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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 digit generated when the sum of two binary digits exceeds 1






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






3. American National Standards Institute






4. The portion within the microprocessor that provides the timing and control signals for getting data into and out of the microprocessor and for synchronizing the execution of instructions.






5. 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.






6. The unit of electrical current






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






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






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






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






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






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






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






14. Stands for Complementary Metal-Oxide Semiconductor and is implemented with a type of field transistor






15. 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.






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






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






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






19. The basic timing signal in a digital system; a periodic waveform in which the interval between pulses equals the time for one bit; the triggering input of a flip- flop






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






21. 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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22. A unit of logic in an FPGA that is made up of multiple smaller logic modules and a local programmable interconnect that is used to connect logic modules within the CLB






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






24. The mathematics of logic circuits






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






26. A two terminal circuit containing voltage sources - current sources - and resistors can be modeled as a voltage source in series with a resistor






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






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






29. 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.






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






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






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






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






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






35. To connect 'end- to- end' as when several counters are connected from the terminal count output of one counter to the enable input of the next counter






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






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






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






39. The number of protons in a nucleus






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






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






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






43. A program that converts English- like mnemonics into machine code






44. 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.






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






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






47. Voltage Divider Rule in determining TEC Thevenin Equivalence Circuit






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






49. 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






50. Describes a number system with a base of ten