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Home Digital Electronics Code Converters and Multiplexers Comments

  • Question
  • A circuit that responds to a specific set of signals to produce a related digital signal output is called a(n):


  • Options
  • A. BCD matrix
  • B. display driver
  • C. encoder
  • D. decoder

  • Correct Answer
  • encoder 


  • Code Converters and Multiplexers problems


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    • 1. Use the weighting factors to convert the following BCD numbers to binary.

      0101 0011        0010 0110 1000


    • Options
    • A. 01010011    001001101000
    • B. 11010100    100001100000
    • C. 110101        100001100
    • D. 101011        001100001
    • Discuss
    • 2. From the following list of input conditions, determine the state of the five output leads on a 74148 octal-to-binary encoder.

      I0 = 1 I3 = 1 I6 = 1
      I1 = 1 I4 = 0 I7 = 1
      I2 = 1 I5 = 1 EI = 0

    • Options
    • A. GS = L, A0 = L, A1 = L, A2 = H, EO = H
    • B. GS = L, A0 = H, A1 = L, A2 = L, EO = H
    • C. GS = L, A0 = L, A1 = H, A2 = L, EO = H
    • D. GS = L, A0 = H, A1 = H, A2 = L, EO = H
    • Discuss
    • 3. Why can a CMOS IC be used as both a multiplexer and a demultiplexer?

    • Options
    • A. It cannot be used as both.
    • B. CMOS uses bidirectional switches.
    • Discuss
    • 4. A basic multiplexer principle can be demonstrated through the use of a:

    • Options
    • A. single-pole relay
    • B. DPDT switch
    • C. rotary switch
    • D. linear stepper
    • Discuss
    • 5. Which digital system translates coded characters into a more useful form?

    • Options
    • A. encoder
    • B. display
    • C. counter
    • D. decoder
    • Discuss
    • 6. How many select lines would be required for an 8-line-to-1-line multiplexer?

    • Options
    • A. 2
    • B. 3
    • C. 4
    • D. 8
    • Discuss
    • 7. What control signals may be necessary to operate a 1-line-to-16 line decoder?

    • Options
    • A. flasher circuit control signal
    • B. a LOW on all gate enable inputs
    • C. input from a hexadecimal counter
    • D. a HIGH on all gate enable circuits
    • Discuss
    • 8. In a BCD-to-seven-segment converter, why must a code converter be utilized?

    • Options
    • A. to convert the 4-bit BCD into 7-bit code
    • B. to convert the 4-bit BCD into 10-bit code
    • C. to convert the 4-bit BCD into Gray code
    • D. No conversion is necessary.
    • Discuss
    • 9. When two or more inputs are active simultaneously, the process is called:

    • Options
    • A. first-in, first-out processing
    • B. priority encoding
    • C. ripple blanking
    • D. first-in, first-out processing or priority encoding
    • Discuss
    • 10. A microcontroller differs from a microprocessor in that it has several ________ ports and ________ built into its architecture, making it better suited for ________ applications.

    • Options
    • A. communication, PROMs, control
    • B. parallel, logic gates, processing
    • C. input/output, memory, control
    • D. data, memory, decoding
    • Discuss


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