8位二进制数字密码锁系统设计(赵俊峰)8位二进制数字密码锁系统设计(赵俊峰).doc

8位二进制数字密码锁系统设计 外文文献翻译（译成中文3000字左右）： 1.Digital Circuit Introduction Digital circuit definition: Completes with the digital signal to the digital quantity carries on the arithmetic operation and the logic operation electric circuit is called the digital circuit, or number system. Because it has the logic operation and the logical processing function, therefore calls then umeral logic circuit. Numeral logic circuit classification (according to function minute): 1st, combinatory logic electric circuit The abbreviation combination circuit, it becomes by the most basic logical gate electric circuit combination. The character is tic is: Output value only and then input value related, namely output only by then input value decision. The electric circuit has not remembered the function, the output condition changes along with the input condition change, is similar to the resistance electric circuit, like the accumulator, the decoder, the encoder, the data selector and so on all belong to this kind. 2nd, succession logic circuit The abbreviation sequence circuit, it is adds on the feed back logic return route by the most basic logical gate electric circuit (to output the electric circuit which input) or the component combination becomes, lies in the sequence circuit with the combination circuit essence difference to have the memory function. The sequence circuit characteristic is: The output not only was decided by then input value, moreover also the and circuit past condition concerned. It is similar to containing the stored energy part the inductance or the electric capacity electric circuit, like electric circuit and so on trigger, latch, counter, shift register, reservoir all is the sequence circuit typical component. Digital circuit characteristic: 1st, simultaneously has the arithmetic operation and the logic operation function The digital circuit is take the binary system logic algebra as mathematics foundation, the use binary numeral signal, both can carryon the arith