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A: Any transistor of either polarity can be used as an emitter follower, The purpose of an emitter follower is to provide current to the load since it cannot provide any voltage gain
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Why emitter follower is used in circuits?
The (Class C, Common Collector) Emitter Follower is used to amplify the available current from a voltage driving circuit that might be disturbed by the load impedance. If the actual voltage value is important, the emitter follower is often teamed up with an opamp which sets the emitter voltage based on the input voltage.
Can a transister base-emitter junction be used as a zener diode?
No, the doping profile is entirely wrong. Also some transistors have very low reverse breakdown voltage on the BE junction and will burn out!
Which quantity does a transister amplify?
Depends on the circuit the transistor is used in:it can amplify voltageit can amplify currentit can amplify power
What is a voltage follower Op-amp?
It is an amplifier that has no gain or a gain of one mainly used for isolation .
What will happen if instead of npn transister pnp is used?
It really depends on the configuration of the circuit. A transistor can be connected in any of at least 3 configurations: common base, common emitter, and common collector. Each of these type of configurations determines where the source of electron flow is connected. After that, the biasing configuration needs to be determined, and this will change depending on whether you are using an NPN or PNP transistor. In the simpler biasing configurations, swapping a NPN for a PNP or vice versa will prevent current from flowing as the collector, base, and/or emitter will be reverse or forward-biased incorrectly. You would then either be blocking currently flow, or possibly causing a short circuit. Again, it depends on the configuration. Generally speaking, it is not a good idea. One potential result is you can damage the transistor or even destroy it or possibly damage other components in the circuit.
Why emitter follower is used in circuits?
The (Class C, Common Collector) Emitter Follower is used to amplify the available current from a voltage driving circuit that might be disturbed by the load impedance. If the actual voltage value is important, the emitter follower is often teamed up with an opamp which sets the emitter voltage based on the input voltage.
What is the difference between a CB amplifier and CE and emitter-follower?
I think you mean a common emitter amplifier, which is an amplifier of voltage. Emitter-follower or common collector amplifiers are used to match impedances, or to amplify power or current. The emitter-follower is a type of common emitter circuit that has a resistor between the emitter and ground. The output signal is taken from the point between the emitter and its resistor.
What kind of feedback is used in emitter follower?
emitter follower is a type of negative feedback ,
Why emitter follower is called so?
Because of the geometry of the common collector configuration, changes in base voltage appear at the emitter. Said another way, what happens at the base pretty much happens at the emitter, and the emitter can be said to "mirror" or "follow" the base. The emitter is a follower of the base, and the name emitter follower appeared and was used.
The output voltage of an emitter follower is?
the same as the base minus Vbe drop. used for more power transfer
Why a capacitor is used for amplification in common emitter circuit?
A: The ratio of emitter/collector resistance is the gain. by adding a capacitor on the emitter the AC parameters will shift as a function of frequency
Why bypass capacitor is used in common emitter ampifier circuit?
If a bypass capacitor is used the voltage drop across emitter resistance is reduced which in turn increases the gain.....
Can a transister base-emitter junction be used as a zener diode?
No, the doping profile is entirely wrong. Also some transistors have very low reverse breakdown voltage on the BE junction and will burn out!
Which quantity does a transister amplify?
Depends on the circuit the transistor is used in:it can amplify voltageit can amplify currentit can amplify power
Function of transister?
transister is the electronic divice used for correct current flow
What are three configurations that can be used with FET devices?
configurations of Common-source (CS), Common-drain (CD) or Source-follower (SF) and the Common-gate (CG) available for most FET devices. These three JFET amplifier configurations correspond to the common-emitter, emitter-follower and the common-base configurations using bipolar transistors.
How can a transister can amplify the voltages?
When it's assembled into a circuit with other components and a power supply, atransistor can be used to amplify changes in voltage, but it can't amplify voltages.
