USTC/LogicGates
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==NOR Gate== | ==NOR Gate== | ||
[[Image:ustc_nor gate.jpg|thumb]] | [[Image:ustc_nor gate.jpg|thumb]] | ||
| + | [[Image:ustc_nor_truth table.jpg]] | ||
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| + | The NOR gate is a digital logic gate that implements logical NOR - it behaves according to the truth table to the right. A HIGH output (1) results if both the inputs to the gate are LOW (0). If one or both input is HIGH (1), a LOW output (0) results. | ||
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| + | p NOR q is only true when both p and q are false. | ||
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| + | The NOR operation is a logical operation on two logical values, typically the values of two propositions, that produces a value of true if and only if both operands are false. In other words, it produces a value of false if and only if at least one operand is true. | ||
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==NAND Gate== | ==NAND Gate== | ||
[[Image:ustc_nand gate.jpg|thumb]] | [[Image:ustc_nand gate.jpg|thumb]] | ||
| + | [[Image:ustc_nand_truth table.jpg]] | ||
| + | The NAND operation is a logical operation on two logical values, typically the values of two propositions, that produces a value of false if and only if both of its operands are true. In other words, it produces a value of true if and only if at least one of its operands is false. | ||
| + | A LOW output results only if both the inputs to the gate are HIGH. If one or both inputs are LOW, a HIGH output results. | ||
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==NOT Gate== | ==NOT Gate== | ||
[[Image:ustc_not gate.jpg|thumb]] | [[Image:ustc_not gate.jpg|thumb]] | ||
| + | [[Image:ustc_not_truth table.jpg]] | ||
| + | The NOT gate or inverter is a digital logic gate that implements logical negation. It behaves according to the truth table to the right. A HIGH output (1) results if the inputs is LOW (0). If the input is HIGH (1), a LOW output (0) results. | ||
| + | (cited from wikipedia.com) | ||
Revision as of 05:11, 2 August 2007
NOR Gate
The NOR gate is a digital logic gate that implements logical NOR - it behaves according to the truth table to the right. A HIGH output (1) results if both the inputs to the gate are LOW (0). If one or both input is HIGH (1), a LOW output (0) results.
p NOR q is only true when both p and q are false.
The NOR operation is a logical operation on two logical values, typically the values of two propositions, that produces a value of true if and only if both operands are false. In other words, it produces a value of false if and only if at least one operand is true.
NAND Gate
The NAND operation is a logical operation on two logical values, typically the values of two propositions, that produces a value of false if and only if both of its operands are true. In other words, it produces a value of true if and only if at least one of its operands is false.
A LOW output results only if both the inputs to the gate are HIGH. If one or both inputs are LOW, a HIGH output results.
NOT Gate
The NOT gate or inverter is a digital logic gate that implements logical negation. It behaves according to the truth table to the right. A HIGH output (1) results if the inputs is LOW (0). If the input is HIGH (1), a LOW output (0) results.
(cited from wikipedia.com)
