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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 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






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






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






4. In Boolean algebra - the AND operation






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






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






7. A basic logic operation in which a true(high) output occurs only when all the input conditions are true (high)






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






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






10. Data Communications equipment






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






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






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






14. A bridge circuit that is in the balanced state as indicated by 0 V across the output.






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






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






17. A notational system for logic symbols that specifies input and output relationships thus fully defining a given function






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






19. 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.






20. Burst extended data output dynamic random- access memory






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






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






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






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






25. 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






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






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






28. The ratio of pulse width to period expressed as a percentage






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






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






31. The mathematics of logic circuits






32. An electrical instrument used to measure current






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






34. 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.






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






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






37. 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






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






40. An application program in development software packages that controls the design flow process and translates source code into object code in a format that can be logically tested or downloaded to a target device






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






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






43. American National Standards Institute






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






45. The current left after the total load current is subtracted from the total current into the circuit






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

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47. A combination of input literals that cannot occur and can be used as a 1 or 0 on a Karnaugh Map for simplification

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48. A type of magnetic tape format






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






50. 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.







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