COMMON DRAIN AMPLIFIER
Common Drain Amps: Versatile Voltage Gain & High Input Impedance (Gain + Impedance for Signal Strength).
- In the Common Drain Amplifier setup, the drain input is connected to AC ground.
- Between the gate and drain terminals is where the input goes, and between the source and drain terminals is where the output is recorded.
- This type of amplifier is called a Common Drain Amplifier because the drain wire is shared by both the input and output sides.
The Common Drain Amplifier has
- High Input Impedance
- Low Output Impedance
- Sub-unity voltage gain
- Source Follower is another name for this type of output because it follows the information coming in.
- As its output impedance is low, it is used as a buffer to drive loads with low output impedance.
- The source follower frequently serves as an output stage when a multistage amplifier is driving a low-impedance load.
- The picture shows a common drain amplifier (source follower) with a biassing circuit.
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Arul Prasanth - MSc Geology graduate offering comprehensive study materials in Geology, Physics, and English. With a focus on clarity and effectiveness, I aim to provide students with the tools necessary for academic success.
