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






2. 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






3. In Boolean algebra - the OR operation






4. 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.






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






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






7. 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.






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






9. Dual in - line memory module






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






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






12. The main part of a computer responsible for control and processing of data; the core of a DSP that processes the program instructions






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






14. 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.






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






16. In Boolean algebra - the AND operation






17. Direct memory access; a method to directly interface a peripheral device to memory without using the CPU for control






18. The maximum value of a voltage or current






19. Burst extended data output dynamic random- access memory






20. 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.






21. 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






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






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






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






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






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






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






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






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






31. The actual current in a branch






32. 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






33. Having two opposites charge carriers within the transistor structure






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






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






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






37. 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.






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






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






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






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






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






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






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






45. A notational system for logic symbols that specifies input and output relationships thus fully defining a given function






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






47. A semiconductor device that conducts current in only one direction






48. A combination of logic gates interconnected to produce a specified Boolean function with no storage or memory capability; sometimes called combinatorial logic






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






50. The normal level of a pulse waveform; the voltage level in the absence of a pulse.