Key Topic 8: Components-2

Question 1

8-8A1: The basic frequency determining element in a Gunn oscillator is:

A. The power supply voltage.
B. The type of semiconductor used.
C. The resonant cavity.
D. The loading of the oscillator by the mixer.

Answer 1

C. The resonant cavity.

Question 2

8-8A2: Which of the following is not a method of analog-to-digital conversion?

A. Delta-sigma conversion.
B. Dynamic-range conversion.
C. Switched-capacitor conversion.
D. Dual-slope integration.

Answer 2

B. Dynamic-range conversion.

Question 3

8-8A3: When comparing TTL and CMOS logic families, which of the following is true:

A. CMOS logic requires a supply voltage of 5 volts ±20%, whereas TTL logic requires 5 volts ±5%.

B. Unused inputs should be tied high or low as necessary especially in the CMOS family.

C. At higher operating frequencies, CMOS circuits consume almost as much power as TTL circuits.

D. When a CMOS input is held low, it sources current into whatever it drives.

Answer 3

C. At higher operating frequencies, CMOS circuits consume almost as much power as TTL circuits.

Question 4

8-8A4: The primary operating frequency of a reflex klystron is controlled by the:

A. Dimensions of the resonant cavity.
B. Level of voltage on the control grid.
C. Voltage applied to the cavity grids.
D. Voltage applied to the repeller plate.

Answer 4

A. Dimensions of the resonant cavity.

Question 5

8-8A5: A Gunn diode oscillator takes advantage of what effect?

A. Negative resistance.
B. Avalanche transit time.
C. Bulk-effect.
D. Negative resistance and bulk-effect.

Answer 5

D. Negative resistance and bulk-effect.

Question 6

8-8A6: Fine adjustments of a reflex klystron are accomplished by:

A. Adjusting the flexible wall of the cavity.
B. Varying the repeller voltage.
C. Adjusting the AFC control system.
D. Varying the cavity grid potential.

Answer 6

B. Varying the repeller voltage.