Digital system: entity can process, transfer and store any kind of digital signals is Composed of individual digital logic circuits which are designed to perform specified function

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

INTRODUCTION Level five Complex Systems, Function Units from levels Two through Four Level four More complex Function Logic Units, e.g. microprocessor Third IC level (VLSI) Level three Function Logic Units, e.g. adders, Second IC level counters, multiplexers (MSI and LSI) Level two Function Logic Units, e.g. gates, NOT, AND, NAND, EX-OR First IC level (SSI)

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

FLIP-FLOPS Add the certain combinational logic circuit to the input of the original flip- flop New

1.2基本典型信号 1、指数信号和正弦信号 2、奇异信号 3、斜变信号 4、单位阶跃信号和符号函数 5、单位冲激和冲激偶信号 6、正交信号

• 一般周期信号的傅立叶变换 • 傅立叶级数FS与其单脉冲的傅立叶 变换FT的关系 • 正余弦信号的傅立叶变换FT • 周期单位冲激序列的FS和 FT • 周期矩形脉冲的FS和FT • 周期矩形脉冲与单矩形脉冲的关系

•拉氏变换的定义——从傅立叶变换到拉氏变换 •拉氏变换的性质，收敛域 •卷积定理(S域) •周期和抽样信号的拉氏变换 •系统函数和单位冲激响应 •拉氏变换与傅氏变换的关系

•周期矩形脉冲信号 •周期锯齿脉冲信号 •周期三角脉冲信号 •周期半波脉冲信号 •周期全波脉冲信号

3-4典型非周期信号的频谱 1、单边指数信号 2、双边指数信号 3、矩形脉冲信号 4、符号函数 5、冲激函数信号 6、冲激偶函数信号 7、阶跃函数信号