List various transistor biasing methods.

List various transistor biasing methods.
by
retagged

1 Answer

Answer :

Types of biasing methods: i. Base bias (or fixed bias) ii. Base bias with emitter feedback. iii. Base bias with collector feedback iv. Voltage divider bias (or self bias) v. Emitter bias. 
by

Related questions

Define biasing of transistor

Description : Define biasing of transistor

Last Answer : Biasing of transistor is the process that makes the base emitter junction of transistor always forward biased and collector junction reverse biased for achieving the faithful amplification .

Draw circuit diagram of voltage divider biasing list two advantages of voltage divider biasing of BJT.

Description : 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. 

Describe thermal runaway of transistor and explain how it can be avoided.

Description : Describe thermal runaway of transistor and explain how it can be avoided.

Last Answer : Concept of thermal runaway:  1.We know that  IC = β IB + (1+ β) ICO  Where ICO is the leakage current and ICO is strongly dependent on temperature. 2. Leakage current approximately doubles for ...   Thermal runaway can be avoided by : 1) Using stabilization circuitry 2) Heat sink 

Define α and β of the transistor.

Description : Define α and β of the transistor. 

Last Answer : α: The ratio of collector current IC to emitter current IE for a constant collector to base voltage VCB in the CB configuration is called current gain alpha (α).   β : The ratio of collector ... a constant collector to emitter voltage VCE in the CE configuration is called current gain beta (β) .

State the need of biasing of BJT.

Description : 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. 

What are the types of biasing?

Description : What are the types of biasing?

Last Answer : Biasing is classified into 2 types.The 2 types are 1) Forward biasing 2) Reverse biasing

what is bjt biasing?

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

State the various lighting calculations methods and Describe any one of them.

Description : State the various lighting calculations methods and Describe any one of them.

Last Answer : Lighting calculation methods: 1. Lumens or Light flux method 2. Point to point or Inverse Square law method 3. Watts per Square meter method i) Lumens or Light ... is taken according to the illumination desired on an average value considering overall efficiency of the lighting system.

Compare P.N.P and N.P.N transistor.

Description : Compare P.N.P and N.P.N transistor.

Last Answer : Parameter PNP transistor NPN transistor Definition Two blocks of p- types semiconductors are separated by one thin block of n-type semiconductor. Transistor in which two ntype layer ... Positive Voltage  Emitter Terminal Collector Terminal Ground Signal High Low

Draw construction of SCR using two transistor model. Explain its operation.

Description : Draw construction of SCR using two transistor model. Explain its operation.

Last Answer : Two Transistor Model of SCR or Thyristor

Draw the V-I characteristics of power transistor.

Description : Draw the V-I characteristics of power transistor. 

Last Answer : V-I characteristics of power transistor:

Transistor operating configurations

Description : Transistor operating configurations

Last Answer : Transistor operating configurations

Define junction field effect transistor (JFET) and give an example.

Description : Define junction field effect transistor (JFET) and give an example.

Last Answer : Junction Field-Effect Transistor: It is a semiconductor device having three terminals, namely Gate, Drain and Source, in which the current flow is controlled by an electric field set up by an external voltage applied ... : i) n-channel JFET and ii) p-channel JFET Examples of JFET: BFW 10, BFW 11 

Explain working of n-p-n transistor in unbiased condition.

Description : Explain working of n-p-n transistor in unbiased condition.

Last Answer : Construction of NPN transistor: For an unbiased transistor no external power supplies are connected to it. Base is sandwiched between collector & emitter terminal. It is thin & lightly doped ... providing external power supply to transistor & this process is known as Biasing.

Define α & β and derive the relation between (α) &) (β) of transistor.

Description : Define α & β and derive the relation between (α) &) (β) of transistor.

Last Answer : α : The ratio of output collector current IC to input emitter current IE in the CB configuration is called current gain alpha (α).  β : The ratio of output collector current IC to the input base current IB in the CE configuration is ... ( 1/β) + 1  hence 1/ α = (1+β )/ β  Therefore, α = β /(1+β)

With neat diagram explain working of NPN transistor.

Description : With neat diagram explain working of NPN transistor.

Last Answer : N-p-n transistor is made by sandwiching thin layer of p-type semiconductor between two layers of n-type semiconductor. It has three terminals - Emitter, Base and collector. The npn transistor has two ... up in the collector as it is more positive. In this way, current flows in the transistor.

Draw and explain self-basing of a transistor.

Description : Draw and explain self-basing of a transistor.

Last Answer : Transistor Biasing is the process of setting a transistors DC operating voltage or current conditions to the correct level so that any AC input signal can be amplified correctly by the transistor. ExplanationIt ... Applying KVL to o/p loop , Collector-emitter voltage, VCE = VCC − IC RC

Compare between CB , CE & CC transistor configuration.

Description : Compare between CB , CE & CC transistor configuration.

Last Answer : Parameter CB CE CC I/P impedance Low Or 50Ω Medium Or 600Ωto 4kΩ High Or 1 MΩ Current Gain Less than or equal to 1 High Highest Voltage Gain Medium Medium Less ... k Ω to 50 k Ω Low Or 50 Ω Phase shift between input and output 0° 360° 0° 

Why transistor is called as bipolar device.

Description : Why transistor is called as bipolar device.

Last Answer : BJT is called bipolar device because in BJT current conduction takes place due to majority as well as minority charge carriers that is because of electrons as well as holes.

What is the main use of a transistor?

Description : What is the main use of a transistor?

Last Answer : Main use of a transistor as amplifier and as switch.

List the different level measurement methods.

Description : List the different level measurement methods. 

Last Answer : Liquid Level Measurement Direct method 1. Hook type 2. Sight glass gype 3. Float type 4. Dip stick Indirect method 1. Hydraustatic pressure type 2. Electrical type a) Capacitance level indicator b) Radiation level detector c) Ultrasonic level gauge 3. Radar type

List different starting methods of three phase synchronous motor. Explain any one of them.

Description : List different starting methods of three phase synchronous motor. Explain any one of them.

Last Answer : Different Starting Methods of Three Phase Synchronous Motor: As synchronous motor is not self starting, different methods of starting are as follows: 1) By using an Induction (Pony) motor 2) ... . The rotor gets pulled into synchronism and starts running at constant speed as a synchronous motor. 

List any two methods of reactive power measurement in 3 phase circuit.

Description : List any two methods of reactive power measurement in 3 phase circuit.

Last Answer : Methods of reactive power measurement in 3 phase circuit: (i) Two single phase wattmeter method (ii) One single phase wattmeter method

List the different methods to produce damping torque.

Description : List the different methods to produce damping torque.

Last Answer : Methods of providing damping torque in indicating type instruments: 1) Air friction damping. 2) Fluid friction damping. 3) Eddy current damping.

What are your methods for dealing with unwarranted not to say unwanted attention from a drunk?

Description : What are your methods for dealing with unwarranted not to say unwanted attention from a drunk?

Last Answer : answer:I interact briefly, and loudly, eg YES, IT IS A NICE DRESS ISN'T IT? as I firmly walk away Or, if I am not in a situation where I can't walk away, I just give a half- ... ha ha! I am someone that makes eyecontact with people, and generally quite smiley so I guess I must seem approachable!

State the different methods of Power Generation adopted in India.

Description : State the different methods of Power Generation adopted in India. 

Last Answer : 1. Hydro energy or hydro Electric power plant  2. Nuclear energy or nuclear Power Plant  3. Fossil fuels: i) Thermal energy (by combustion of coal) or Thermal Power Plant ii) Natural gas ... from any organic waste materials. It contains mixture of methane(50-65 % in volume) and carbon dioxide

Describe the following energy conservation methods of lighting system. i) By replacing lamp sources ii) Using light control gears.

Description : Describe the following energy conservation methods of lighting system. i) By replacing lamp sources ii) Using light control gears.

Last Answer : Energy conservation methods of lighting system:  i) By replacing lamp sources:  Installation of energy efficient fluorescent lamps in place of Conventional fluorescent lamps. Installation of ... (HF) electronic ballasts in place of conventional ballasts which saves energy up to 35%.

Describe the following energy conservation methods of electrical motor. i) By motor survey ii) By matching loads with motor rating

Description : Describe the following energy conservation methods of electrical motor. i) By motor survey ii) By matching loads with motor rating

Last Answer : Energy conservation methods of electrical motor:  1) By Motor Survey: Large industries have a massive population of LT motors. Load survey of LT motors can be taken-up methodically to ... -speed motors, eddy-current couplings, fluid couplings, and solid-state electronic variable speed drives.

How are nuclear reactors controlled? Explain two different methods in brief.

Description : How are nuclear reactors controlled? Explain two different methods in brief.

Last Answer : Nuclear reactor is controlled using control rods: Control rods are made up of very high neutron absorbing material like boron, cadmium. By adjusting height of control rods on reactor core ... of nuclear reaction will increase. Whereas by pushing control rod towards the core it will reduce.

Name two methods for measurement of low, medium and high resistance. Give one advantage and one limitation of V- I method.

Description : Name two methods for measurement of low, medium and high resistance. Give one advantage and one limitation of V- I method.

Last Answer : Methods for measurement of low resistance:  1. Ammeter voltmeter method  2. Kelvin's bridge method  3. Ohm meter method  4. Potentiometer method  5. Digital/analog multi-meter ... must be infinity for perfectly accurate measurement which is not possible.  2. Connection errors.

Identify the correct combination of respective Electric arc welding and Electric resistance welding methods :

Description : Identify the correct combination of respective Electric arc welding and Electric resistance welding methods :  (A) Butt welding and Seam welding  (B) Hydrogen shielding and Projection welding  (C) Seam welding and Coated electrode welding  (D) Coated electrode welding and Hydrogen shielding

Last Answer : Identify the correct combination of respective Electric arc welding and Electric resistance welding methods :  (A) Butt welding and Seam welding  (B) Hydrogen shielding and Projection welding  ... Seam welding and Coated electrode welding  (D) Coated electrode welding and Hydrogen shielding

What are the speed control methods of dc motor?

Description : What are the speed control methods of dc motor?

Last Answer : Field control of DC motor Armature control of DC motor

What is your method for making pancakes?

Description : What is your method for making pancakes?

Last Answer : I buy premade ones from the supermarket and then put them in the microwave for a minute, and then drown them in sugar.

What is the easiest way to crack black walnut shells?

Description : What is the easiest way to crack black walnut shells?

Last Answer : answer:Nut cracker and a nut picking tool. A nut cracker can be found at Dollar General Store. Just make sure the walnuts are not green inside.

Do you back down from arguments or are you a "raging bull"?

Description : Do you back down from arguments or are you a "raging bull"?

Last Answer : I’ve learned to compromise :-/

Road safety measures: Is this a good or a bad idea? (see details)

Description : Road safety measures: Is this a good or a bad idea? (see details)

Last Answer : I agree with you. I can see it causing drivers to slam on their breaks and I could also see it desensitizing drivers to children actually being in the streets. I would imagine after driving over it ... it would effect their reaction time (causing them to hit the child instead of being able to stop).

Your way to defeat lazyness?

Description : Your way to defeat lazyness?

Last Answer : So far, nothing has ever worked for me!

What are the methods of transistor biasing?

Description : What are the methods of transistor biasing?

Last Answer : 1. fixed bias 2.collector to base bias 3. self bias or voltage divider bias 4. emitter bias

Which of the following statements is wrong for transistor biasing methods:

Description : Which of the following statements is wrong for transistor biasing methods:  1. The base resistor method does not provide stabilization of operating point 2. The biasing with feedback ... than collector feedback method 4.Voltage divider bias is widely used because it has stable operating point

Last Answer : Which of the following statements is wrong for transistor biasing methods:  1. The base resistor method does not provide stabilization of operating point 2. The biasing with feedback ... than collector feedback method 4.Voltage divider bias is widely used because it has stable operating point 

Explain with circuit diagram, voltage divider biasing method and state its two advantages.

Description : Explain with circuit diagram, voltage divider biasing method and state its two advantages.

Last Answer : a)Here R1 and R2 forms voltage divider biasing arrangement. b)voltage drop across R2 ,forward biases the base emitter junction. c)so base current flows and hence collector ... Operating point stabilized against shift in temperature. · Operating point is almost independent of β variation

RC time constant characteristics, as shown in the illustration, are important in _____________. EL-0086 A. bridge rectifiers for alternator excitation B. timing and pulse shaping circuits C. transistor power amplifier biasing D. motor controller overload protection

Description : RC time constant characteristics, as shown in the illustration, are important in _____________. EL-0086 A. bridge rectifiers for alternator excitation B. timing and pulse shaping circuits C. transistor power amplifier biasing D. motor controller overload protection

Last Answer : Answer: B

Write about the biasing of a transistor.

Description : Write about the biasing of a transistor.

Last Answer : Emitter base junction is forward biased while collector base junction is reverse biased.

A bipolar junction transistor (BJT) is used as a power control switch by biasing it in the cut-off region

Description : A bipolar junction transistor (BJT) is used as a power control switch by biasing it in the cut-off region (OFF state) or in the saturation region (ON state). In the ON state, for ... base-collector junction is reverse biased (D) both the base-emitter and base-collector junctions are forward biased

Last Answer : A BJT is as a power control switch by biasing it in cut-off region (OFF state) or in the saturation region (ON state). In  ON state, for BJT both the base-emitter and base- collector junctions are forward biased

Define Transistor. State its type.

Description : Define Transistor. State its type.

Last Answer : Transistors are active electronic components made of semiconducting materials, which can amplify the electric signals by the application of a small input signal. Types of transistors: 1. Unipolar Junction Transistors 2. Bipolar Junction Transistors

Derive the relationship between α and β of a transistor.

Description : Derive the relationship between α and β of a transistor.

Last Answer : Relationship between α and β of a transistor :

State reason BJT is called as bipolar junction transistor.

Description : 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.

Besides eliminating the emitter-base battery, what other advantages can different biasing methods offer?

Description : Besides eliminating the emitter-base battery, what other advantages can different biasing methods offer?

Last Answer : Compensation for slight variations in transistor characteristics and changes in transistor conduction because of temperature variations.

List specification of BJT.

Description : 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).

List out the various methods available for performing for analog multiplier.

Description : List out the various methods available for performing for analog multiplier.

Last Answer : • Logarithmic summing technique • Pulse height /width modulation technique • Variable transconductance technique • Multiplication using gilbert cell • Multiplication technique using transconductance technique

List various character generation methods.

Description : List various character generation methods.

Last Answer : Stroke Method Bitmap Method Starburst Method