Physics Exam > Physics Videos > Crash Course for IIT JAM Physics > RE Model for Emitter Follower Configuration, AC Analysis- 7
RE Model for Emitter Follower Configuration, AC Analysis- 7 Video Lecture | Crash Course for IIT JAM Physics
FAQs on RE Model for Emitter Follower Configuration, AC Analysis- 7 Video Lecture - Crash Course for IIT JAM Physics
| 1. What is the purpose of the emitter follower configuration? |  |
Ans. The emitter follower configuration is used to provide a high input impedance and a low output impedance. It is commonly used as a buffer amplifier to isolate the input and output circuits, and to provide impedance matching between different stages of a circuit.
| 2. How does the emitter follower circuit work? | |
Ans. In the emitter follower circuit, the input signal is applied to the base of the transistor, while the output is taken from the emitter. The transistor acts as a voltage buffer, where the emitter voltage follows the base voltage minus a diode drop. This configuration provides a low output impedance and a high voltage gain.
| 3. What is the AC analysis of the emitter follower configuration? | |
Ans. The AC analysis of the emitter follower configuration involves analyzing the small-signal behavior of the circuit. This includes determining the voltage gain, input impedance, and output impedance. The analysis typically involves using small-signal models and applying AC equivalent circuit techniques.
| 4. How do you calculate the voltage gain of the emitter follower circuit? | |
Ans. The voltage gain of the emitter follower circuit is approximately unity. This means that the output voltage follows the input voltage with minimal voltage gain. The voltage gain can be calculated by dividing the change in output voltage by the change in input voltage.
| 5. What are the advantages of using an emitter follower configuration? | |
Ans. The advantages of using an emitter follower configuration include high input impedance, low output impedance, and unity voltage gain. It provides isolation between input and output circuits, prevents loading effects, and can be used for impedance matching. Additionally, it has a low distortion and a high current gain.
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Dec 27, 2024 Last updated |
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