Contents
- 1 What is the output voltage and current in CE configuration?
- 2 What is the equation of collector current in CB configuration of transistor?
- 3 What is the power gain of CB configuration?
- 4 What are the configuration of CB and CE transistors?
- 5 How is current gain determined in a transistor?
- 6 Which is the output current in a transistor?
What is the output voltage and current in CE configuration?
In this region, both junctions are reverse biased. Next, the input current (IB) is increased from 0 μA to 20 μA by adjusting the input voltage (VBE). The input current (IB) is kept constant at 20 μA. While increasing the input current (IB), the output voltage (VCE) is kept constant at 0 volts.
What is the equation of collector current in CB configuration of transistor?
The current gain for a CB configuration is called Alpha, ( α ). In a BJT amplifier the emitter current is always greater than the collector current as IE = IB + IC, the current gain (α) of the amplifier must therefore be less than one (unity) as IC is always less than IE by the value of IB.
What is the current amplification factor in CE and CB configuration?
The ratio of change in emitter current (ΔIE) to the change in base current (ΔIB) is known as Current Amplification factor in common collector (CC) configuration. It is denoted by γ. The current gain in CC configuration is same as in CE configuration. The voltage gain in CC configuration is always less than 1.
What is the power gain of CB configuration?
Comparison between CB CE CC Amplifiers
| Characteristic | CE | CB |
|---|---|---|
| Current gain | B high | α < 1 |
| Voltage gain | High (≈ 1500) | High (≈ 1500) |
| Power gain | High (≈ 10,000) | High (≈ 7500) |
| Phase between input and output | reversed | same |
What are the configuration of CB and CE transistors?
Just as in CB and CE configurations, the emitter junction is forward biased and the collector junction is reverse biased. The flow of electrons is controlled in the same manner. The input current is the base current IB and the output current is the emitter current IE here.
Which is the output current in a CB configuration?
The collector voltage V CB is kept constant throughout this. In the CB configuration, the input current is the emitter current IE and the output current is the collector current IC.
How is current gain determined in a transistor?
This equation is transistor equations for the CE configuration. The ratio of the collector current to that of emitter current gives current gain alpha in the Common Base configuration. Similarly, the ratio of the collector current to that of base current gives current gain beta in the common-emitter configuration.
Which is the output current in a transistor?
IC is the output current. The common emitter configuration is usually based on transistor-based amplifiers. Under this condition, the emitter current is equivalent to the sum of base current and collector current. This equation is transistor equations for the CE configuration.