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






2. A document that specifies parameter values and operating conditions for an integrated circuits or other device






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






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






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






6. A digital counter having ten states






7. The time from the application of a valid memory address to the appearance of valid output data






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






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






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






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






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






13. A type of magnetic tape format






14. 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.






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






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






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






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






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






21. The maximum value of a voltage or current






22. The graph of a filter's frequency response showing the change in the output voltage to input voltage ratio expressed in dB as a function of frequency for a constant input voltage






23. In Boolean algebra - the AND operation






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






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






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

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






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






29. A circuit with a complete current path






30. Having two directions. the stored data can be shifted right or left






31. The mathematics of logic circuits






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






33. A stage of the DSP pipeline operation in which instructions are assigned to functional units and are decoded.






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






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






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 relatively small - high- speed memory that stores the most recently used instructions or data from the larger but slower main memory






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






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

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






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






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






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






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






45. In addition (Oring) and multiplication (ANDing) of three or more variables - the order in which the variables are grouped makes no difference






46. The unit of electrical current






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






48. 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.






49. 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






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