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






2. In Boolean algebra - the OR operation






3. 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






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






5. 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.






6. A type of magnetic tape format






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






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






10. 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






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






12. 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






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






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






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. Dual in - line memory module






17. A digital counter having ten states






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. Characterized by ten states or values






20. Having two directions. the stored data can be shifted right or left






21. Transistor-Transistor Logic and is implemented with bipolar junction transistors






22. The inverse of opposite of a number - in Boolean algebra - the inverse function - expressed with a bar over the variable. The complement of a 1 is a 0 - and vice versa






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






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






25. 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






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






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






28. Describes a number system with a base of ten






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






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






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






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






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






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






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






36. A circuit with a complete current path






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






38. Data Communications equipment






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






40. Having two opposites charge carriers within the transistor structure






41. Altera HDL; a nonstandard HDL






42. A receiving device on a bus






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






44. 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






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






46. The maximum value of a voltage or current






47. The mathematics of logic circuits






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






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






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






Can you answer 50 questions in 15 minutes?



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