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What is meant by pinch off voltage in MOSFET?
asked
Mar 19, 2018
by
anonymous
What is meant by pinch off voltage in MOSFET?
pinch
off
voltage
mosfet
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asked
Sep 5, 2018
by
anonymous
Define pinch off voltage and drain resistance of FET.
Define pinch off voltage and drain resistance of FET.
Last answer:
1 . Pinch-off Voltage: It is the value of the drain to source voltage VDS at which the drain current ID reaches its constant saturation value. Any further increase in VDS does not have any ... drain to source voltage to the change in drain current. It is also called AC/dynamic drain resistance.
define
pinch
off
voltage
drain
resistance
fet
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1
asked
Mar 19, 2018
by
anonymous
What is meant by body effect in MOSFET?
What is meant by body effect in MOSFET?
body
effect
mosfet
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asked
Jun 18, 2018
by
anonymous
The SCR would be turned OFF by voltage reversal of applied anode-cathode ac supply frequency of
The SCR would be turned OFF by voltage reversal of applied anode-cathode ac supply frequency of A) 10 kHz B) 10 Hz C) 5 kHz D) 5 Hz
scr
turned
off
voltage
reversal
anode-cathode
ac
supply
frequency
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3
asked
Feb 14, 2018
by
anonymous
Explain the principle of ON OFF control and phase control of AC voltage controller with suitable circuit and waveforms.
Explain the principle of ON-OFF control and phase control of AC voltage controller with suitable circuit and waveforms.
Last answer:
The integral cycle control (on-off control) and phase angle control are the two types of AC voltage controller. The principle of ON-OFF control: The on-off control is also called an integral cycle ... control. In phase control, the switch is on for some period of each cycle.
on
off
control
phase
ac
voltage
controller
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asked
Aug 8, 2017
by
anonymous
what is gate turn off thyristor (GTO)?
Draw the structural diagram of GTO. Explain briefly the switching behavior of GTO with the help of appropriate voltage and current waveform.
Last answer:
Gate Turn Off Thyristor (GTO) Conventional Thyristor can be turned on with gate terminal but can not turn off from gate terminal. But in case of Gate Turn Off Thyristor (GTO), we can turn it on and off ... subdivided as storage period (Ts), fall period (Tp) and tail period (Tt).
gto
gate
turn
off
thyristor
voltage
current
waveform
switching
characteristics
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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
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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
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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
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8
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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2
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9
asked
Mar 19, 2018
by
anonymous
What is the transconductance of a MOSFET?
What is the transconductance of a MOSFET?
transconductance
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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12
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.
mosfet
polarity
inversion
layers
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asked
Jun 18, 2018
by
anonymous
When does the Body bias effect occur in an n-channel MOSFET?
When does the Body bias effect occur in an n-channel MOSFET? A) When the Source voltage is less the Bulk voltage B) When the Source voltage is equal to or greater the Bulk voltage C) When the Drain voltage is equal to the Bulk voltage D) When the Gate voltage is equal to the Bulk Voltage
Last answer:
When does the Body bias effect occur in an n-channel MOSFET? A) When the Source voltage is less the Bulk voltage B) When the Source voltage is equal to or greater the Bulk voltage C) ... voltage is equal to the Bulk voltage D) When the Gate voltage is equal to the Bulk Voltage
body
bias
effect
n-channel
mosfet
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asked
Mar 19, 2018
by
anonymous
Why Mosfet is called Mosfet?
Why Mosfet is called Mosfet?
mosfet
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15
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
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asked
Mar 10, 2018
by
anonymous
What is meant by extra high voltage transmission?
What is meant by extra high voltage transmission?
Last answer:
HT & LT two types transmission in industrial line
extra
high
voltage
transmission
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17
asked
Mar 10, 2018
by
anonymous
What is meant by flash over voltage?
What is meant by flash over voltage?
flash
over
voltage
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18
asked
Mar 10, 2018
by
anonymous
What is meant by a voltage surge?
What is meant by a voltage surge?
voltage
surge
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asked
Jun 18, 2018
by
anonymous
A certain power MOSFET has a maximum junction temperature specification of 1500o C, a junction-to-case
A certain power MOSFET has a maximum junction temperature specification of 1500o C, a junction-to-case thermal resistance of 1.00 C/W, and a junction-to ambient thermal resistance of 600 C/W. If the ambient temperature is 300o C, then the maximum allowable power dissipation in the device will be A) 1.52 W B) 1.72 W C) 1.92W D) 2.00 W
Last answer:
A certain power MOSFET has a maximum junction temperature specification of 1500o C, a junction-to-case thermal resistance of 1.00 C/W, and a junction-to ambient thermal resistance of ... 300o C, then the maximum allowable power dissipation in the device will be 2.00 W
power
mosfet
maximum
junction
temperature
specification
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asked
Mar 19, 2018
by
anonymous
A MOSFET has how many terminals?
A MOSFET has how many terminals?
Last answer:
A MOSFET having three terminals 1st one is Gate (insulated), 2nd one is Source and 3rd one is Drain.
mosfet
terminals
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3
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21
asked
Mar 19, 2018
by
anonymous
How can we check a Mosfet?
How can we check a Mosfet?
mosfet
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22
asked
Mar 19, 2018
by
anonymous
MOSFET uses the electric field of?
MOSFET uses the electric field of?
Last answer:
MOSFET uses the electric field of gate capacitance.
mosfet
uses
electric
field
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23
asked
Mar 20, 2018
by
anonymous
The fuse blows off by?
Last answer:
The fuse blows off by melting.
fuse
blows
off
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1
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24
asked
Sep 10, 2017
by
anonymous
thyristor can be turned off by?
Last answer:
Thyristor can be turned off by making anode potential equal to cathode potential or by making anode potential less than cathode potential.
thyristor
turned
off
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asked
Jun 18, 2018
by
anonymous
How is the GTO turned off?
How is the GTO turned off? A) By using a commutation circuit B) By applying reverse gate pulse C) By using a latch-up circuit D) By reverse anode current pulse
Last answer:
How is the GTO turned off? A) By using a commutation circuit B) By applying reverse gate pulse C) By using a latch-up circuit D) By reverse anode current pulse
gto
turned
off
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26
asked
Mar 6, 2018
by
anonymous
SCR turned off when the anode current falls below?
Last answer:
SCR turned off when the anode current falls below holding current.
scr
turned
off
anode
current
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512
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27
asked
Sep 21, 2017
by
anonymous
how can we turn on and turn off GTO?
Last answer:
GTO can be turned on by providing positive pulse to the gate terminal and it can be turn off by providing negative pulse to gate terminal.
gto
turn
on
off
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28
asked
Sep 21, 2017
by
anonymous
can we turn off thyristor using Gate?
Last answer:
No we cannot turn off normal thyristor using Gate.
thyristor
turn
off
using
gate
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29
asked
Sep 23, 2017
by
anonymous
MOSFET are current controlled or voltage controlled devices?
Last answer:
MOSFET are voltage controlled devices.
mosfet
controlled
device
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30
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
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31
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
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32
asked
Aug 6, 2017
by
anonymous
what is MOSFET ?
what is MOSFET ?
Last answer:
MOSFET is a type of Field Effect Transistor (FET). It is a voltage controlled transistor. MOSFET have very high input impedance. It can be use with very low current circuits. It is very fast ... of Nano ampere. There are two types of MOSFET one is enhancement mode and second is depletion mode.
mosfet
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33
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
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asked
Aug 3, 2019
by
anonymous
What parameters are to be considered when choosing a MOSFET?
What parameters are to be considered when choosing a MOSFET?
parameters
mosfet
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44
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0
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35
asked
Sep 22, 2017
by
anonymous
What are the two types of mosfet?
Last answer:
MOSFETs are of two types namely 1) enhancement type MOSFET or E-MOSFET 2) depletion type MOSFET or D-MOSFET
mosfet
types
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2
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36
asked
Aug 13, 2017
by
Zeeshan
what are the uses of MOSFET ?
what are the uses of MOSFET ?
Last answer:
Choppers and inverters and where high switching frequency is required.
mosfet
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37
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
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38
asked
May 14, 2018
by
anonymous
Pinch off voltage of a J FET is the drain to source voltage above which drain current.
Pinch off voltage of a J FET is the drain to source voltage above which drain current. • Increases • Decreases • Remains constant • Becomes zero
Last answer:
Pinch off voltage of a J FET is the drain to source voltage above which drain current Remains constant
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39
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
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40
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
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127
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41
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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1
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42
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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43
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
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1
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44
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
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45
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
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110
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46
asked
Sep 13, 2017
by
anonymous
why igbt is used instead of bjt and mosfet?
Last answer:
ON state losses of IGBT is less as compared to MOSFET and BJT.
igbt
bjt
mosfet
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108
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1
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47
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
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167
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48
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
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97
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1
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49
asked
Jun 15, 2020
by
anonymous
Define with respect to FET:- (i) Static drain resistance (ii) Dynamic resistance (iii) Trans conductance (iv) Pinch-off voltage
Define with respect to FET:- (i) Static drain resistance (ii) Dynamic resistance (iii) Trans conductance (iv) Pinch-off voltage
Last answer:
(i) Static drain resistance- It is the ratio of drain source voltage (ΔVDS) to the drain current (ID) at constant gate-source voltage. It can be expressed as, Rd = (VDS)/(ID) at ... of charge carrier and the value of drain current reaches its constant saturation value is called pinch off voltage.
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