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Digital Fundamentals

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. American Standard Code for Information Interchange; the most widely used alphanumeric code.






2. A stage of the DSP pipeline operation in which instructions are assigned to functional units and are decoded.






3. American National Standards Institute






4. A class of integrated logic circuits that is implemented with a type of field effect transistor






5. An array of AND gates consisting of a matrix of programmable interconnection






6. Having two stable states. Flip- flops and latches are bistable multivibrators.






7. A digital code in which each of the decimal digits - 0 through 9 - is represented by a group of four bits






8. A condition where all the load currents are equal and the neutral current is zero






9. The VHDL unit that describes the internal operation of a logic function; the internal functional arrangement of the elements that give a device its particular operating characteristics.






10. A transformer in which the primary and secondary are in a single winding






11. A relatively small - high- speed memory that stores the most recently used instructions or data from the larger but slower main memory






12. A unit of the cross - sectional area of a wire.






13. A circuit that selects data from several inputs one at a time in a sequence and places them on the output; also called a multiplexer.






14. A type of bistable multivibrator in which the output assumes the state of the D input on the triggering edge of a clock pulse.






15. A digital counter having ten states






16. A digital circuit that compares the magnitudes of two quantiities and produces an output indicating the relationship of the quantities






17. A combination of input literals that cannot occur and can be used as a 1 or 0 on a Karnaugh Map for simplification

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18. A type of inductor used to block or choke off high frequencies






19. Having no stable state. An astable multivibrator oscillates between two quasi- stable states.






20. The application of a dc voltage to an electronic device to produce a desired mode of operation






21. A program that converts English- like mnemonics into machine code






22. An energy source that uses a chemical reaction to convert chemical energy into electrical energy.






23. A resettable protective device used for interrupting execessive current in an electric circuit






24. Having two opposites charge carriers within the transistor structure






25. A basic logic operation in which a true(high) output occurs only when all the input conditions are true (high)






26. Consisting of numerals - letters - and other characters






27. A bridge circuit that is in the balanced state as indicated by 0 V across the output.






28. The process that prevents two sources from using a bus at the same time






29. The inverse of opposite of a number - in Boolean algebra - the inverse function - expressed with a bar over the variable. The complement of a 1 is a 0 - and vice versa






30. A reduction of the output signal compared to the input signal - resulting in a ratio with a value of less than 1 for the output voltage to the input voltage of a circuit.






31. Dual in - line memory module






32. A combined coder and decoder






33. The main part of a computer responsible for control and processing of data; the core of a DSP that processes the program instructions






34. A type of counter in which each stage is clocked from the output of the preceding stage.






35. The digit generated when the sum of two binary digits exceeds 1






36. In relation to VHDL feature that permits operations to be processed in a parallel;that is operations that occur simultaneously






37. A type of IC package whose leads must pass through holes to the other side of a PC board






38. The current left after the total load current is subtracted from the total current into the circuit






39. The mathematics of logic circuits






40. A type of PLD nonvolatile programmable link that can be left open or can be shorted once as directed by the program






41. A group of eight bits






42. In Boolean algebra - the OR operation






43. The process of rippling an input carry to become the output carry in a full- adder when either or both of the input bits are 1's and the input carry is a 1






44. To decrease the binary state of a counter by one






45. A digital circuit device that converts coded information into another (familiar) or noncoded form






46. Describes a number system with a base of ten






47. A logic circuit used to add two binary numbers






48. In a pulse waveform - the height or maximum value of the pulse as measured from its low level.






49. In addition (ORing) and multiplication (ANDing) of two variables the order in which the variables are ORed or ANDed makes no difference






50. The basic timing signal in a digital system; a periodic waveform in which the interval between pulses equals the time for one bit; the triggering input of a flip- flop