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Fahad Mehmood
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I just want detail information about BJT circuits
Fahad Mehmood said:I just want detail information about BJT circuits
Fahad Mehmood said:Power Amplifier and Classification of Power Amplifier
berieamu said:i want a detailed note on bjt biasing
See my two attachments in post #3 for a npn BJT biasing example.berieamu said:i want a detailed note on bjt biasing
A BJT (Bipolar Junction Transistor) circuit configuration is a specific arrangement of one or more BJTs in a circuit to perform a desired function, such as amplification or switching. It determines the connections between the BJT's terminals and the other components in the circuit.
The three types of BJT circuit configurations are common emitter, common collector (also known as emitter follower), and common base. Each configuration has its own advantages and disadvantages, making it suitable for different applications.
In a common emitter circuit, the BJT's emitter terminal is connected to a common ground, while the input signal is applied to the base terminal and the output is taken from the collector terminal. The emitter current is amplified by the BJT and results in a larger collector current, making it suitable for amplification purposes.
The common collector circuit configuration has a high input impedance and a low output impedance, making it suitable for impedance matching and voltage buffering. It also provides a unity gain between the input and output, making it useful for signal amplification without affecting the input signal.
The choice of BJT circuit configuration depends on the specific requirements of the application. Common emitter configuration is suitable for high power amplification, common collector for impedance matching, and common base for high frequency applications. It is important to consider the input and output impedance, gain, and frequency response when selecting a BJT circuit configuration.