4. A JFET can be used in a common?gate amplifier configuration. With the support

Question

4. A JFET can be used in a common?gate amplifier configuration. With the support of figures, equations, and an example, explain the concept of a common?gate amplifier.

5. What are the three most commonly used biasing techniques for a JFET? Using figures compare these three JFET biasing circuits in the context of their schematic diagrams, dc bias lines, advantages, and disadvantages.

6. (a) A BJT has values of IB= 35 ?A and Bdc = 100. Determine IC and IE for this device.

(b) A BJT has a value of Bdc = 350. Determine the value of ?dc for such a device.

Explanation / Answer

4) The Common Source JFET Amplifier

So far we have looked at the bipolar type transistor amplifier and especially the common emitter amplifier, but small signal amplifiers can also be made using Field Effect Transistors or FET

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