西安石油大学：《无机化学 Inorganic Chemistry》课程教学资源（实验指导）醋酸电离度和电离常数的测定

Binary Code Natural Binary Coded Decimal (BCD) Decimal BCD group of four binary digits represent 0000 a single decimal digit

Basie cCoucept Boolean algebra (Logic algebra) is closure mathematical system that defines a series of logic operation (and, or, not) performed on set k of variables (a, b,...) which can only have two values of 0 or 1

Analysis Analyze existing circuits to determine their function Synchronous sequential circuit The basic modeling structure Two circuit models: Mealy model& Moore model Three approach used to describe the circuit: Logic function equation

Sequential Circuit Models Yo Combinational logic Universal combinational circuit model No memory units No feedback from logic outputs back to the inputs

Registers, formed from collection of flip -flops, are used to store or manipulate data or both. Input and output function associated with registers include Parallel input/ Parallel output Serial input/ Serial output Parallel input/ Serial output OSerial input parallel output

第5章组合逻辑设计实践(二) 一、文档标准和电路定时 二、常用的中规模组合逻辑器件

第5章组合逻辑设计实践(一) 一、文档标准和电路定时 二、常用的中规模组合逻辑器件

simple counters Counting is a fundamental function of digital circuits. A digital counter consists of a collection of flip-flops that change states (set or reset) in a prescribed sequence

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