查询词典 oscillatory circuit

Their flash frequency is fixed so their use is limited and you may prefer to build your own circuit to flash an ordinary LED, for example our Flashing LED project which uses a 555 astable circuit.

他们的闪光频率是固定的，使它们的使用是有限的，你可能更愿意建立自己的电路，以一个普通的LED闪光灯，例如我们闪光的LED 项目，该项目使用了555稳态电路。

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。

Timer is a kind of multipurpose numeral- imitate the hybrid integrated circuit, in addition to constituting single multivibrator, astable multivibrator, Schmitt trigger , can also connect many useful electric circuit, all got the application in the creation and varieties of a wave form, measure and control, home appliances, the electronics toy wait many realms.

555定时器是一种多用途的数字-模拟混合集成电路，除了可以组成单谐振荡器、多谐振荡器、施密特触发器以外，还可以接成许多种有用电路，在波形的产生与变化、测量与控制、家用电器、电子玩具等许多领域中都得到了应用。

Therefore, asynchronous circuit design is very important in the field of digital circuit design.

因此，异步电路设计在数字电路设计中的重要性不言而喻。

This design main content is as the core designs an atomizer take AT89C2051 the control circuit and the atomization has the electric circuit.

本设计主要内容是以AT89C2051为核心设计出一个雾化器的控制电路及雾化发生电路。

The process of digital signal include routine filter circuit and Automatic Gain Control Circuit.

系统中对数据信号的处理，除了常规的滤波电路外，还采用了自动增益放大电路，来提高信号的可靠性。

Provided with an infrared automatic positioning protective circuit and an automatic reset circuit, the utility model realizes automatic positioning protection and compressor automatic control.

以放置给予保护的线路和一个自动的重新设定线路的一个红外线的自动机械提供，实效模型了解自动机械当放置保护和压缩物自动的控制。

Provided with an infrared automatic positioning protective circuit and an automatic reset circuit, the utility model realizes the automatic positioning protection of the sliding rack of the fluorescent screen and the automatic control of the compressor.

提供红外线自动定位保护电路和自动复位电路，公用运算模式，实现了自动定位保护滑动机架的荧光幕和自动化控制压缩机。

In this paper the reason of rapid increase of single phase short circuit current in 500 kV substation is analyzed. Through the calculation it is proved that neutral grounding by small reactance is an effective measure to reduce the single phase short circuit current, and the calculation method of the zero\|sequence reactance after autotransformer neutral grounding by small reactance being applied is expounded.

文中研究了500kV变电站单相短路电流急剧增长的原因，计算了变压器中性点经小电抗接地对限制单相短路电流的作用，论证了经小电抗接地是限制单相短路电流的有效措施之一，并阐述了500kV自耦变压器中性点经小电抗接地后，其等值零序电抗的计算方法，可供工程参考。

3 The operation of an auxiliary control device in an automatic toaster shall disconnect the element or elements that it controls from all conductors of the supply circuit in a cord-connected toaster and from all ungrounded conductors of the supply circuit for a permanently connected toaster if live parts are accessible to the extent that they are subject to unintentional contact when the appliance appears to be in a de-energized condition.

24.3当电器处于未曾加强的条件下，若活动件易于碰到无意识接触的区域，在自动多士炉中的辅助控制装置应断开其控制的发热组件，或线连接多士炉的所有电源导体，或永久性连接多士炉的所有非接地导体。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。