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






2. The average of a sine wave over one half- cycle. It is 0.637 times the peak value.






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






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






5. Consisting of numerals - letters - and other characters






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






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






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






9. 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






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






11. A group of eight bits






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






13. 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.






14. The smallest particle of an element possessing the unique characteristics of that element.






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






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






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






18. 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.






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






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






21. The ratio of pulse width to period expressed as a percentage






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






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






24. A logic circuit used to add two binary numbers






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






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






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






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






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






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






31. 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






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






33. 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






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

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35. 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






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






37. The location of a given storage cell or group of cells in a memory; a unique memory location containing on byte






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






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






40. 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.






41. A electrical property of matter that exist because of an excess or a deficiency of electrons. Can be either positive or negative






42. Having two stable states. Flip- flops and latches are bistable multivibrators.






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






45. 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.






46. Burst extended data output dynamic random- access memory






47. In Boolean algebra - the AND operation






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






49. The unit of electrical current






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