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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. 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.






2. The maximum value of a voltage or current






3. A logic circuit used to add two binary numbers






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






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






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






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

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8. The unit of electrical current






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






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






11. A nominally continuous electrical signal that varies in amplitude or frequency in response to changes in sound - light - heat - position - or pressure.






12. 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.






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






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






15. A unit of the cross - sectional area of a wire.






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






17. 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.






18. The process of rippling an input carry to become the output carry in a full- adder when either or both of the input bits are 1's and the input carry is a 1






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






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

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21. American Standard Code for Information Interchange; the most widely used alphanumeric code.






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






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






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






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






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






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






28. 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.






29. A digital circuit that compares the magnitudes of two quantiities and produces an output indicating the relationship of the quantities






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






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






32. American National Standards Institute






33. Voltage Divider Rule in determining TEC Thevenin Equivalence Circuit






34. An electrical instrument used to measure current






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






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






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






38. Altera HDL; a nonstandard HDL






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






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






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






42. The portion of the CPU that interfaces with the system buses and fetches instructions - reads operands - and writes results.






43. A one- way group of conductors from the to a memory - or other external device - on which the address code is sent






44. An asynchronous input used to reset a flip- flop (make the Q output 0); to place a register or counter in the state in which it contains all 0's






45. 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






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






47. In Boolean algebra - the OR operation






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






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






50. 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