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Digital Fundamentals

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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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 process of producing an output carry in full- adder when both input bits are 1s.






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






3. 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.






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






5. 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






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






7. A combined coder and decoder






8. 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






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






10. 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






11. The law that states ORing several variables and then ANDing the single variable with each of the several variables and the ORing the product






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






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






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






15. Sum of all currents entering a node is equal to the sum of all currents leaving the same node

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






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






18. 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.






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






20. A digital circuit capable of counting electronic events - such as pulses - by progressing through a sequence of binary states.






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






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






23. A set of interconnections that interface one or more devices based on a standardized specification






24. 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.






25. A type of magnetic tape format






26. A circuit that selects data from several inputs one at a time in a sequence and places them on the output; also called a multiplexer.






27. Consisting of numerals - letters - and other characters






28. 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






29. 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






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






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






32. Burst extended data output dynamic random- access memory






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






34. In Boolean algebra - the OR operation






35. 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






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






37. A logic circuit used to add two binary numbers






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






39. Data Communications equipment






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






41. 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.






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






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






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






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






46. A group of eight bits






47. 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






48. The total number of data units(bits - nibbles - bytes - words) that a memory can store.






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






50. Dynamic random- access memory; a type of semiconductor memory that uses capacitors as the storage elements and is a volatile - read/write memory







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