous
Explain switching model of MOSFET.
Explain switching model of MOSFET.
switching
model
mosfet
thumb_up_alt
0
like
thumb_down_alt
0
dislike
62
views
0
answers
asked
Oct 13, 2019
by
anonymous
Give the applications of IGBT
Give the applications of IGBT
Last answer:
1) AC and DC motor drives 2) SMPS 3) Inverters 4) Choppers 5) Solid-state Relays 6) solid-state Contactors
applications
igbt
thumb_up_alt
0
like
thumb_down_alt
0
dislike
53
views
1
answer
asked
Mar 19, 2018
by
anonymous
How can BJT be used as an amplifier?
How can BJT be used as an amplifier?
bjt
used
amplifier
thumb_up_alt
0
like
thumb_down_alt
0
dislike
68
views
0
answers
asked
Sep 10, 2017
by
anonymous
what are bjt amplifiers used for?
Last answer:
Transformer coupled amplifiers Direct coupled amplifiers Multistage amplifiers Darlington amplifiers Emmiter follower
bjt
amplifiers
used
thumb_up_alt
1
like
thumb_down_alt
0
dislike
70
views
1
answer
asked
Jun 18, 2018
by
anonymous
If the base current of a BJT is 250 µA and emitter current is 15 mA, then the common base current gain will be
If the base current of a BJT is 250 µA and emitter current is 15 mA, then the common base current gain will be A) 0.98 B) 0.41 C) 59 D) 55
Last answer:
If the base current of a BJT is 250 µA and emitter current is 15 mA, then the common base current gain will be 0.98
bjt
emitter
current
common
base
gain
thumb_up_alt
0
like
thumb_down_alt
0
dislike
150
views
1
answer
asked
Mar 19, 2018
by
anonymous
What is the difference between BJT and FET?
What is the difference between BJT and FET?
Last answer:
BJT is a current opperated transistor while FET is a field opperated transistor.
difference
between
bjt
fet
thumb_up_alt
0
like
thumb_down_alt
0
dislike
2.6k
views
1
answer
asked
Sep 5, 2018
by
anonymous
Compare between BJT and FET on the basis of (i) Biolar/Unipolar (ii) Tharmal Runaway (iii) Noise (iv) Applications
Compare between BJT and FET on the basis of (i) Biolar/Unipolar (ii) Tharmal Runaway (iii) Noise (iv) Applications
Last answer:
Parameter BJT FET Bipolar/Unipolar It is bipolar device i.e. current in this device is carried by electrons and holes. It is unipolar device i.e. current ... in oscilloscopes, electronic voltmeters and other measuring and testing equipment because of their high input impedance.
bjt
fet
biolar
unipolar
tharmal
runaway
noise
applications
thumb_up_alt
0
like
thumb_down_alt
0
dislike
712
views
1
answer
asked
Sep 20, 2017
by
anonymous
what is the value of Beta in power BJT?
What is the value of Beta in power BJT?
Last answer:
The beta value in power BJT is 5 to 10.
beta
value
power
bjt
thumb_up_alt
1
like
thumb_down_alt
0
dislike
83
views
1
answer
asked
Jul 24, 2019
by
anonymous
State reason BJT is called as bipolar junction transistor.
State reason BJT is called as bipolar junction transistor.
Last answer:
BJT is called bipolar junction transistor because in BJT current conduction takes place due to majority as well as minority charge carriers.
bjt
thumb_up_alt
0
like
thumb_down_alt
0
dislike
4.9k
views
1
answer
asked
Apr 26, 2018
by
anonymous
An FET is a better chopper than a BJT because it has
An FET is a better chopper than a BJT because it has (A) lower offset voltage (B) higher series ON resistance (C) lower input current (D) higher input impedance
Last answer:
An FET is a better chopper than a BJT because it has lower offset voltage
fet
bjt
chopper
thumb_up_alt
0
like
thumb_down_alt
0
dislike
551
views
1
answer
asked
Mar 19, 2018
by
anonymous
What is a BJT amplifier?
What is a BJT amplifier?
bjt
amplifier
thumb_up_alt
0
like
thumb_down_alt
0
dislike
75
views
0
answers
asked
Mar 10, 2018
by
anonymous
What is a BJT?
What is a BJT?
Last answer:
Bipolar Junction Transistor (BJT): BJT is a Bipolar device. (Uses both electrons and holes charge carrier for current conduction) Two Junctions (Emitter junction & collector ... mode (Current amplification) Cutoff mode (Open switch) Saturation mode (Close switch)
bjt
thumb_up_alt
0
like
thumb_down_alt
0
dislike
709
views
2
answers
asked
Sep 23, 2017
by
anonymous
Is BJT current controlled or voltage controlled?
Last answer:
BJT is current controlled device.
bjt
controlled
device
thumb_up_alt
3
like
thumb_down_alt
0
dislike
122
views
4
answers
...