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






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






3. 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






4. Data Communications equipment






5. 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.






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






7. 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.






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






9. A method for internally testing a PLD based on the JTAG standard (IEEE std.)






10. In Boolean algebra - the AND operation






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






12. 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






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






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






15. An adverse condition that could occur if two or more devices try to communicate at the same time on a bus






16. An expression of variables and operators used to express the operation of a logic circuit






17. An application program in development software packages that controls the design flow process and translates source code into object code in a format that can be logically tested or downloaded to a target device






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






19. 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






20. 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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21. A circuit that prevents loading of an input or output






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






23. The mathematics of logic circuits






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






25. Sum of all the voltage drops in series equals to the source voltage

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






27. The unit of electrical current






28. 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






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






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






31. 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






32. An electrical instrument used to measure current






33. 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.






34. 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






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






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






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






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






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






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






41. 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.






42. 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






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






44. 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.






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






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






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






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






49. An energy source that uses a chemical reaction to convert chemical energy into electrical energy.






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