Why transistor is called as bipolar device.

Why transistor is called as bipolar device.
by

1 Answer

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.
by

Related questions

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

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)

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 .

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° 

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:

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) .

List various transistor biasing methods.

Description : List various transistor biasing methods.

Last 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. 

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.

why thyristor is called semi controlled device?

Last Answer : Thyristor can only be turned on by small gate pulse but it cannot be turn off by using gate hence thyristor is called semi controlled device.

why thyristor is called latching device?

Last Answer : Thyristor can be turn on by positive gate pulse and the current will continue to flow through the device even when the gate voltage is low hence thyristor is called latching device.

fabrication of semiconductor device and describe its need.

Description : State any four materials used in fabrication of semiconductor device and describe its need.

Last Answer : For fabrication of semiconductor devices like transistors diode, solar cell etc. we have to make use of following types of materials  1. Substrate: o It is used for deposition of thin ... . o Metal cans and sealed glass containers satisfy the extreme requirements of space and military users.

Linear and non-linear device

Description : Linear and non-linear device

Last Answer : Linear and non-linear device

Who has experiance with Bipolar disorder and Merena IUD?

Description : Who has experiance with Bipolar disorder and Merena IUD?

Last Answer : I’m very sorry I cannot help you but I wish you every success in finding a solution to your problem, it sounds like you are grappling with some big decisions.

Is it advisable for someone who is bipolar to keep a loaded gun in the house?

Description : Is it advisable for someone who is bipolar to keep a loaded gun in the house?

Last Answer : It's a bad idea for anyone to keep a loaded gun in the house, and worse for someone who is bipolar. Depression and despair are implicit in bipolar; it is not far from there to suicidal impulses and ... pretty rapid way to commit suicide without any way to change one's mind in the midst of the act.

Bipolar disorder: What clues you in to the difference between legitimate fear/paranoia and symptomatic or imagined attacks?

Description : Bipolar disorder: What clues you in to the difference between legitimate fear/paranoia and symptomatic or imagined attacks?

Last Answer : answer:In my personal experience with bipolar disorder, I can't readily tell the difference until afterwards. That's the problem. I can't recognize the unreasonable, delusional fears from the legitimate ones. ( ... and one mood stabilizer. It all works to keep me on an even keel, more or less.

A question for bipolar sufferers?

Description : A question for bipolar sufferers?

Last Answer : answer:I understand these symptoms very well. While it's been a long time since I went days with little or not sleep, I remember it well. Everything was heightened. Though I was weary, I couldn't sleep. I ... awful. I wish you the best of luck. Feel free to send me a private message, if you want.

Does this sound like bipolar disorder or is it my depression?

Description : Does this sound like bipolar disorder or is it my depression?

Last Answer : It's not easy to say, but my gut says, probably depression. Bipolar can have irritability as a symptom, but depression makes people irritable as well. I'd be more suspicious of bipolar if you ... and how it led you to do destructive things because you had trouble connecting with your human limits.

Bipolar disorder or plain evil?

Description : Bipolar disorder or plain evil?

Last Answer : False alternative. What’s wrong with Bipolar AND evil?

Question for those familiar with Bipolar Disorder?

Description : Question for those familiar with Bipolar Disorder?

Last Answer : I haven’t been through the rapid cycling, but I am bipolar. I posted a long answer here to something similar to this. I hate to just point you to the answer to another question on here, but it really is what works for me.

How well do bipolar medications help at regulating moods?

Description : How well do bipolar medications help at regulating moods?

Last Answer : It may take a while to get the right combination that works for you. You have a really tough illness. I am so sorry about your diagnosis. My daughter and has decided to try to avoid medications but she ... so good. She does take an anxiety med about twice a month when it gets really bad. Good luck!

Help me understand bipolar disorder? PLEASE READ DETAILS?

Description : Help me understand bipolar disorder? PLEASE READ DETAILS?

Last Answer : answer:I don't think you can generalize about how long a manic or a deoressive stage will last, it is so individual, depends on how fast they seek treatment, if they find the right drug off ... and then they might start sliding backwards. I'll forward your question to some jellies who are bipolar.

Have any of you taken Trileptal for either seziures or bipolar?

Description : Have any of you taken Trileptal for either seziures or bipolar?

Last Answer : I have had several friends on Tegretol, it’s old formulation. It just makes you really, really sleepy – it’s really great for when you have so many nightmares you never get any restful sleep.

Bipolar is to Borderline Personality Disorder as...

Description : Bipolar is to Borderline Personality Disorder as...

Last Answer : My first wife is to my second wife is to my thir…

Would you please help me think of a name for my blog about being bipolar?

Description : Would you please help me think of a name for my blog about being bipolar?

Last Answer : What about North and South?

Have you ever taken tegretol for bipolar disorder?

Description : Have you ever taken tegretol for bipolar disorder?

Last Answer : answer:Don't know about Tegretol. How many different meds have you tried? Have you tried Lithium yet? I know people who have tried a dozen meds and still not got something that really works. So be ... can. No one takes a drug when the side effects are horrible. So the drug is really useless.

Are there any tell-tell signs that might indicate that I might be bipolar?

Description : Are there any tell-tell signs that might indicate that I might be bipolar?

Last Answer : You sound like you're hitting some of the marks. The best way to go now is to see a psychiatrist and be evaluated. Mental Illness simply cannot be diagnosed online. They'll talk to you; get your ... fill in the bubble type). Here is a search for psychiatrists that you can narrow down by your area.

How do you deal with having a bipolar mixed state?

Description : How do you deal with having a bipolar mixed state?

Last Answer : answer:I start my action plan. Mixed states are the most dangerous so professional help is usually required. Be careful with yourself. I tell my support network how I'm feeling and what I feel up to doing. ... feel whatever I am feeling. No feeling is ever wrong- it's what we do with it that counts.

Is being Bipolar considered a disability?

Description : Is being Bipolar considered a disability?

Last Answer : Yes, it can be. Depends on if it limits a normal life activity. I know two people who suffer from Bipolar Disorder who are on SSD. If you feel you should qualify stay in treatment and talk to an attorney who does Social Security work.

Have you ever heard of bipolar autism? Could this be a new disorder on the rise?

Description : Have you ever heard of bipolar autism? Could this be a new disorder on the rise?

Last Answer : answer:You never know, the world’s full of possibilities. :) If you are concerned about this…you can always go check it out with an expert in the field, but as you said, the chances of diagnosis are pretty slim. Best Wishes.

How do I deal with my bipolar father?

Description : How do I deal with my bipolar father?

Last Answer : answer:Just tell him you love him and you don’t want anything bad to happen to him. You can also say that you and your brother need him in your life, so you hope he continues to take care of himself, including taking his medication. Good luck!

is bipolar disorder genetically transferred to offspring?

Description : is bipolar disorder genetically transferred to offspring?

Last Answer : It can be. Mental illness, as a whole tends to "run in families". But then you have the family member who is totally sane, in the midst of madness. NAMI.com can give you many answers

Can a person be diagnosed with bipolar at an adult age?

Description : Can a person be diagnosed with bipolar at an adult age?

Last Answer : Eh, it’s britney spears so you never know.

Is there any hard evidence that bipolar folk, on average, are smarter than normal people?

Description : Is there any hard evidence that bipolar folk, on average, are smarter than normal people?

Last Answer : For sure more creative and more easily think out of the box, but I am not sure it has anything to do with IQ.

igbt is unipolar or bipolar?

Last Answer : IGBT is a bipolar device.

why igbt is bipolar?

Last Answer : IGBT is a bipolar device because current is carried by both holes and electrons.

Which of the following device is used for coupling microwave energy?

Description : Which of the following device is used for coupling microwave energy?  A) Resonator B) Waveguide C) Loop D) Antenna

Last Answer : A

Which of the following is a negative-resistance microwave device for oscillator applications?

Description :  Which of the following is a negative-resistance microwave device for oscillator applications? A) IMPATT Diode B) Gunn Diode C) Snap diode D) Schottky Diode 

Last Answer :  Which of the following is a negative-resistance microwave device for oscillator applications? A) IMPATT Diode B) Gunn Diode C) Snap diode D) Schottky Diode 

The device which allows reverse power flow and withstands highest switch frequency is

Description : The device which allows reverse power flow and withstands highest switch frequency is (A) GTO (B) MOSFET (C) IGBT (D) Inverter grade SCR

Last Answer : The device which allows reverse power flow and withstands highest switch frequency is MOSFET

A snubber circuit is connected to the power semiconductor device to reduce the

Description : A snubber circuit is connected to the power semiconductor device to reduce the (A) turn-on time (B) turn-off time (C) electrical stresses (D) thermal resistance

Last Answer : A snubber circuit is connected to the power semiconductor device to reduce the electrical stresses

Wagner earthing device is used to eliminate errors due to?

Last Answer : Wagner earthing device is used to eliminate errors due to electrostatic coupling.

Basically a potentiometer is a device for?

Last Answer : Basically a potentiometer is a device for comparing two voltages.

which device prevents the oscillation of the moving system and enables the latter to reach its final position quickly?

Last Answer : A damping device prevents the oscillation of the moving system and enables the latter to reach its final position quickly.

A switchgear is device used for?

Last Answer : A switchgear is device used for switching, controlling and protecting the electrical circuit and equipment.