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






2. An electrical device consisting of two conductive plates separated by an insulating material and possessing the property of capacitance.






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






4. 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






5. In a division operation the quantity that is being divided






6. In Boolean algebra - the OR operation






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






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






9. The time from the application of a valid memory address to the appearance of valid output data






10. 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






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






12. A receiving device on a bus






13. 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






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






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






16. The application of a dc voltage to an electronic device to produce a desired mode of operation






17. 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






18. 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.






19. A combined coder and decoder






20. 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.






21. A group of eight bits






22. An electrical instrument used to measure current






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






24. The unit of electrical current






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






26. A type of bistable multivibrator in which the output assumes the state of the D input on the triggering edge of a clock pulse.






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






28. The actual current in a branch






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






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






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






32. Basic input/output system; a set of programs in ROM that interfaces the I/) devices in a computer system






33. Voltage Divider Rule in determining TEC Thevenin Equivalence Circuit






34. Altera HDL; a nonstandard HDL






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






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






37. 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.






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






39. The mathematics of logic circuits






40. A relatively small - high- speed memory that stores the most recently used instructions or data from the larger but slower main memory






41. A code within DOS that allows various operations on files and includes a primitive assembler; to eliminate a problem in hardware or software.






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






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






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






45. Consisting of numerals - letters - and other characters






46. Characterized by ten states or values






47. The maximum value of a voltage or current






48. Describes a number system with a base of ten






49. In a PLD - a matrix formed by rows of product- term lines columns of input lines with a programmable cell at each junctions. In VHDL - an array is an ordered set of individual items called elements with a single identifier name.






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







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