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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 process of producing an output carry in full- adder when both input bits are 1s.






2. 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






3. A bidirectional set of conductive paths on which data or instruction codes are transferred into a microprocessor or on which the result of an operation is sent out from the microprocessor






4. In addition - the number that is added to another number called the augend






5. 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






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


7. Having no stable state. An astable multivibrator oscillates between two quasi- stable states.






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






9. 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.






10. A software compiler language for SPLD programming; a type of hardware description language (HDL)






11. 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






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






13. 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






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






15. 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






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






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






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






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






20. 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.






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






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






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






24. Characterized by ten states or values






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






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






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






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






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






30. A digital counter having ten states






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






32. An expression of variables and operators used to express the operation of a logic circuit






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






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






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






36. A circuit that prevents loading of an input or output






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






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






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






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






41. A binary digit - which can be either 1 or 0






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






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






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






45. The process or sequence of operations carried out to program a target device






46. 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






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






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






49. A receiving device on a bus






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