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# Logic and logic gates Essay

1 identify using cases how number and alphanumeric data could be coded in a computer system M1 explain using examples just how data trips around the cpu D1 generate complex logic circuits made up of arrays of simple logic circuits P2 describe just how analogue data can be converted and stored in computer systems M2 create reasoning circuits applying simple logic gates and give truth desks and description as to their particular operation D2 compare and contrast two different cpus.

P3 convert numeric info between different number systems including suspended point. M3 create low-level programs which involve decision making and branching P4 perform manipulation of numeric data held in three different amount systems M4 describe the between astable and bistable flip-flops. P5 describe the key components of your computer architecture and exactly how they communicate P6 explain the features of a processor P7 describe the operation of logic gates using fact tables P8 create, doc and test low-level Programs BTEC National Unit being unfaithful Computer Buildings Assignment 2: Computer Pieces and Features Criterion protected P7, M2, M4, D1.

For these responsibilities you are required to develop a report using drawings or diagrams and appropriate specialized language. Make sure you use ideal headings and subheadings to recognize separate duties and requirements 1) Make use of logic diagrams, and real truth tables and narrative to spell out the procedure of the next logic entrance: [P7] 2) Use basic logic entrance (eg AND, OR, NOT) to produce a common sense circuit to: a) Present a security outlet which includes input from a movement-sensing PIR (passive infra red sensor) and a light sensor. During your stay on island is movements sensed, in fact it is dark, the security light must be lit. b) Describe the logic outlet for being able to access an electrical cupboard.

For protection reasons, a top voltage power maintenance cupboard can only end up being accessed in the event the power is off, a special key is inserted, plus the high tension line can be earthed. c) Describe the logic routine for a Half-Adder. Be sure to are the logic picture, Boolean algebra statement and truth desk for each and a description showing how each works.

You will also ought to provide keys to any characters used to represent inputs and outputs. [M2] 3) Identify the difference among astable and bistable flip-flops using ideal diagrams. [M4] 4) Build complex logic circuits via arrays of simple logic circuits to: a) Make use of Half-Adders and further logic gates to build a complete Adder b)build a common sense circuit which includes Full Adders to add with each other the material of two eight-bit signs up. The formula for doing exercises the number of possible outputs is usually 2n. In is the volume of inputs. At the. g. if there are a couple of inputs compared to the formula would be 22.

The answer then is 4. Therefore there are four possible outputs. Truth Stand Input Result A. AND GATE In AND entrance the output can only be one particular if each of the inputs are all 1 and if either in the output are 0 as well as the other suggestions is 1 than output will always be zero. The two inputs AB and output Q represent the expression which in impact is right as the stands for AND.

Truth Stand Input Output ABC Z . 0gate can easily have more than 2 advices. The above NAND gate provides 3 advices. Therefore the method to work out the number of output is 23 sama dengan 8. The reality table can be on the side. Even though the formula to see the number of results for the fact table is a same, the actual gate is completely opposite because if the can easily be zero if most inputs will be 1 . The outcome will always be you if the inputs are mixture of 0 and 1 . The input appearance for this door is. The queue above stands for NOT.

The circle for the symbol is known as a bubble and is generally used to show the upside down (active-low) suggestions or result. The output can only be 1 is all the 2 inputs will be 0 of course, if the output can be 0 which means that the two inputs will be 1 and 0 or 0 and 1 . The expression for this door is. Which means that Q Door also find out as a great Inverter, almost always there is 1 insight.

If the input is you than end result is 0 and if the outcome is 1 than result has to be 0. The rational expression is definitely which means This form of gate is usually implemented in computers to get binary addition. If the inputs are 0 compared to the output can also be 0 of course, if both the inputs are one particular than the end result will also be zero. XOR is actually short pertaining to exclusive OR.

The rational expression for the XOR gate is definitely which means that This type of gate is simply the inverse of XOR (exclusive OR). You may only obtain a result of 1 is the two inputs work the same way either 00 or 14. If the advices are different elizabeth. g. zero and you or 1 and zero than the output will be 0. The expression with this type of gateway is.

North Warwickshire & Hinckley School.

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