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Justify the statement. Antiparallel diode is connected across MOSFET.
asked
Feb 2, 2018
by
anonymous
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Apr 21, 2018
by
anonymous
Justify the statement. Antiparallel diode is connected across MOSFET.
antiparallel
diode
mosfet
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answered
Feb 3, 2018
by
anonymous
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.
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Feb 6, 2018
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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.
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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.
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Dec 7, 2017
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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.
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Apr 28, 2018
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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
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Sep 15, 2017
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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.
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Dec 9, 2017
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What is the use of Schottky diode?
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Schottky diode are use in SMPS, Sample and hold circuits and voltage clamping etc.
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What is the use of Tunnel diode ?
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Tunnel diode is use in frequency converters and detectors, ultra high speed switching, amplifiers, etc.
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Apr 28, 2018
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Which phenomenon is present in thyristors but absent in BJT, MOSFET and IGBT ?
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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
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Sep 15, 2017
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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.
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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.
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Sep 15, 2017
by
anonymous
what is enhancement MOSFET?
What is enhancement MOSFET?...............
Last answer:
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Sep 13, 2017
by
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why igbt is used instead of bjt and mosfet?
Last answer:
ON state losses of IGBT is less as compared to MOSFET and BJT.
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Sep 10, 2017
by
anonymous
is mosfet current controlled device?
Last answer:
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Sep 10, 2017
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why mosfet is voltage controlled device?
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Sep 10, 2017
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MOSFET provides better efficiency at high frequency and its high speed switching losses are less hence MOSFET is used for high frequency.
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Jul 25, 2019
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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.
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why is zener diode heavily doped?
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PN junction of zener diode is heavily doped than ordinary diode. For the occurrence of Zener effect the zener diode is heavily doped. If the zener diode is not heavily doped then Zener effect ... breakdown voltage is sharp. If the diode is lightly doped the diode will have higher breakdown voltage.
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Oct 13, 2019
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Write the function of freewheeling diode.
Write the function of freewheeling diode.
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Function of Freewheeling Diode (FWD): a) Freewheeling diode is used across inductive loads such as coils, dc motor armature etc. to prevent voltage spikes across these loads when the switching ... current is shifted from switching device, it is turned off easily and regain its blocking ability.
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Mar 10, 2018
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Explain switching model of MOSFET.
Explain switching model of MOSFET.
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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.
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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.
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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
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Nov 10, 2017
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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.
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Dec 9, 2017
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What would cause a diode to fail?
What would cause a diode to fail?
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Supply voltage beyond its limit
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Dec 9, 2017
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Can we use a zener diode as a rectifier?
Can we use a zener diode as a rectifier?
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Yes we can use zener diode as rectifier but it have limitations better to use normal diode. Zener diode have some different applications.
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Dec 9, 2017
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What does a Shockley diode do?
What does a Shockley diode do?
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It is diode have low forward voltage drop and very high switching action
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asked
Sep 13, 2017
by
anonymous
what does schottky diode do?
Last answer:
It is semiconductor diode with a low forward voltage drop and very high switching action
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asked
Sep 13, 2017
by
anonymous
does dynamic impedance zener diode vary?
Last answer:
Yes dynamic impedance of zener diode vary.
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asked
Sep 13, 2017
by
anonymous
does zener diode regulate voltage?
Last answer:
Yes, Zener diode is a voltage regulator. Zener diode maintain constant reverse Biased Voltage. If the current is varying then also zener diode maintain constant voltage.
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asked
Sep 13, 2017
by
anonymous
can zener diode be used in forward bias?
Last answer:
Yes it can be, and it will act like a normal PN junction diode. The characteristic of ZENER diode is exactly same as PN junction diode in forward Bias.
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diode
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asked
Mar 19, 2018
by
anonymous
What is the transconductance of a MOSFET?
What is the transconductance of a MOSFET?
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asked
Mar 19, 2018
by
anonymous
What is the use of a Mosfet?
What is the use of a Mosfet?
use
mosfet
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asked
Mar 19, 2018
by
anonymous
What is the work of MOSFET?
What is the work of MOSFET?
work
mosfet
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asked
Mar 19, 2018
by
anonymous
In MOSFET, the polarity of the inversion layers is the same as that of?
In MOSFET, the polarity of the inversion layers is the same as that of?
Last answer:
In MOSFET, the polarity of the inversion layers is the same as that of majority carriers in the source.
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polarity
inversion
layers
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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.
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impedance
mosfet
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fet
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asked
Jun 18, 2018
by
anonymous
A diode in which the change in reverse bias voltage varies the capacitance is called as
A diode in which the change in reverse bias voltage varies the capacitance is called as A) Varactor diode B) Switching diode C) Tunnel diode D) Zener-diode
Last answer:
A diode in which the change in reverse bias voltage varies the capacitance is called as Varactor diode
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bias
voltage
capacitance
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asked
Mar 22, 2018
by
anonymous
What is the use of diode in the circuit?
What is the use of diode in the circuit?
Last answer:
Diode is a device which allows the flow of current in one direction and blocks the current in opposite direction.
use
diode
circuit
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99
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1
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asked
Mar 15, 2018
by
anonymous
Which side of the diode is positive?
Which side of the diode is positive?
diode
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asked
Dec 28, 2017
by
anonymous
what is the minimum voltage required to turn on a diode ?
what is the minimum voltage required to turn on a diode ?
Last answer:
0.7 v sil and 0.3 v for gr
minimum
voltage
turn
on
diode
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Sep 27, 2017
by
anonymous
what is the leakage current of diode?
Last answer:
In Reverse bias of diode when the cathode is connected to positive and anode is connected to negative very small current flows this very small current is known as leakage current of diode.
leakage
current
diode
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asked
Mar 19, 2018
by
anonymous
What is meant by pinch off voltage in MOSFET?
What is meant by pinch off voltage in MOSFET?
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off
voltage
mosfet
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asked
Mar 19, 2018
by
anonymous
What is channel length modulation in MOSFET?
What is channel length modulation in MOSFET?
Last answer:
Shortening of lenght of the inverted channel region with increase in drain bias for large drain biases due to which current increases with drain bias and output resistance decreases is called channel length modulation in MOSFET.
channel
length
modulation
mosfet
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asked
Mar 19, 2018
by
anonymous
What is meant by body effect in MOSFET?
What is meant by body effect in MOSFET?
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effect
mosfet
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50
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asked
Mar 19, 2018
by
anonymous
Why Mosfet is called Mosfet?
Why Mosfet is called Mosfet?
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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
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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
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