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






2. 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.






3. A one- way group of conductors from the to a memory - or other external device - on which the address code is sent






4. The portion of the CPU that interfaces with the system buses and fetches instructions - reads operands - and writes results.






5. Altera HDL; a nonstandard HDL






6. The actual current in a branch






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






8. Characterized by ten states or values






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

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






11. A measure of the ability of a reactive circuit to permit current; the reciprocal of impedance. the unit is the siemens






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






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






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






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






16. Voltage Divider Rule in determining TEC Thevenin Equivalence Circuit






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






18. A interconnection of electrical components designed to produce a desired result. A basic circuits consists of a source - a load and an interconnecting current path.






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






20. A receiving device on a bus






21. The total number of data units(bits - nibbles - bytes - words) that a memory can store.






22. The maximum value of a voltage or current






23. 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.






24. A digital counter having ten states






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






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






27. American wire gauge; a standardization based on wire diameter






28. Data Communications equipment






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






30. Arithmetic Logic Unit; the key processing element of a microprocessor that perfoms arithmetic and logic operations.






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






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






33. The portion within the microprocessor that provides the timing and control signals for getting data into and out of the microprocessor and for synchronizing the execution of instructions.






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






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






36. The unit of electrical current






37. Transistor-Transistor Logic and is implemented with bipolar junction transistors






38. 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






39. 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.






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






41. A device used to convert an analog signal to a sequence of digital codes






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






43. In Boolean algebra - the OR operation






44. 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.






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






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






47. The normal level of a pulse waveform; the voltage level in the absence of a pulse.






48. Data Terminal equipment






49. Having two opposites charge carriers within the transistor structure






50. 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.