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






2. The rotational rate of a phasor which is related to the frequency of the sine wave that the phasor represents






3. 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.






4. Having two opposites charge carriers within the transistor structure






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






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






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






8. A complex programmable logic device that consists basically of muliple SPLD arrays with programmable interconnections.






9. The smallest particle of an element possessing the unique characteristics of that element.






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






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

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12. A two terminal circuit containing voltage sources - current sources - and resistors can be modeled as a voltage source in series with a resistor






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






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






15. A notational system for logic symbols that specifies input and output relationships thus fully defining a given function






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






17. A programming language that uses English like words and has a one- to- one correspondence to machine language






18. American Standard Code for Information Interchange; the most widely used alphanumeric code.






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






20. Stands for Complementary Metal-Oxide Semiconductor and is implemented with a type of field transistor






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






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






23. 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.






24. A nominally continuous electrical signal that varies in amplitude or frequency in response to changes in sound - light - heat - position - or pressure.






25. Information in numeric - alphabetic - or other form.






26. A set of interconnections that interface one or more devices based on a standardized specification






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






28. The process of converting an analog signal to digital form






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






30. One of the three regions in a bipolar junction transistor






31. Sum of all currents entering a node is equal to the sum of all currents leaving the same node

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






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






34. In a PLD - a matrix formed by rows of product- term lines columns of input lines with a programmable cell at each junctions. In VHDL - an array is an ordered set of individual items called elements with a single identifier name.






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






36. The process or sequence of operations carried out to program a target device






37. Digital Signal Processor; a special type of microprocessor that processes data in real time






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






39. 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






40. 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






41. An asynchronous input used to reset a flip- flop (make the Q output 0); to place a register or counter in the state in which it contains all 0's






42. The action of a circuit in which it accepts current into its output from a load






43. A VHDL feature that can be used to predefine the logic function for multiple use throughout a program or programs






44. Having two values or states; describes a number system that has a base of two and utilizes 1 and 0 as its digits






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






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






47. One of the three regions in a bipolar Junction transistor(North junction of NpN)






48. A program that translates an assembly language program for one type of microprocessor to an assembly language for another type of microprocessor






49. Describes a number system with a base of ten






50. 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







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