Karnaugh maps It is a matrix of squares. each square represent a minterm or maxterm from a Boolean equaTion N-variable karnaugh map have 2 squares The binary numeral on the sides of k-map is the variable coordinates

15,1半导体的导电特性 15.2PN结 15,3半导体二极管 15.4稳压管 15,5半导体三极管

12.1可编程控制器的结构和工作原理 12.2可编程控制器的程序编制 12.3可编程控制器应用举例

Let be the set of all input variables, X={, X1, .Xn} Let y be the set of all output variables, y={Y, 1 ...m} o The combinational function, F, operated on the input variable set, to produce the output variable set y. o The output is related to the input as

2.1MCS-51单片机的内部结构 2.2PU的结构 2.3MCS-51单片机存储器 2.4时钟电路及时序 2.5输入/输出端口 2.6MCS-51单片机的引脚功能 2.7MCS-51单片机的工作方式

7.1 接口电路概述 7.2 8253定时计数控制器 7.3 并行接口和可编程并行接口芯片8255A

第1.1节光的电磁理论 一、光是某一波段的电磁波 1.在真空中电磁波的传播速度: 1 C Eo从o

第8章并行接口与应用 8.1并行接口的基本概念 8.2可编程并行接口芯片8255A 8.3可编程并行接口芯片8155 8.4单片机与键盘和数码管显示器的接口电路

Synchronous sequential circuit memory, usually consisting of flip-flops, update circuit states information All flip-flops share a common clock pulse input The clock input is not a binary value representing the time of day but rather a\synchronous\train of pulses. Synchronous memory changes its data only at certain time intervals The flip-flops can change state only on a clock pulse edge

信噪比：衡量一个信号质量优劣的指标。它是在指定频带内，同一端口信号功率