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to get the base- emitter junction forward bias we should connect the negative of the diode with the negative of the battery and the positive of the diode with the positive of the diode so we should connect negative source in the emitter
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Why we use emitter resistance in circuits?
The emitter resistor is connected to ground(in the case of an rc coupled amplifier).Also input signal applied at the base is grounded.Then the emitter resistor forms a feedback to the input signal (through the ground return path).So emitter resistor is also called feedback resistor.
What is difference between transistor and bias?
"Biasing" applies to transistor amplifier circuits. Simple amplifier circuits can only amplify positive signals. Negative signals cause the amplifier to shut down. However, AC signals in general have both a positive and a negative part. To allow a transistor to amplify AC, we add a positive voltage to the AC signal. Then after it is amplified, we remove the positive voltage again. The voltage, ac or dc on the base, compared to the emitter to cause operation of the transistor to conduct to the collector or to the emiiter in a NPN transistor.
What are the three wires called on a transistor?
Most transistors have three leads. This is true even in power transistors which use the external case or housing to connect to the collector, because the circuit which uses the power transistor must still use three wires to connect to it.
How do NPN transistors work?
on or off
Why you are giving dc supply for biasing the amplifier why not ac?
The purpose of biasing an amplifier is to shift its operating point, so that when you apply a signal in you will get a expected signal out. The operating point is generally in the middle of the linear region. You would not use AC for the bias, as that would cause the operating point to constantly shift, and you would then not be able to differentiate between the signal and the bias.
What is a function of baising?
what is a function of Biasing and explain it's working ? why the Common Emitter Configuration is use as Amplifier ? Explain in Detail ?
Why biasing is needed at all?
Biasing is used in a transistor amplifier circuit in order to place the transistor as nearly as possible in the center of its linear region. Transistors have cutoff, linear, and saturation regions. Too little bias current, and you enter cutoff - Too much, and you saturate. Both conditions cause distortion when you attempt to use the transistor as an amplifier, as opposed to a switch.
What is the forward biasing of a junction?
Forward biasing can be satisfied when a positive polarity of a battery connect with P side and the negative connect with N side In the P-N junction, that is caused : The free electrons in the N side will pushed by negative charge, and holes move far of positive charge, after that we will have a barrier (small area of barrier between P and N) this biasing called Forward biasing, because of small resistance of barrier, the current will flow, we can use it as a switch. the Reverse biasing is the opesit of all these specifications.
Why use a npn transistor in a common emitter bjt single stage amplifier circuit?
You can use an npn or a pnp bjt in a common emitter amplifier circuit. The decision of which one to use is based on whether you want the collector and base to be more positive (npn) or more negative (pnp) than the emitter.
Why do you use biasing circuit?
To fix the operating point
What is the deffbetween forward and reverse biased?
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 one of the valid states, corresponding to a cutoff condition for emitter-collector. However, operation in linear mode, the other normal way to use a BJT, requires that both the emitter-base and the emitter-collector be forward biased. Of course, depending on the ratio of emitter-base to emitter-collector versus hFe, you could also be saturated, which is a non-linear mode, i.e. an on switch.
What is baised?
Transistor is an active device. Active devices (unlike the passive devices such as resistors and capacitors) you have to bias them so that they can function properly. A resistor behaves well no matter what voltage or current you apply to them (it still obeys I=V/R). But a transistor has to be biased at the right voltages in order to operate as what it is supposed to be. For example, in bipolar npn, to have it as signal amplifier (e.g. common emitter), VBE (voltage across Base and Emitter) has to be larger than certain voltage (e.g. 0.7V) and VCE (voltage across collector and emitter) has to be larger than another voltage (e.g. 0.2V). Otherwise, the transistor won't be able to amplify the signals with high gain. In a MOSFET (e.g. NMOS), similarly, we have to bias VGS (gate to source) to be larger than the threshold voltage and VDS (drain to source) to be larger than the saturation voltage. In conclusion, biasing is to use voltage to set the active element at the "right operating region"! The above are just examples. And depends on what you want the transistors to do, you need different "biasing condition". E.g. if you want to make the MOSFET behave like a resistor, you make VDS smaller than the saturation voltage. So, after biasing, how can they be used? Usually, a small voltage (signal) will be coupled to the biased transistors for signal processing.
How do you make a laser in Littlebigplanet?
use an emitter
Why we use blocking and by pass capacitor in CE amplifier?
As the DC component in the signals are not required to be amplified, rather not required at times. Thus a blocking capacitor blocks this DC component from.entering the amplifier. Bypass capacitors are used at the emitter end so that the AC signal reaching the emitter end does not alter the biasing required to maintain the Q-point. All the above happens using the basic characteristic of a capacitor, that it blocks DC and passes AC.
Are lightsabers a chemical light source?
Yes. Plasma is created through the use of a Diatium power cell, and then is sent through focusing crystals, causing a blade to emerge from the emitter.
What is meant by the term source?
usually power source where power comes from logic gates outputs are commonly called source or sink say the power source to the package is positive (VCC is +5) to call the output a source we would use an NPN transistor with the collector connected to +5V the base goes to the logic the emitter is the output terminal the output is the source of +5v sink output would have the emitter grounded base to logic the collector is the output so the output will sink positive voltage to ground A BUFFER usually has two output transistors one for source one for sink and can do either or both
How do you use matrix in a sentence?
The laser beam is produced from the emitter matrix.
