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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 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.






2. 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






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






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






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






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






7. A type of magnetic tape format






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






9. A group of eight bits






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






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






12. American National Standards Institute






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






14. The beginning address of a segment of memory






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






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






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






18. 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.






19. 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






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






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






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






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






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






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






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






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






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






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






30. A theorem that states that any amount of voltage sources and current sources can be combined into a single current source with a parallel resistor.

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31. The smallest particle of an element possessing the unique characteristics of that element.






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






33. In Boolean algebra - the AND operation






34. Having two opposites charge carriers within the transistor structure






35. Consisting of numerals - letters - and other characters






36. The digit generated when the sum of two binary digits exceeds 1






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






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






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






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






42. A program that translates an assembly language program for one type of microprocessor to an assembly language for another type of microprocessor






43. 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.






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






46. Dual in - line memory module






47. Direct memory access; a method to directly interface a peripheral device to memory without using the CPU for control






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






49. A logic circuit used to add two binary numbers






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