Question 1: What is a common?source amplifier? Explain its operation. Support your answer with figures, equations, and an example.
Question 2: The 2N5459 JFET has the following ratings: gm0 = 600A????1s and VGS (off ) = ?8 Volts. Determine the values of gm for this device at VGS = ?3 Volts and at VGS = ?5 Volts.
Question 3: A JFET has the following ratings: gm0 = 4000A????1s at VGS (off ) = ?6 Volts and gm0 = 2000A????1s at VGS (off ) = ?2 Volts. The component is used in a common?source amplifier with values of RD = 3.3 K?, RL = 4.7 K?, and VGS = ?750 millivolts to ?3.5 Volts. Compute the maximum and minimum values of the amplifier voltage gain Av for the given circuit.
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