Logic Gate Circuit

Logic gate circuit

THEORY


2.1. CIRCUIT BASIC LOGIC GATES

2.1.1. Not Gate (Not Gate)
           "NOT gate or can also be called a commutator (inverter) has the function of reverse logic input voltage at its output. An inverter (inverting) is a gate with one input signal and one output signal which state keluaranya always opposite to the input state. Flips in this case is changed into its opposite. Because the voltage is logic there are only two conditions, namely high and low, or "1" and "0", then the reverse logic voltage means changing the "1" to "0" or otherwise change the zero to one. Symbol or symbols of the door NOT shown in the picture below.

2.1.2. GATES AND (AND GATE)
       
           AND gate (AND GATE) or can be called the AND gate, is a rangkaianlogika that has several entrances (input) and has only one way out (output). AND gate has two or more than two signal inputs but only one output signal. In the AND gate, to produce a high output signal then all input signals must be of high value.



2.1.3. GATES OR (OR GATE)

               Different from the OR gate NOT gate has only one input, this gate has at least two input lines. This means that input can be more than two, for example, four or eight. What is clear is all logic gates always have only one output.Gerbang OR will provide high output signal if one or all of the high-value input signal, so it can be said that the OR gate has only a low output signal when all input signals low value.



2.1.4. NAND gate
 
         NAND gate is a NOT-AND, or an AND function are reversible. In other words, the NAND gate will produce a low output signal when all of the input signal value.



2.1.5. NOR gate
 
        NOR gate is a NOT-OR, or an OR function that reversed so that it can be said that the NOR gate will produce a high output signal when all the signals masukanya low value.


2.1.6. X-OR gate

          X-OR gate will produce a low output signal when all input signals low value or high value all input or in other words that the X-OR will produce a low output signal if the input signal is all worth the same.


2.1.7. X-NOR gates

          X-NOR gate will produce a high output signal when all input signals of the same value (as opposed to X-OR gate).



EXAMPLES OF APPLICATION OF LOGIC GATES

Example 1: F = A + B.C

Figure 1: string of logic gates.




2.2. GATES COMBINATION CIRCUITS

            "All logic circuits can be classified into two types, namely the combination circuit (combinational circuit) and a series of sequential (sequential circuit). The difference in these two types of this series lies in the nature of outputs. Outputs a series combination at any time is determined only by the input given time. Sequential circuit output at all times, except when it is determined by the input, the output is also determined by the state as before, so also by the previous input. Thus, a series of sequential still remember the previous output and said that this circuit has a memory (memory). Ability to remember the sequential circuit is achieved by providing a time delay on the reverse path (feedback) from output to input. In the block diagram, these two types of logic circuit can be described as in Figure 1. "(Albert Paul Malvino, Ph.D.)



Figure 3. General Model Series Logic












Table Series Logic Gate
 THEORY


2.1. CIRCUIT BASIC LOGIC GATES

2.1.1. Not Gate (Not Gate)
           "NOT gate or can also be called a commutator (inverter) has the function of reverse logic input voltage at its output. An inverter (inverting) is a gate with one input signal and one output signal which state keluaranya always opposite to the input state. Flips in this case is changed into its opposite. Because the voltage is logic there are only two conditions, namely high and low, or "1" and "0", then the reverse logic voltage means changing the "1" to "0" or otherwise change the zero to one. Symbol or symbols of the door NOT shown in the picture below.

2.1.2. GATES AND (AND GATE)
       
           AND gate (AND GATE) or can be called the AND gate, is a rangkaianlogika that has several entrances (input) and has only one way out (output). AND gate has two or more than two signal inputs but only one output signal. In the AND gate, to produce a high output signal then all input signals must be of high value.



2.1.3. GATES OR (OR GATE)

               Different from the OR gate NOT gate has only one input, this gate has at least two input lines. This means that input can be more than two, for example, four or eight. What is clear is all logic gates always have only one output.Gerbang OR will provide high output signal if one or all of the high-value input signal, so it can be said that the OR gate has only a low output signal when all input signals low value.



2.1.4. NAND gate
 
         NAND gate is a NOT-AND, or an AND function are reversible. In other words, the NAND gate will produce a low output signal when all of the input signal value.



2.1.5. NOR gate
 
        NOR gate is a NOT-OR, or an OR function that reversed so that it can be said that the NOR gate will produce a high output signal when all the signals masukanya low value.


2.1.6. X-OR gate

          X-OR gate will produce a low output signal when all input signals low value or high value all input or in other words that the X-OR will produce a low output signal if the input signal is all worth the same.


2.1.7. X-NOR gates

          X-NOR gate will produce a high output signal when all input signals of the same value (as opposed to X-OR gate).



EXAMPLES OF APPLICATION OF LOGIC GATES

Example 1: F = A + B.C

Figure 1: string of logic gates.




2.2. GATES COMBINATION CIRCUITS

            "All logic circuits can be classified into two types, namely the combination circuit (combinational circuit) and a series of sequential (sequential circuit). The difference in these two types of this series lies in the nature of outputs. Outputs a series combination at any time is determined only by the input given time. Sequential circuit output at all times, except when it is determined by the input, the output is also determined by the state as before, so also by the previous input. Thus, a series of sequential still remember the previous output and said that this circuit has a memory (memory). Ability to remember the sequential circuit is achieved by providing a time delay on the reverse path (feedback) from output to input. In the block diagram, these two types of logic circuit can be described as in Figure 1. "(Albert Paul Malvino, Ph.D.)



Figure 3. General Model Series Logic












Table Series Logic Gate