Exam 9: Fet Amplifiers and Switching Circuits
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Figure 4 The spec sheet shows IGSS = 200 nA (max)at VGS = -15 V and VDS = 0 V.
-Refer to Figure 4. Assume the voltage gain is 0.92. The power delivered to the load resistor is
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Correct Answer:
A
To form an ac equivalent circuit for a FET amplifier, VDD is assumed to be open.
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Figure 7
-Refer to Figure 7. If both VA and VB are low (0), then both
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Correct Answer:
D
Figure 7
-Refer to Figure 7. The logic circuit represented is a
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Assume a self- biased JFET amplifier has IGSS = 10 nA, VGS = 1 V, and RG = 10 M▲. The input resistance, RIN, of the amplifier is
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Figure 1 The equation for gm is given in (b).
-Refer to Figure 1. Assume an unbypassed 36 ▲ resistor is inserted in series with RS. This primary effect of this change is to cause
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Figure 4 The spec sheet shows IGSS = 200 nA (max)at VGS = -15 V and VDS = 0 V.
-Refer to Figure 4. The input resistance, RIN, assuming maximum IGSS is
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Figure 3 RS provides feedback for bias stability
-Refer to Figure 3. If you are troubleshooting the ac signal and find the output is three times larger than expected and clipped. This could be caused by
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A common- drain (CD)amplifier is also called a source- follower.
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In pulse width modulation, the output pulses are proportional to the
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Figure 3 RS provides feedback for bias stability
-Refer to Figure 3. Assume you are troubleshooting dc voltages with no signal input. You find that VDD = VD = 15 V. This could be caused by
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Figure 1 The equation for gm is given in (b).
-Refer to Figure 1. If C2 were to open,
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In order to sample a waveform that is later reconstructed, the minimum sampling rate must be equal to
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Figure 1 The equation for gm is given in (b).
-Refer to Figure 1. The specification sheet indicates that gm0 is 8500 µS and VGS(off)is -2.5 V. Assume VGS = -1 V. The expected gain, Av, is
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