Key Topic 7: Components-1

Question 1

8-7A1: What component of a RADAR receiver is represented by block 46 in Fig. 8A1?

A. The ATR box.
B. The TR box.
C. The RF Attenuator.
D. The Crystal Detector.

Answer 1

B. The TR box.

Question 2

8-7A2: A basic sample-and-hold circuit contains:

A. An analog switch and an amplifier.
B. An analog switch, a capacitor, and an amplifier.
C. An analog multiplexer and a capacitor.
D. An analog switch, a capacitor, amplifiers, and input and output buffers.

Answer 2

D. An analog switch, a capacitor, amplifiers, and input and output buffers.

Question 3

8-7A3: When comparing a TTL and a CMOS NAND gate:

A. Both have active pull-up characteristics.
B. Both have three output states.
C. Both have comparable input power sourcing.
D. Both employ Schmitt diodes for increased speed capabilities.

Answer 3

A. Both have active pull-up characteristics.

Question 4

8-7A4: Silicon crystals:

A. Are very sensitive to static electric charges.
B. Should be wrapped in lead foil for storage.
C. Tolerate very low currents.
D. All of these.

Answer 4

D. All of these.

Question 5

8-7A5: Which is typical current for a silicon crystal used in a RADAR mixer or detector circuit?

A. 3 mA
B. 15 mA
C. 50 mA
D. 100 mA

Answer 5

A. 3 mA

Question 6

8-7A6: What component of a RADAR receiver is represented by block 47 in Fig. 8A1?

A. The ATR box.
B. The TR box.
C. The RF Attenuator.
D. The Crystal Detector.

Answer 6

D. The Crystal Detector.