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






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






3. Dual in - line memory module






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






5. 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.






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






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






8. 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.






9. 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.






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






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






12. 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






13. 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.






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






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






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






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






18. The maximum value of a voltage or current






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






20. 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.






21. 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






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






23. Having two opposites charge carriers within the transistor structure






24. 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






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






26. 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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27. Altera HDL; a nonstandard HDL






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






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






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






31. A receiving device on a bus






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






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






34. The unit of electrical current






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






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






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






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






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






40. The opposition of a capacitor to permit current; the reciprocal of capacitive reactance. The unit is the siemens.






41. A class of integrated logic circuits that is implemented with a type of field effect transistor






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






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






44. A logic gate that produces a High output only when all of the inputs are HIGH






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






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






47. A type of PLD nonvolatile programmable link that can be left open or can be shorted once as directed by the program






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






49. 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






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







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