- A means of specifying the relationship between logic states and logic levels on a diagram drawn without the use of the polarity indicator symbol. On a diagram drawn in positive logic the 1-state everywhere corresponds with the more positive value of the quantity (usually voltage) used to represent the logic states in the hardware. With the negative logic convention the 1-state corresponds with the less positive value of the variable quantity. If the polarity indicator symbol is used, its absence or presence at every input and output of each symbol indicates the logic relationship in force at each point. (The presence of the symbol indicates that negative logic is in force at the designated point, its absence that positive logic applies.); 在不使用极性指示符符号所描绘的图表中表示逻辑状态和逻辑电平之间关系的一种方法。在用正逻辑 所绘的图中,状态1处处相当于用来表示硬件逻辑状态的量的偏高正值 (通常为电压)。在负逻辑约定中,状态1相当于变量的偏低正值。如果使用极性指示符符号, 则在每种符号的各个输入输出处极性符号的出现或消失将有效地指出每一点的逻辑关系。 (该符号的出现表明在指定点上适用负逻辑;反之,在指定点上适用正逻辑。)
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