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






2. A type of IC package whose leads must pass through holes to the other side of a PC board






3. 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






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






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






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






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






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






9. In addition - the number that is added to another number called the augend






10. American wire gauge; a standardization based on wire diameter






11. Arithmetic Logic Unit; the key processing element of a microprocessor that perfoms arithmetic and logic operations.






12. 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






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






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






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






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






17. 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






18. 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.






19. Information in numeric - alphabetic - or other form.






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






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






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






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






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






25. 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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26. 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






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






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






29. A connection at the midpoint of a winding in a transformer






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






31. In Boolean algebra - the AND operation






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






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






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






36. The mathematics of logic circuits






37. 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.






38. Having two opposites charge carriers within the transistor structure






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






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






41. A digital counter having ten states






42. Describes a number system with a base of ten






43. The phasor combination of resistive power (true power) and reactive power. The unit is the volt- amperes (VA).






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






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






46. An electrical instrument used to measure current






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

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48. Characterized by ten states or values






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






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