Contents
What is the advantage of voltage follower?
Advantages of Voltage Followers Provides power gain and current gain. Low output impedance to the circuit, which uses the output of the voltage follower. The Op-amp takes zero current from the input. Loading effects can be avoided.
What is its advantage over the emitter follower circuit?
The advantage of this circuit is that the transistor can provide current and power gain; the transistor draws little current from the input. It provides low output impedance to any circuit using the output of the follower, meaning that the output will not drop under load.
What are the advantages and usages of an emitter follower?
The emitter follower or common collector circuit provides an ideal buffer amplifier and it is easy to design the circuit. The common collector circuit configuration is more widely known as the emitter follower and it provides a high input impedance and a low output impedance.
What are the advantages and uses of voltage follower?
A voltage follower uses an op-amp to set the voltage on the output to be the same as the voltage on the input. It does however have limited drive capability. An emitter follower on the other hand drives or sources current to the output so that said output is a base emitter voltage different from the base voltage.
Why do you need an emitter follower in a circuit?
An emitter follower configuration gives you the advantage of getting an output that becomes controllable at the base of the transistor. And therefore this can be implemented in various circuit applications demanding a customized voltage controlled design.
When is an emitter-follower used in a BJT circuit?
In a BJT configuration when the emitter terminal is used as the output, the network is called an emitter-follower. In this configuration the output voltage is always a shade lower than the input base signal due to the inherent base to emitter drop. In simple terms, in this type of transistor circuit the emitter seems to be following
Why are voltage followers used in op amp circuit?
An op amp circuit is a circuit with a very high input impedance. This high input impedance is the reason voltage followers are used. This will now be explained. When a circuit has a very high input impedance, very little current is drawn from the circuit. If you know ohm’s law, you know that current, I=V/R.