What are the bias condition of the base emitter and base collector junction for a transistor to operate as a switch?
In order for a transistor to operate as a switch, the base-emitter current must be greater than the collector-emitter current divided by a factor of hFe. In this state, the transistor operates in saturated mode, fully turning on.
We can determine which are the emitter and collector of an NPN transistor because the base-emitter junction is forward biased while the base collector junction is reverse biased. Read More
a transistor in active region when emitter junction is forward biased nd collector junction is reverse biased Read More
For a transistor to be in active region : Base Emitter junction should be forward biased and Emitter collector junction should be reverse biased. Read More
What is the most probable junction in transistor maintenance circuits and is it base or base and collector or emitter and collector?
Most probable junction in transister is base emiter Read More
The question is poorly phrased and needs a grammatical cleanup. If you mean to ask "what happens to the collector-emitter current of a transistor when the emitter-base junction is reverse biased" then the answer is that the transistor will turn off, and you will only see leakage current. Read More
To know if a transistor is PNP or an NPN,the following should be verified: For a PNP transistor, the base-collector junction is forward biased while the base-emitter junction is reversed biased. For an NPN transistor, the base-emitter junction is forward biased while the base -collector junction is reversed biased. Read More
The transistor has three regions, emitter,base and collector. The base is much thinner than the emitter while the collector is wider than both. However for the sake of convenience the emitter and collector are usually shown to be of equal size. The transistor has two pn junctions that means it is like two diodes. The junction between emitter and base may be called emitter-base diode or simply the emitter diode.The junction between base and collector… Read More
A transistor is, from a modeling standpoint, a controllable diode. The forward conduction curve of the collector-emitter junction is a function of the base-emitter current. (This assumes we are talking about the common bipolar junction transistor, or BJT.) Theoretically, then, you could use a transistor as a controllable rectifier. If you drive the base into saturation, then you could "think" of the collector-emitter as a diode. However, the collector-emitter junction voltage drop is not the… Read More
What is the biasing requirement for the of the junctions of a transistor for its normal operation Explain how these requirements are met in a common emitter amplifier?
In a transistor for normal operation , emitter base junction is forward biased and collector base junction is reverse biased. Read More
For a bipolar junction transistor: * Emitter * Collector * Base For a field-effect transistor: * Drain * Source * Gate Read More
Two junctions namely emitter-base junction and collector-base junction separates regions in a transistor. Read More
Transistor operates as a switch by providing minute forward bias voltage or no voltage between base emitter junction. If forward bias is zero volts; transistor collector current becomes zero or collector impedance becomes infinite. By applying minute forward bias voltage at base emitter junction, collector current flows in terms of amps. This is how transistor works as a switch. Read More
a transistor can only work in active region cox in active region collector base junction is in reverse bias and emitter base junction is in forward bias. Read More
Base-Emitter Current Collector-Emitter Current Base-Collector Current Read More
The transistor acts like a normal pn diode. in NPN transistor the both n i.e.,collector and emitter ane shorted then they become a n and other is p so pn diode is formed. When the emitter and the collector of a transistor are short, the emitter current =the collector current. Read More
A PNP transistor is connected in a circuit so that the collector-base junction remains reverse biased and the emitter-base junction is forward biased This transistor can be used as a power amplifier?
Yes1 Read More
The emitter, the base, and the collector are parts of a transistor. Read More
The emitter-base junction must be forward biased, and the collector-base junction must be reverse biased. Read More
The emitter of a bipolar transistor (junction or point contact type) emits charge carriers (electrons in an NPN, holes in a PNP) through the base towards the collector. Read More
it is a bipolar junction transistor having p-type emitter & collector terminal and , n-type base terminal . Read More
Asking about biasing of the emitter alone does not make sense. When you talk about bias, you talk about a junction, such as emitter-base or emitter-collector or base-collector. In a bipolar junction transistor (BJT) both the emitter-base and emitter-collector need to be forward biased, otherwise you are operating the BJT in cutoff mode. Certainly, if you intend to operate the BJT as a switch, then reverse bias for emitter-base (actually, zero bias) could well be… Read More
Assuming you mean a bipolar junction transistor (BJT): 1. Reverse bias on the collector-base junction. 2. Forward bias on the base-emitter junction, that is 3. Sufficient to give the correct operating point of collector voltage/collector current. Read More
emitter, emits minority carriers into the thin base material base, controls minority carrier current flow between the emitter and collector collector, collects minority carriers that have passed through the thin base material While the emitter and collector are named for their electronic functions, the base is instead named for its structural function in the first point contact transistor: it was the bottom part of the transistor that structurally supported the other parts (thus the base)… Read More
Did someone ask the question can you use a transistor as a diode there is a device called a transistor diode connect base to either c or e forgot which to make a zero bias diode?
You can use a transistor as a diode if you connect the base to the collector. Any forward current through the base-emitter junction would cause a corresponding increase in the available current through the collector-emitter junction. Since the base-emitter and collector-emitter junctions are in parallel, this would effectively be a diode, but a true diode would be a better solution if diode functionality is what seek. A: There are actually two diodes, per se, inside… Read More
Emitter-Base junction should be forward biased. Collector-Base junction should be reverse biased. Read More
That's referred to as, `hfe` in transistor parlance. Essentially, since a transistor is a current operated device, the gain means that for every milliamp in at the base, the gain (times X) will be amplified through the junction of the collector/emitter. For instance, take a transistor with a gain of 30. One milliamp in at the base will allow the transistor to pass 30 milliamps through the collector/emitter junction. Of course, there will also be… Read More
The collector base depletion zone is wider than the emitter base depletion zone. Read More
No. A diode is not like a transistor, and a transistor is not like (two) diode(s). Taken in isolation, the emitter-base and collector-base junctions of a transistor appear to be diodes, but they are coupled together so that the base-emitter current affects the collector-emitter current. Read More
For the identification of the transistor leads when you were only given with a resistance measuring device follow this procedure. as we know that irrespective of the first and the third leads the middle one always represents base. now measure resistance between 1-2 and 2-3 (say a and b) we know that for any transistor the emitter -base junction is forward biased and the base-collector junction is reverse biased. So, we can conclude that emitter-base… Read More
The bipolar junction transistor is a current operated device with three terminals, emitter, base, and collector. There are two varieties, NPN and PNP. In the NPN variety, if the base is more positive than the emitter and that junction is conducting (greater than typically 0.7 volts), then the current through that junction will control a larger current through the collector emitter junction, when the collecter is also more positive than the emitter and that junction… Read More
Yes, but the results will be quite unsatisfactory due to differences in the dopant profiles of the collector and emitter. In the normal connection, beta will usually be in the range of 20 to 150 and the transistor will operate at the frequency given in the databook. The same transistor with the collector and emitter interchanged, beta will usually be in the range of 3 to 10 and the transistor will be much slower than… Read More
A transistor has three sections, an emitter, base, and collector. By extracting a small number of electrons from the base, a large # of electrons can flow across the transistor from the emitter, thru the circuit, and back to the collector. Read More
A; The base must be positive with respect to the emitter this condition will allow collector current to flow from collector to emitter. If the transistor manage to get saturated the current can flow in both direction. as a switch Read More
UJT (UniJunction Transistor): It is a transistor with only one junction and three terminals: an emitter (E) and two bases (B1 and B2). BJT (Bipolar Junction Transistor): This type of transistor consists of two junctions and three terminals, namely Emitter "E", Base "B" and Collector"C". There are two types of BJT, i) PNP and ii) NPN. Read More
The collector region of a transistor is made larger than the base and the emitter region because the collector region of the transistor disipates heat.. Read More
The breakdown region of a transistor is the region where the supply voltage, Vcc, becomes so large that the collector-emitter junction of the transistor breaks down and conducts, even though there is no base current. Read More
No. A unijunction transistor (UJT) is entirely different in design and application than a bipolar junction transistor (BJT). The UJT works on the principle of voltage modulation of the effective substrate resistance, while the BJT works on the principle of current amplification from one junction to the other, usually base-emitter to collector-emitter. Read More
Explain why the collector voltage is approximately zero when a transistor has a collector-emitter short?
The collector voltage is not necessarily approximately zero when a transistor has a collector-emitter short. It depends on whether or not there is an emitter resistor. A typical collector-emitter circuit has two resistors, one in the collector and one in the emitter. One or both of them might be zero, i.e. not present, depending on design requirements. The collector-emitter junction represents a third resistor, the value of which is dependent on base-emitter vs collector-emitter current… Read More
Common base transistor if the emitter is open current Ie=0 but a small collector current thus exist.this current is reversed biased collector to the base voltage it is represented by Icbo while common emitter is d base terminal is open circuit and the base junction is reversed biased current Icbo flow from the tcollector to the emitter in the external circuit this current is called leakage current. Read More
A transistor operates as a switch by operating it outside of its linear range. Basically, if you apply less voltage across the base-emitter junction than required to turn in on, then it is off, and if you apply more current through the base-emitter junction than collector-emitter current divided by hFe, then then it is on and saturated, fully outside of its linear range. Read More
No, it is not possible because in transistor the depletion layers formed in Emitter-Base Junction & Collector-Base Junction are penetrable by both current carriers but in this case of two diodes; the formed depletion region are not penetrable for current carriers (hole &electron). Also, a transistor works only because the base layer is very thin. You won't get that thin layer between emitter and collector just by connecting two diodes together. This thin base layer… Read More
A Darlington pair uses two transistors connected to behave as a single transistor with a very high current gain (beta). Transistor-1 has its collector connected to the collector of transistor-2. Transistor-1 has its emitter connected to the base of transistor-2. The base of transistor-1 with the emitter and collector of transistor-2 is used as a single transistor. Read More
The transistor is a three layer (or two junction) device, emitter, base, and collector (or other designations for variations such as FET's). Each layer is connected to a terminal. Three layers - three terminals. Read More
Because in this device the resistance between two terminal respectively collector and emitter is changed by changing the base voltage that is it transfers the resistance between emitter and collector therefore it is called as TRANSISTOR. (TRANSFER OF RESISTOR) Read More
The characteristic of NPN transistors is : The base-emitter junction is reversed biased. The base-collector junction is forward biased. Read More
The SL100 transistor has a TO-39 case. In the TO-39, the emitter is closest to the tab, and the collector is furthest away from the tab. Read More
The NPN transistor has its conduction curve where the base is more positive than the emitter, while the collector is also more positive than the emitter. The PNP transistor is exactly opposite, with its conduction curve where the base is less positive than the emitter, while the collector is also less positive than the emitter. Read More
Emitter, Base, Collector. Read More
this transistor is common emitter configurated transistor nd if emmiter nd collector both terminals are reversed bias then no current will be flowing through th terminal... Read More