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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. A semiconductor device that conducts current in only one direction






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






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






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






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






7. Burst extended data output dynamic random- access memory






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






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






10. Altera HDL; a nonstandard HDL






11. 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






12. 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.






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






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






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






16. The maximum value of a voltage or current






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






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






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






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






21. A logic circuit used to add two binary numbers






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






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






24. A bridge circuit that is in the balanced state as indicated by 0 V across the output.






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






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






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






28. 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






29. 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






30. The actual current in a branch






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






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






33. A circuit with a complete current path






34. The number of protons in a nucleus






35. Consisting of numerals - letters - and other characters






36. A theorem that states that any amount of voltage sources and current sources can be combined into a single current source with a parallel resistor.

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






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






39. 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






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






41. The mathematics of logic circuits






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






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






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






45. 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






46. Describes a number system with a base of ten






47. A combined coder and decoder






48. American National Standards Institute






49. To connect 'end- to- end' as when several counters are connected from the terminal count output of one counter to the enable input of the next counter






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