我们所有组合逻辑芯片都是基于Nand实现的,下面是Nand的真值表:只有当两个输入都为1时输出为0,其余输出为1反,然后输出。 首先我们用Nand实现一个Not。Not很简单,对其输入取反,然后输出。下面是我自己的实现方式: HDL实现:硬件描述语言实现。 /** * Not HDL实现 * Not gate: * out = not in */ CHIP Not...
However, note that the connection is occasionally broken by an XOR gate 2220, which combines the propagating logic state with an input from the feedforward line B or the feedback line A. These flip-flops have slightly larger output drivers than normal, in order to drive the decoding logic....
required number of inputs may be utilized to produce a gate having a desired number of inputs. For example, a two-input NAND gate may be created from a three-input NAND gate by tying an input of the three-input NAND gate to another input of the three-input NAND gate. In a typical...