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






2. Burst extended data output dynamic random- access memory






3. 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






4. A type of semiconductor memory having capacitive storage cells that lose stored data over a period of time and therefore must be refreshed.






5. 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.






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






7. Dual in - line memory module






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






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






10. The beginning address of a segment of memory






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






12. The maximum value of a voltage or current






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






14. The mathematics of logic circuits






15. 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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16. The ability of a capacitor to store electrical charge.






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






18. A semiconductor device that conducts current in only one direction






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






20. A set of conductive paths hat connects the CPU to other parts of the computer to coordinate its operations and to communicate with external devices






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






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






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

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






25. 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.






26. The location of a given storage cell or group of cells in a memory; a unique memory location containing on byte






27. An adverse condition that could occur if two or more devices try to communicate at the same time on a bus






28. A type of semiconductor memory that stores data in the form of charge packets and is serially accessed






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

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






31. Having two opposites charge carriers within the transistor structure






32. A combined coder and decoder






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






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






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






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






37. Characteristic of cells in a Karnaugh map in which there is a single- variable change from one cell to another cell next to it on any of its four sides






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






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






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






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






42. 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






43. 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






44. One current path in a parallel circuit; a current path that connects two nodes






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






46. A digital counter having ten states






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






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






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






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