Relation between different currents in a transistor:
The total current flowing into transistor should be equal to the total current flowing out of it. Hence, the emitter current IE is equal to the sum of the collector (IC ) and base current (IB). That is,
IE = IC + IB
The currents directions are positive directions. The total collector current IC is made up of the two components.
1. The fraction of emitter current which reaches the collector (αdc IE)
2. The normal reverse leakage current ICO
![2284_relation between current and transistor.png](https://www.expertsmind.com/../CMSImages/2284_relation between current and transistor.png)
αdc is the large signal current gain or dc alpha. It is always positive in nature. Since collector current is almost equal to the IE therefore αdc IE varies from 0.9 to 0.98. Usually, the reverse leakage current is quite small as compared to the total collector current.
![2200_relation between current in transistor.png](https://www.expertsmind.com/../CMSImages/2200_relation between current in transistor.png)
NOTE: The forward bias on the emitter diode controls the number of free electrons infected into the base. The larger (VBE) forward voltage, the greater the number of injected electrons. The reverse bias on the collector diode has little influence on the number of electrons that enter the collector. Increasing VCB does not change the number of free electrons arriving at the collector junction layer.
The symbol of NPN and PNP transistors are shown in the figure.
![1229_relation between current in transistor1.png](https://www.expertsmind.com/../CMSImages/1229_relation between current in transistor1.png)
Figure
Email based Electronics Devices and circuits assignment help - homework help at Expertsmind
Are you searching Electronics Engineering assignment help expert for help with Relation between Current in Transistors questions? Relation between Current in Transistors topic is not easier to learn without any external help? We at www.expertsmind.com offers free lecture notes for Electronics Devices and circuits assignment help and Electronics Devices and circuits homework help. Live tutors are available 24x7 hours for helping students in their Relation between Current in Transistors related problems. We provide step by step Relation between Current in Transistors question's answers with 100% plagiarism free content. We prepare quality content and notes for Relation between Current in Transistors topic under Electronics Devices and circuits theory and study material. These are avail for subscribed users and they can get advantages anytime.
Why Expertsmind for assignment help
- Higher degree holder and experienced experts network
- Punctuality and responsibility of work
- Quality solution with 100% plagiarism free answers
- Time on Delivery
- Privacy of information and details
- Excellence in solving electronics engineering questions in excels and word format.
- Best tutoring assistance 24x7 hours