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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. American wire gauge; a standardization based on wire diameter






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






3. 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.






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






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






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






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






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






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






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






11. In Boolean algebra - the OR operation






12. A digital counter having ten states






13. A combined coder and decoder






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






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






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






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






18. The actual current in a branch






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






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






21. A circuit (digital service) that switches digital data from one input line to several output lines in a specified time sequence






22. Describes a number system with a base of ten






23. 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






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






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






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






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






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






29. Dual in - line memory module






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






31. An electrical instrument used to measure current






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






33. Altera HDL; a nonstandard HDL






34. In Boolean algebra - the AND operation






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






36. 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






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






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






39. 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.






40. 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.






41. Having two opposites charge carriers within the transistor structure






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 current left after the total load current is subtracted from the total current into the circuit






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






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






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






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






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






49. 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






50. The application of a dc voltage to an electronic device to produce a desired mode of operation