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






2. A logic circuit used to add two binary numbers






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






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






5. 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.






6. Altera HDL; a nonstandard HDL






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






8. A software compiler language for SPLD programming; a type of hardware description language (HDL)






9. The maximum value of a voltage or current






10. The beginning address of a segment of memory






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






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






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






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






15. Digital audio tape; a type of magnetic tape format






16. A electrical property of matter that exist because of an excess or a deficiency of electrons. Can be either positive or negative






17. 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.






18. 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.






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






20. A connection at the midpoint of a winding in a transformer






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






22. 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






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






24. A combined coder and decoder






25. A theorem that states that any amount of voltage sources and current sources can be combined into a single current source with a parallel resistor.

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26. Dynamic random- access memory; a type of semiconductor memory that uses capacitors as the storage elements and is a volatile - read/write memory






27. 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.






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






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






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






31. 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






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






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






34. A circuit that prevents loading of an input or output






35. Describes a number system with a base of ten






36. The law that states ORing several variables and then ANDing the single variable with each of the several variables and the ORing the product






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






38. A combination of logic gates interconnected to produce a specified Boolean function with no storage or memory capability; sometimes called combinatorial logic






39. The mathematics of logic circuits






40. Data Communications equipment






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






42. Voltage Divider Rule in determining TEC Thevenin Equivalence Circuit






43. Bipolar junction transistor; a semiconductor device used for switching or amplification. A BJT has two junctions - the base- emitter junction and the base- collector junction






44. In a division operation the quantity that is being divided






45. An electrical instrument used to measure current






46. The average of a sine wave over one half- cycle. It is 0.637 times the peak value.






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






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






49. The ability of a capacitor to store electrical charge.






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






Can you answer 50 questions in 15 minutes?



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