Why common collector configuration is used?

Why common collector configuration is used?

The common collector or grounded collector configuration is generally used where a high impedance input source needs to be connected to a low impedance output load requiring a high current gain. Consider the common collector amplifier circuit below.

What is the advantage of adding a common collector stage to an amplifier?

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 of common collector?

➢ The common-collector (CC) amplifier is usually referred to as an emitter-follower (EF). The input is applied to the base through a coupling capacitor, and the output is at the emitter. The voltage gain of a CC amplifier is approximately 1, and its main advantages are its high input resistance and current gain.

What is a common collector configuration?

Definition: The configuration in which the collector is common between emitter and base is known as CC configuration. The collector is common to both the input and output circuit and hence the name common collector connection or common collector configuration. …

What are the advantages and disadvantages of a common emitter?

The advantages of a common emitter amplifier include the following.

• The common emitter amplifier has a low input impedance and it is an inverting amplifier.
• The output impedance of this amplifier is high.
• This amplifier has the highest power gain when combined with medium voltage and current gain.

What is a common collector amplifier called?

The common collector amplifier is also called the emitter follower amplifier because the output voltage signal at the emitter is approximately equal to the voltage signal input on the base.

What is common collector connection?

Definition: The configuration in which the collector is common between emitter and base is known as CC configuration. In CC configuration, the input circuit is connected between emitter and base and the output is taken from the collector and emitter.

What can a common collector amplifier be used for?

Figure 1: Basic NPN common collector circuit (neglecting biasing details). In electronics, a common collector amplifier (also known as an emitter follower) is one of three basic single-stage bipolar junction transistor (BJT) amplifier topologies, typically used as a voltage buffer.

What’s the difference between Class A and AB amplifiers?

Class A: – The amplifiers single output transistor conducts for the full 360 o of the cycle of the input waveform. Class B: – The amplifiers two output transistors only conduct for one-half, that is, 180 o of the input waveform. Class AB: – The amplifiers two output transistors conduct somewhere between 180 o and 360 o of the input waveform.

Why are class AB amplifiers cannot be used in push pull configuration?

The main reason why this configuration cannot be used for class AB amplifiers is that the set of values of the resistors will only work for a particular push-pull configuration. Moreover, the set of values needs to be chosen very carefully, specially if the complementary transistors are different.

What is base resistance of common collector amplifier?

Moreover, the base resistance can as well be expressed RB=Ω.RE which leads to a very high input impedance.