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A differential amplifier stage has collector resistors of 5.1k ohm each if ic1 equals 1.35ma and ic2 equals 1.29ma what is the differential output voltage?
Wiki User
∙ 13y ago
If a differential amplifier stage has collector resistors of 5.1k ohms and if ic1 equals 1.35ma and ic2 equals 1.29ma the differential output voltage is 0.306 volts.
(5.1 * 1.35) - (5.1 * 1.29)
Wiki User
∙ 13y ago
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How do you design a bjt amplifier with gain 10?
To design a bjt amplifier with gain 10, consider that gain in a class A common emitter configuration is collector resistance divided by emitter resistance. So, pick the two resistors so that their ratio is ten. Bias the base so that the collector is at the center of the operating voltage range, along with the transistor being at the center of its linear region. Of course, you need to consider impedance and operating current, so you need to choose carefully. Also, the beta (hFe) of the transistor must be substantially more than ten for this to work reliably. Often, this voltage gain stage is followed by a class C common collector emitter follower to give you current gain as well.
Two resistors are connected in parallel to a battery What must the votlage across these two resistors?
Both resistors will have the voltage of the battery.
Who measure of charge differential voltage?
Any one using a voltage test instrument can measure charge differential voltage.
What is amplifier and what is the general circuit of amplifier?
An amplifier amplifies voltage or current. The most basic amplifier consists of a transistor where a signal is fed into the base and is output to the emitter or collector. For simple, low frequency applications (not RF), it may be simpler to use an operational amplifier (op amp) than designing your own amplifier. Also, the data sheets provide very helpful schematics for creating an amplifier. A very common one is the 741; these are also fairly cheap.
Why common emitter amplifier gives phase reversal?
A: Because it is a voltage amplifier the current will inversely reflect the voltage across a resistor
Application of a common - collector amplifier circuit?
Common collector amplifier can be used as a voltage buffer and in impedance matching
What is the purpose of common collector voltage amplifier where voltage gain is unity?
It is a current amplifier. It can be used to boost current in an output stage to a speaker, for example, or for circuit isolation (two of many purposes). If you took a differential amplifier output stage to an 8 ohm speaker, it is very likely you would load the amplifier to the point of making it worthless (it would not amplify).
What is the inference of instrument amplifier?
The differential voltage is amplified using the instrumentation amplifier.This is the inference we know from instrumentation amplifier...
Which bjt transistor amplifier can be used as a voltage buffer?
the common collector can use as voltage buffer
Why output of common emitter amplifier is inverted?
In a common emitter amplifier, the base-emitter current causes a corresponding collector-emitter current, in the ratio of hFe (beta gain) or collector resistance over emitter resistance, which ever is less. Since this ratio is usually greater than one, the differential collector current is greater than the differential base current. This results in amplification of the base signal. As you increase the base-emitter current, the collector-emitter current also increases. This results in the collector being pulled towards the emitter, with the result that the differential collector voltage decreases. This results in inversion of the base signal.
Main use of a Common collector transistor amplifier is?
No voltage gain
What are application of ic 741 opamp?
A 741 Op-amp has three distinct parts and applications. They are a differential amplifier, a voltage amplifier, and an output amplifier.
How transistor produce 180 degree phase shift?
In the common emitter configuration, a class A amplifier, an increase in base voltage (the input) leads to an increase in base-emitter current which leads to a proportionately larger increase in base collector current. That pulls the collector towards the emitter, which decreases the collector voltage. Since the collector is the output, this configuration is an inverting amplifier.
Why phase shift of ce configuration is 180 out of phase while cc has same phase?
In a ce amplifier, an increase of base voltage causes the collector current to rise. This causes an increased voltage drop through the collector load resistor, so the collector voltage drops. With a cc amplifier the increase in current causes more voltage across the emitter load resistor, therefore the emitter voltage rises.
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 ratios and hFe.If the collector-emitter junction is shorted, then this circuit degrades to a simple voltage divider, or single resistor, and the collector-emitter voltage differential will be approximately zero. Simply calculate the voltage based on the one or two resistances.Results could be different than calculated, if the resistors are small in camparision to the shorted impedance, and it could be different depending on the base to emitter or collector relationship in that fault state, though the latter case is usually negligible due to the relatively high resistances of the base bias circuit.
Why in common collector amplifier however you change value of resistance not amplifier in voltage?
The question does not quite make sense. It sounds like you are asking why does changing the emitter resistor in a class C common collector amplifier not affect the output voltage? If so, the answer is that the common collector is an emitter follower, meaning that the emitter will follow the base, less the base-emitter junction voltage, within the limits of hFe. The resistor is simply there to ensure output biasing when the base voltage goes low.
What are the advantages and disadvantages in using common collector amplifier?
Current gain. At the cost of no voltage gain.
