1. Digital systems are said to be constructed by using logic gates. These gates are the AND, OR, _____, NAND, NOR, EXOR and EXNOR gates.
2. Logic gates are primarily implemented using diodes or transistors acting as electronic switches, but can also be constructed using vacuum tubes, electromagnetic relays (relay logic), fluidic logic, pneumatic logic, optics, molecules, or even mechanical el
3. Read the following excerpt and see if you can fill in the blanks.
4. This excerpt explains how it all fits together. Fill in the blanks and be sure to read it all!
Excerpt that explains how it all fits together
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When you string a bunch of these transistors together, then you
get what’s called a ____________, which lets you add, subtract,
multiply, and divide binary numbers in any way imaginable.
In a physical circuit,
these logic gates have:
Inputs.
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All logic gates require some kind of input value so that they
have numbers to compare. These figures come in the form of voltages. When
your input voltage is 0V, then it’s considered to be low, or 0. And when
you have a voltage of 5V as an input, then this is deemed to be high, or 1.
Outputs.
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Once a logic gate has a chance to process your input, it can then
make a decision on whether to open its gate or keep it closed. This output is
entirely determined by the type of logic gate you’re using, and some will only
open if you have two high voltages as an input, whereas others will only open
if you have a low voltage but not a high voltage as an input.
Mega transistor
CPU
Logic Gate
And Gate
5. Modern day ______________________are mathematical powerhouses, stringing together a dizzying amount of logic gates with the help of transistors to perform calculations and process data
6. An 'AND' gate requires two inputs of a '1' in order to get an output of a '1'. An example of this in plain english is:
7. Look at the image below and see if you can fill in the "?". What is the output?
8. In the following image we have an AND gate with two _____ A and B, and one _________
9. An '____' gate as shown in the image is requires either input A or B to be a 1 for the output to be 1.
10. A NOT gate, as shown, inverts signals. So if the input A is 1, the output would be:
11. Most amazing laptops today have solid state drives. The magic gate behind SSDs is the ________
13. What 'gates' does the following circuit diagram include?
14. What 'gates' does the following circuit diagram include?
15. If the input is 0 and it goes through a NOT gate, the output would also be 0
16. To get an output of 1 using an AND gate, it would be necessary to have a 1 and a 1 (two ones)
17. An OR gate would produce an output of 1 if the input is 0 and 0.
18. It is the OR gate that is shaped like a triangle.
19. How can you add, subtract, multiply, and divide using nothing but electric currents?
20. This logical way of comparing numbers to make decisions that produce either a yes or no, 1 or 0, true or false is called Boolean algebra after its discoverer, English mathematician George Boole (1815 - 1864)