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Digital Fundamentals

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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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. Arithmetic Logic Unit; the key processing element of a microprocessor that perfoms arithmetic and logic operations.






2. An arrangement of electrical and/or electronic components interconnected in such a way as to perform a specified function






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






4. The mathematics of logic circuits






5. 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






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






7. Characterized by ten states or values






8. Basic input/output system; a set of programs in ROM that interfaces the I/) devices in a computer system






9. The range of frequencies for which the current (or output voltage) is equal to or greater than 70.7% of its value at the resonant frequency that is considered to be passed by a filter.






10. Describes a number system with a base of ten






11. Sum of all the voltage drops in series equals to the source voltage

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12. The phasor combination of resistive power (true power) and reactive power. The unit is the volt- amperes (VA).






13. A digital circuit capable of counting electronic events - such as pulses - by progressing through a sequence of binary states.






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






15. To connect 'end- to- end' as when several counters are connected from the terminal count output of one counter to the enable input of the next counter






16. 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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17. A unit of logic in an FPGA that is made up of multiple smaller logic modules and a local programmable interconnect that is used to connect logic modules within the CLB






18. Having two directions. the stored data can be shifted right or left






19. Having two opposites charge carriers within the transistor structure






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






21. Consisting of numerals - letters - and other characters






22. A method of analog- to- digital conversion using a 1- bit quantization process






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






24. An application program in development software packages that controls the design flow process and translates source code into object code in a format that can be logically tested or downloaded to a target device






25. The ratio of pulse width to period expressed as a percentage






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






27. An instrument that can specify each of the other instruments on the bus as either a talker or a listener for the purpose of data transfer.






28. A number given in ampere- hours determined by multiplying the current times the length of the time (h) a battery can deliver that current to a load






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






30. An electrical device consisting of two conductive plates separated by an insulating material and possessing the property of capacitance.






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






32. The process of producing an output carry in full- adder when both input bits are 1s.






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






34. In addition - the number to which the addend is added






35. A series of bits describing a final design that is sent to the target device during programming






36. A digital counter having ten states






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






38. Voltage Divider Rule in determining TEC Thevenin Equivalence Circuit






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






40. The effect created when a signal is sampled at less than twice the signal frequency. Aliasing creates unwanted frequencies that interfere with the signal frequency.






41. 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






42. A filter that rejects a range of frequencies lying between two critical frequencies and passes frequencies above and below that range.






43. A method for the automated testing of printed circuit boards in which the board is mounted on a fixture that resembles a bed of nails that makes contact with test points






44. The number of protons in a nucleus






45. American National Standards Institute






46. The interval of time occupied by a single bit in a sequence of bits; the period of the clock






47. The graph of a filter's frequency response showing the change in the output voltage to input voltage ratio expressed in dB as a function of frequency for a constant input voltage






48. A method for internally testing a PLD based on the JTAG standard (IEEE std.)






49. An expression of variables and operators used to express the operation of a logic circuit






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







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