Table of Contents
What is the significance of the output characteristics of the transistors in CE configuration?
The current gain of a transistor in CE configuration is defined as the ratio of output current or collector current (IC) to the input current or base current (IB). The current gain of a transistor in CE configuration is high. Therefore, the transistor in CE configuration is used for amplifying the current.
What is the characteristics of BJT?
Bipolar Transistor Configurations
| Characteristic | Common Base | Common Collector |
|---|---|---|
| Input Impedance | Low | High |
| Output Impedance | Very High | Low |
| Phase Shift | 0o | 0o |
| Voltage Gain | High | Low |
Why common emitter transistor configuration is widely used for voltage amplification draw its input and output characteristics?
The common emitter circuit configuration provides voltage gain combined with a moderate current gain, as well as a medium input and a medium output impedance. As such the common emitter configuration is a good all round circuit for use in many applications. In other words it has a 180° phase change across the circuit.
How is VCE calculated?
Calculate Vce using the formula Vce= Vcc – [Ie * (Rc + Re)]. Using the numbers from the previous examples, the equation works as follows: Vce = 12 – 0.00053 (3000 + 7000) = 12 – 5.3 = 6.7 volts.
Why does Ib increase IC?
To neutralize the p region an electron leaves the p region. If we take it the other way round, the larger the base current the greater is the recombination, so the collector current should reduce, but Beta Ic/Ib. Ic=BetaxIb, which shows that Ib is directly proportional to Ic.
Why voltage and current are kept constant in ce mode?
In order to know why voltage is kept constant for input characteristics and current is kept constant for output characteristics in CE mode, first we have to know the hybrid parameters and its model. The hybrid parameters are generally used to determine amplifier characteristic parameters such as voltage gain, input and output resistance etc.
How do you find the input characteristics of a transistor?
The input characteristic of a transistor is obtained between the inputs current IB and the input voltage VB by having a constant output voltage VCE. By keeping the output voltage VCE constant and changing the input voltage VBE of different points, we can examine the values of the input current of each of the points.
How does a constant current (CC) converter work?
A constant current (CC) converter regulates current the same way: the control loop adjusts the duty cycle to maintain a constant output current regardless of changes to the input voltage and output resistance.
What is CV and CC mode in a power supply?
When the load connected draws current less than 1 A, the power supply will maintain voltage control in CV mode. If the load draws current at 1 A, the supply will automatically switch to CC mode. In these cases, the current will output at 1 A or at the current limit, while the voltage will decrease down to a value that’s dependent on the load.