How can BJT be used as an amplifier?
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Mar 19, 2018
by
anonymous

Last Answer : Active region of BJT act as amplifier.
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122 views
2 answers
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Sep 27, 2017
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 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
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193 views
1 answer
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Jun 18, 2018
by
anonymous

What is the difference between BJT and FET?
Last Answer : BJT is a current opperated transistor while FET is a field opperated transistor.
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2.7k views
1 answer
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Mar 19, 2018
by
anonymous

State 2 advantages of JFET over BJT.
Last Answer : Advantages of JFET over BJT: 1) High input impedance 2) Better thermal stability 3) Produce less noise 4) Smaller than BJT 5) Rugged in construction and simpler to fabricate 6) High degree of isolation between Input and Output.
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253 views
1 answer
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Jun 24, 2020
by
anonymous

List specification of BJT.
Last Answer : * The bipolar junction transistor (BJT) has small signal current gain, α (hfb). * Maximum collector current Ic (max). * Maximum collector to emitter voltage, VCE (max). * Collector to emitter ... . * Collector to emitter cut off voltage, VCEO. * Base emitter saturation voltage, VBE (sat).
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May 2, 2020
by
anonymous

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.
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5.1k views
1 answer
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Jul 24, 2019
by
anonymous

List configurations of BJT.
Last Answer : Configurations of BJT : 1) Common Base (CB) configuration 2) Common Emitter (CE) configuration 3) Common Collector (CC) configuration
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Jul 10, 2019
by
anonymous
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State the need of biasing of BJT.
Last Answer : Need of biasing: The basic need of transistor biasing is to keep the base-emitter (B-E) junction properly forward biased and the collector-emitter (C-E) junction properly reverse biased ... transistor biasing is necessary for normal and proper operation of transistor to be used for amplification.
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2 answers
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Sep 5, 2018
by
anonymous

Draw circuit diagram of voltage divider biasing list two advantages of voltage divider biasing of BJT.
Last Answer : Two advantages of voltage divider biasing of BJT. 1. It is very simple method of transistor biasing. 2. The biasing conditions can be very easily set. 3. there is no loading of ... 5. The resistor RE introduces a negative feedback. So all the advantages of negative feedback are obtained.
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784 views
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Sep 5, 2018
by
anonymous

Compare BJT with FET
Last Answer : FET BJT It is unipolar device i.e. current in the device is carried either by electrons or holes It is bipolar device i.e. current in the device is carried either by ... from minority- carrier storage effects & therefore has lower switching speeds & cut-off frequencies.
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70 views
1 answer
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Sep 5, 2018
by
anonymous

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.
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1 answer
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Sep 5, 2018
by
anonymous

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
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1 answer
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Apr 28, 2018
by
anonymous

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
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681 views
1 answer
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Apr 26, 2018
by
anonymous
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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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553 views
1 answer
asked
Mar 19, 2018
by
anonymous

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)
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743 views
2 answers
asked
Mar 10, 2018
by
anonymous

What is the difference between beta and forced beta for BJT?
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554 views
0 answers
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Feb 20, 2018
by
anonymous

Explain open emitter BJT drive circuit.
Last Answer : open emitter BJT drive circuit:
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262 views
1 answer
asked
Feb 19, 2018
by
anonymous

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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Feb 6, 2018
by
anonymous

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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985 views
1 answer
asked
Feb 3, 2018
by
anonymous

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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450 views
1 answer
asked
Nov 10, 2017
by
anonymous

Last Answer : Yes IGBT is costlier than BJT and MOSFET.
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2.6k views
1 answer
asked
Sep 29, 2017
by
anonymous

Last Answer : Yes BJT have internal capacitances.
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91 views
1 answer
asked
Sep 27, 2017
by
anonymous

Last Answer : BJT act as switch in saturation and cutoff region ( ON state in saturation region and OFF state in cut-off region )
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2 answers
asked
Sep 27, 2017
by
anonymous

Last Answer : In cut-off region of BJT both the emitter-base junction and collector-base junction are reverse biased.
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95 views
2 answers
asked
Sep 27, 2017
by
anonymous

Last Answer : Active , Saturation , Cut-off region of operations in BJT.
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2.7k views
2 answers
asked
Sep 27, 2017
by
anonymous

Last Answer : Yes BJT have second breakdown problem.
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100 views
1 answer
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Sep 23, 2017
by
anonymous

Last Answer : BJT is current controlled device.
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145 views
4 answers
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Sep 23, 2017
by
anonymous

Last Answer : BJT have three terminals Base, emitter and collector.
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1 answer
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Sep 21, 2017
by
anonymous

What is the value of Beta in power BJT?
Last Answer : The beta value in power BJT is 5 to 10.
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107 views
1 answer
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Sep 20, 2017
by
anonymous

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.
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295 views
1 answer
asked
Sep 15, 2017
by
anonymous

Last Answer : Because it has a higher switching frequency and heat tolerance.
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1 answer
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Sep 15, 2017
by
anonymous

Last Answer : ON state losses of IGBT is less as compared to MOSFET and BJT.
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1 answer
asked
Sep 13, 2017
by
anonymous

Last Answer : In BJT there is movement of electrons and holes accros the junctions which is basicaly current flow.
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364 views
2 answers
asked
Sep 10, 2017
by
anonymous

Last Answer : When Q-point is at cut off region means it is just above the horizontal axis VCE
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110 views
1 answer
asked
Sep 10, 2017
by
anonymous

Last Answer : The proper flow of zero signal collector current and the maintenance of the proper collector emmiter voltage during passage of single called as transistor biasing
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89 views
1 answer
asked
Sep 10, 2017
by
anonymous

Last Answer : Beta is the current gain which is the ratio of collector current to base current.
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70 views
1 answer
asked
Sep 10, 2017
by
anonymous

Last Answer : BJT control the flow of electron so it is a active device.
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131 views
1 answer
asked
Sep 10, 2017
by
anonymous

Last Answer : No, BJT is a current controlled device .
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184 views
1 answer
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Sep 10, 2017
by
anonymous

Last Answer : Bipolar junction transistor
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94 views
1 answer
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Sep 10, 2017
by
anonymous
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Last Answer : Transformer coupled amplifiers Direct coupled amplifiers Multistage amplifiers Darlington amplifiers Emmiter follower
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90 views
1 answer
asked
Sep 10, 2017
by
anonymous
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what are bjt transistors?
Last Answer : Bjt transistor is a type of transistor which uses both electrons and hole charge carrier.bjts are used as switches and amplifiers.They amplify currents.
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107 views
1 answer
asked
Sep 10, 2017
by
anonymous

A feedback amplifier has a gain of 1000 without feedback. Find the gain with feedback and the amount of feedback in dB for a negative feedback of 10%.
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0 answers

working of class B push pull amplifier.
Last Answer : Circuit Diagram:- Operation: In class B amplifier transistor conduct only for half cycle of input signal.One conduct in positive half cycle and other conducts in negative half ... Then output transformer joins these two halves and produces a full sine wave in the load resistor.
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174 views
1 answer
asked
Sep 3, 2019
by
anonymous

Compare amplifier and oscillator.
Last Answer : Figure shows a block diagram of an amplifier and an oscillator. An amplifier is a device, which produces an output signal with similar waveform as that of the input. ... is supplied. An oscillator does not require any external signal to start or maintain energy conversion process.
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93 views
1 answer
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Sep 3, 2019
by
anonymous

role of tuned LC circuit in tuned amplifier.
Last Answer : In order to pick up and amplify the desired radio frequency signal, the resistive load in the audio amplifier is replaced by a tuned circuit (also called a parallel resonant circuit)as shown ... desired radio frequency signal. (ii)Amplification of the selected signal to a suitable voltage level.
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117 views
1 answer
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Sep 3, 2019
by
anonymous

applications of RC coupled amplifier
Last Answer : Applications of RC coupled amplifier: (i) Widely used as Voltage amplifiers. (ii) They are used in Public Address System. (iii) In Tape recorders. (iv) In stereo amplifiers (v) In T.V. V.C.R. and C.D. Players.
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94 views
1 answer
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Sep 3, 2019
by
anonymous

characteristics of Hi-Fi amplifier system.
Last Answer : Characteristics of HI-FI amplifier: 1. Signal to noise ratio should be better than 50dB. 2. Frequency response should be flat within +-1dB. 3. Nonlinear distortion should not be more ... provided. 6. Environmental conditions should be such as to eliminate the external noise in listening room.
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76 views
1 answer
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Sep 2, 2019
by
anonymous

two stage amplifier and need of multistage amplifier.
Last Answer : Circuit diagram of two stage amplifier : Need of multistage amplifier: The output from a single stage amplifier is usually insufficient to drive an output device. So that ... to second amplifier. To increase the overall gain of the amplifier multistage amplifier is needed.
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95 views
1 answer
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Aug 19, 2019
by
anonymous

advantages and disadvantages of direct coupled amplifier over RC coupled amplifier.
Last Answer : Advantages: Due to absence of coupling capacitors, the gain does not reduce on the lower frequency side. This amplifier can amplify dc signals. Reduced cost and complexity due to absence of ... The output waveform has a dc shift. Poor frequency response at a higher frequency.
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619 views
1 answer
asked
Aug 19, 2019
by
anonymous
