触发器

By studying the internal structure and working principle of 555 timer, this paper introduces three typical circuits----Schmitt trigger, Bistable multivibrator and Astable multivibrator----which are composed by 555 timer. Furthermore, it explores the various applications of 555 timer in circuit designing through the expansion of the circuits and eventually same experience and methods offers in circuit designing by using 555 timer.

本文通过研究555定时器的内部结构和工作原理，介绍了其组成的施密特触发器，单稳态触发器和多谐振荡器等三个典型电路，并通过这些电路的扩展，探讨了555定时器在电路设计中的各种应用，由此得出用555定时器设计电路的经验和方法。

This paper analyzed and researched the characteristics of Schmitt trigger, single-stable-state trigger and astable multivibrator constituted by 555 timer based on PSPICE. Against the phenomenon of astable multivibrator constituted by 555 timer has no oscillation in PSPICE, an effective analysis method was brought out for 555 timer circuit to simulate the actual oscillator.

作者在文中应用PSPICE对555定时器构成的施密特触发器、单稳态触发器和多谐振荡器的工作特性进行了仿真分析和研究，针对PSPICE中555定时器构成的多谐振荡器不起振的问题提出了模拟振荡电路的有效起振方法，对电子电路的分析与设计具有一定的参考意义。

SN54LS596J is a monolithic, high-voltage, medium-current power logic 8-bit D-type latch, with eight positive edge-triggered D-type flip-flop, there is a direct clear-side, each flip-flop is the drain Open power DMOS transistor output, can provide 150mA continuous current, for the need for relatively high load power system design.

SN54LS596J是一种单片、高电压、中等电流的功率逻辑8位D型锁存器，具有8个正边沿触发的D型触发器，有一个直接清零端，每个触发器都是漏极开路功率DMOS晶体管输出，能提供150mA连续电流，专为用于需要相对高的负载功率的系统设计。

Through the elevator shaft DC transmission control system triggers the transformation of the traditional analog to digital trigger into digital trigger.

通过对矿井直流提升机传动控制系统中触发器的改造，将传统的模拟触发器改换成数字触发。

Through the elevator shaft DC transmissioncontrol system triggers the transformation of the traditionalanalog to digital trigger into digital trigger.

通过对矿井直流提升机传动控制系统中触发器的改造，将传统的模拟触发器改换成数字触发。

Based on D flip-flop and JK flip-flop to realize the digital filter function, simple structure and obvious effect.

详细说明：基于D触发器和JK触发器，实现了数字滤波器的功能，结构简单，效果明显。

The most commonly used trigger flip-flop is the master-slave type with cross feedback.

最常用的触发器是交叉反馈的主从触发器。

The function of integrated analog circuits realized with CPLD is discussed. Two methods of controlling the pulse width of monostable trigger are studied.

对用可编程逻辑器件技术实现模拟集成电路的功能进行了探讨，研究了实现单稳态触发器脉冲宽度控制的两种方法：用外接RC的单稳态触发器；用外部信号控制脉宽。

The function of integrated analog circuits realized with CPLD is discussed. Two methods of controlling the pulse width of monostable trigger are studied. One is realizing monostable trigger with external RC , the other is controlling the pulse width with external signal.

对用可编程逻辑器件技术实现模拟集成电路的功能进行了探讨，研究了实现单稳态触发器脉冲宽度控制的两种方法：用外接RC的单稳态触发器；用外部信号控制脉宽。

As required by the working features of monostable flip flops, the design idea of monostable flip flops with RC circuit as the timer unit is explained by using the transient phenomenon of signal changing resulted from the differential circuit or from "the static race hazard of signal", and by linking the storage principle of signal feedback.

根据单稳态触发器工作特点的要求，以RC电路为定时单元，利用微分电路及"信号静态竞争冒险"等信号瞬变现象，并结合信号反馈存贮的原理，阐明单稳态触发器的设计思想。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。