Key Topic 40: Counter, Dividers, Converters

Question 1

3-40E1: What is the purpose of a prescaler circuit?

A. Converts the output of a JK flip-flop to that of an RS flip-flop.
B. Multiplies an HF signal so a low-frequency counter can display the operating frequency.
C. Prevents oscillation in a low frequency counter circuit.
D. Divides an HF signal so that a low-frequency counter can display the operating frequency.

Answer 1

D. Divides an HF signal so that a low-frequency counter can display the operating frequency.

Question 2

3-40E2: What does the term “BCD” mean?

A. Binaural coded digit.
B. Bit count decimal.
C. Binary coded decimal.
D. Broad course digit.

Answer 2

C. Binary coded decimal.

Question 3

3-40E3: What is the function of a decade counter digital IC?

A. Decode a decimal number for display on a seven-segment LED display.
B. Produce one output pulse for every ten input pulses.
C. Produce ten output pulses for every input pulse.
D. Add tow decimal numbers.

Answer 3

B. Produce one output pulse for every ten input pulses.

Question 4

3-40E4: What integrated circuit device converts an analog signal to a digital signal?

A. DAC
B. DCC
C. ADC
D. CDC

Answer 4

C. ADC

Question 5

3-40E5: What integrated circuit device converts digital signals to analog signals?

A. ADC
B. DCC
C. CDC
D. DAC

Answer 5

D. DAC

Question 6

3-40E6: In binary numbers, how would you note the quantity TWO?

A. 0010
B. 0002
C. 2000
D. 0020

Answer 6

A. 0010