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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. Altera HDL; a nonstandard HDL






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






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






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






5. An arrangement of electrical and/or electronic components interconnected in such a way as to perform a specified function






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






7. 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






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






9. 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.






10. The mathematics of logic circuits






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






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






13. One of the three regions in a bipolar junction transistor






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






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






16. A circuit with a complete current path






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






18. To decrease the binary state of a counter by one






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






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






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






22. A type of semiconductor memory having capacitive storage cells that lose stored data over a period of time and therefore must be refreshed.






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






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






25. Data Communications equipment






26. 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






27. 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.






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






29. Consisting of numerals - letters - and other characters






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






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






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






33. A group of eight bits






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






35. 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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36. 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.






37. 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






38. 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.






39. The unit of electrical current






40. Describes a number system with a base of ten






41. A type of counter in which each stage is clocked from the output of the preceding stage.






42. The interval of time occupied by a single bit in a sequence of bits; the period of the clock






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






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






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






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






47. 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.






48. 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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49. Digital audio tape; a type of magnetic tape format






50. 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.