What is a logic Circuit?
A Logic circuit uses two logic levels to transfer the information.
A hight logic level or “1” and
a low logic level or “0”
The Logic circuits are made of digital elements such as the AND gate, the OR gate, the NOT gate and a combinations of them
These combinations give way to other types of digital elements such as other gates, among others.
- the NAND gate
- the NOR gate
- the Exclusive OR gate
- Mutiplexors
- Demultiplexors
- Decoders
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- Encoders
- Memories
- Flip-flops
- Microprocessors
- Microcontrollers
- Etc. |
Modern digital electronics is used to perform many functions. While digital electronic circuits might seem very complex, actually they are built with a very large number of very simple circuits.
In Digital electronics the information is transmited between circuits in a binary form (zeros and ones).
The binary information is represented in the form of:
- "0" and "1",
- "Open" or "closed" (switch)
- "On" and "Off"
- "False" or "true", etc..
A logic circuit can be represented in many ways. In the following circuits the lamp can be turned on or off, depending on the switch position.
 
A truth table is a tabular listing of all possible states of the switches (inputs) that affect the circuit and their corresponding output values.
Related Links
- Logic Levels
- BCD code
- Analog and Digital. What´s the difference?
Truth table >>
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