| 单词 | logic circuits |
| 释义 | logic circuits The basic switching circuits or gates used in digital computers and other digital electronic devices. The output signal, using a binary notation, is controlled by the logic circuit in accordance with the input system. The three basic logic circuits are the and , or , and not circuits. The and circuit gives a binary 1 output if a binary 1 is present on each input circuit; otherwise the output is a binary 0. The or circuit gives a binary 1 output if a binary 1 is present on at least one input circuit; otherwise the output is binary 0. The not circuit inverts the input signal, giving a binary 1 output for a binary 0 input or a 0 output for a 1 input. Often these basic logic circuits are used in combination, e.g. a nand circuit consists of not + and circuits. In terms of electronic equipment, logic circuits are now almost exclusively embodied into integrated circuits. They formerly made use of discrete transistors, although they were originally based on thermionic valves |
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