Logic Gates
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This document discusses different types of logic gates used in digital circuits. It defines binary numbers as having two digits - 0 and 1 - and explains that logic gates follow logical relationships between input and output voltages, having one or more inputs but only one output. Specifically, it describes the NOT gate or inverter as having one input and one output with the opposite state, the AND gate as having high output only when all inputs are high, and the OR gate as having high output when any input is high.
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Logic gates
Logic gates are electronic digital circuits that perform logic functions. The common logic gates are AND, OR, NOT, NAND, NOR, XOR, and XNOR. Each gate has a corresponding logic symbol and truth table. Logic gates can be combined to build more complex digital circuits like adders, subtractors, and parity checkers. Common logic gate integrated circuits include the 7400, 7402, 7404, 7408, and 7432 series, with each having a specific pin configuration. Logic gates are fundamental building blocks for digital electronics.
Logic Gates
Logic gates are elementary building blocks of digital circuits that have inputs and outputs representing binary digits 0 and 1. There are several basic types of logic gates including AND, OR, NOT, XOR, NAND, NOR, and XNOR gates. Each gate functions according to specific rules - for example, an AND gate only outputs 1 if all its inputs are 1, while a NAND gate produces the opposite output of an AND gate. Logic gates are used in various electronic devices and circuits.
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Logic Gates
Logic gates are elementary building blocks of digital circuits that have inputs and outputs representing binary digits 0 and 1. There are several basic types of logic gates including AND, OR, NOT, XOR, NAND, NOR, and XNOR gates. Each gate functions according to specific rules - for example, an AND gate only outputs 1 if all its inputs are 1, while a NAND gate produces the opposite output of an AND gate. Logic gates are used in various electronic devices and circuits.
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Logic Gates
- 2. DIGITAL CIRCUITS • A binary number has only 2 digits – 0 and 1. There can be a voltage corresponding to 0 (say 0V) and 1 (say 5V). In digital electronics only these two levels of voltages are used. Such signals are called Digital Signals. ~AN~ 2
- 3. LOGIC GATES • A Gate is a digital circuit that follows certain logical relationships between the input and output voltages. Thus, they are generally known as logic gates. • They consist of one or more input signals but only one output signal. ~AN~ 3
- 4. NOT GATE or INVERTERS • An Inverter is a gate with only 1 input signal and 1 output signal • The output state is always the opposite of the input state ~AN~ 4
- 5. NOT GATE • Logic Symbol • Boolean Expression Z = X’ ~AN~ 5
- 6. AND GATE • 2 or more input signals and 1 output signal • All inputs must be high to get a high output. ~AN~ 6
- 7. AND GATE • Boolean Expression Z = X .Y • Logic Symbol X Y Z If X is TRUE AND Y is TRUE then Z will be TRUE otherwise Z is FALSE. ~AN~ 7
- 8. OR GATE • 2 or more input signals and 1 output signal • If any input signal is high, the output signal is high. ~AN~ 8
- 9. OR GATE • Boolean Expression Z = X +Y • Logic Symbol X Y Z If X is TRUE OR Y is TRUE then Z will be TRUE otherwise Z is FALSE. ~AN~ 9