Electron Tube Circuit
An electron tube or vacuum tube is an electronic device consisting of a sealed glass or metal container with a vacuum or filled with ionized gas at low pressure, in which the electrons flow is emitted. The electron tube has two electrodes: cathode and anode or plate. The cathode is usually a metallic electrode and a source of a stream or a cloud of electrons, which it emits at the heating. One says that the cathode causes thermionic or electron emission. Then, the emitted electrons are attracted, accelerated by the positively charged anode, and form the current through the tube. In turn, the negatively charged cathode repels and slows the electrons. The higher the voltage is, the more electrons flow to the anode. At the same time, the low-energy electrons are repelled by the cloud of electrons and return to the cathode.
The movement of electrons is controlled by an electric field, a magnetic field, or both. The magnetic field is produced outside the tube by an electromagnet or a permanent magnet. The electric field is created by the application of a voltage between the electrodes in the tube. An electric field can change the path of the electron stream, speed, and the number of flowing electrons. While the magnetic field is used to control the movement of the electrons from one electrode to another.
The electron tubes are used in various electronic circuits to control the flow of electrons. They amplify a weak current, generate oscillating radio-frequency (RF) power for radio and radar, convert an alternating current (AC) to direct current (DC), create images on a television screen or computer monitor. For a long time, vacuum tubes were used in a variety of electronic devices with low power and low frequency, in radios, high-fidelity sound systems, computers, transmitters, and so on. Currently, they are used in magnetrons, klystrons, gyrotrons, photoelectric cells, neon and fluorescent lamps, gas tubes used to produce luminous discharges, and X-ray tubes, which maintain a high voltage between the cathode and the anode. The cathode-ray tubes are also electron tubes producing electron beams to strike a screen in order to produce pictures in oscilloscopes or television displays.
Example 1. Electron Tube Circuit
Since the invention of solid-state devices called transistors, electron tubes have been rarely used. They are still used only on high power levels and frequencies, in high-power transmitters, high-end audio equipment, radars, X-ray machines, microwave ovens, and some oscilloscopes. In addition, currently, the power and efficiency of the electron tubes are improved due to modern innovations, using superior materials like diamond, pyrolitic graphite, rare-earth magnets, etc. The transistors are the semiconductor equivalent to the electron tubes at low power levels. They perform much the similar functions as tubes, control the flow of electrons in a circuit through another flow of electrons or a voltage.
Example 2. Edison Effect
Striving to find an effective software to design the Electron tube circuit, turn attention to ConceptDraw DIAGRAM software extended with the unique Electron Tube Circuits solution. It offers useful drawing tools, illustrative samples, and a collection of libraries with vector design elements — vacuum tubes, electron tubes, gas-filled tubes, diodes, sockets, and many more to create electrical circuits without any effort.
Example 3. Electron Tube Circuits Solution in ConceptDraw STORE
The Electron Tube Circuits samples you see on this page were created in ConceptDraw DIAGRAM software using the drawing tools of the Electron Tube Circuits Solution. These examples successfully demonstrate the solution's capabilities and professional results you can achieve using it. An experienced user spent 5-10 minutes creating each of these samples.
Use the drawing tools of the Electron Tube Circuits solution to design your own Electron Tube Circuits Infographics quick, easy, and effective.
All source documents are vector graphic documents. They are available for reviewing, modifying, or converting to a variety of formats (PDF file, MS PowerPoint, MS Visio, and many other graphic formats) from the ConceptDraw STORE. The Electron Tube Circuits Solution is available for ConceptDraw DIAGRAM users.
TEN RELATED HOW TO's:
When trying to figure out the nature of the problems occurring within a project, there are many ways to develop such understanding. One of the most common ways to document processes for further improvement is to draw a process flowchart, which depicts the activities of the process arranged in sequential order — this is business process management. ConceptDraw DIAGRAM is business process mapping software with impressive range of productivity features for business process management and classic project management. This business process management software is helpful for many purposes from different payment processes, or manufacturing processes to chemical processes. Business process mapping flowcharts helps clarify the actual workflow of different people engaged in the same process. This samples were made with ConceptDraw DIAGRAM — business process mapping software for flowcharting and used as classic visio alternative because its briefly named "visio for mac" and for windows, this sort of software named the business process management tools.
This flowchart diagram shows a process flow of project management. The diagram that is presented here depicts the project life cycle that is basic for the most of project management methods. Breaking a project into phases allows to track it in the proper manner. Through separation on phases, the total workflow of a project is divided into some foreseeable components, thus making it easier to follow the project status. A project life cycle commonly includes: initiation, definition, design, development and implementation phases. Distinguished method to show parallel and interdependent processes, as well as project life cycle relationships. A flowchart diagram is often used as visual guide to project. For instance, it used by marketing project management software for visualizing stages of marketing activities or as project management workflow tools. Created with ConceptDraw DIAGRAM — business process mapping software which is flowcharting visio alternative or shortly its visio for mac, this sort of software platform often named the business process management tools.
Picture: Process Flowchart: A Step-by-Step Comprehensive Guide
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ConceptDraw DIAGRAM is the best flowchart software that suits the following key factors: ✔️ ease of use, ✔️ functions, ✔️ easy-to-use tools, ✔️ pre-made elements and templates, ✔️ customization, ✔️ collaboration, ✔️ compatibility, ✔️ support, ✔️ updates, ✔️ cost
Picture: Flowchart Software: A Step-by-Step Guide
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A database is a data collection, structured into some conceptual model. Two most common approaches of developing data models are UML diagrams and ER-model diagrams. There are several notations of entity-relationship diagram symbols and their meaning is slightly different. Crow’s Foot notation is quite descriptive and easy to understand, meanwhile, the Chen notation is great for conceptual modeling.
An entity relationship diagrams look very simple to a flowcharts. The main difference is the symbols provided by specific ERD notations. There are several models applied in entity-relationship diagrams: conceptual, logical and physical. Creating an entity relationship diagram requires using a specific notation. There are five main components of common ERD notations: Entities, Actions, Attributes, Cardinality and Connections. The two of notations most widely used for creating ERD are Chen notation and Crow foot notation. By the way, the Crow foot notation originates from the Chen notation - it is an adapted version of the Chen notation.
Picture: ERD Symbols and Meanings
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ConceptDraw DIAGRAM - workflow software extended with the Workflow Diagram solution provides a complete set of samples, templates and features help you to draw diagrams faster. A workflow software you use for drawing workflow diagrams and business process flow diagrams should provide a wide set of examples allows you get closer with workflow diagrams, learn symbols meaning, find appropriate layout and design, and then start drawing your own workflow diagram masterfully. Workflow diagrams used for orchestrating organizational processes between company departments and humans, so critical process diagrams used to train many people to interact must be clear and professional to convey an idea from a view. Thats a reason we created a lot workflow symbols and workflow icons collected them into special Workflow Diagram solution in ConceptDraw Solution Park.
Picture: Workflow Diagram Examples
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If you are just a beginner in drawing flowcharts, it may seem that a sheet of paper and a pen are just enough. However, at the time you would want to share your results, diagramming applications would suite you better. it’s very easy to create diagrams that way and to discover new kinds of flowcharts.
The huge collection of sample ConceptDraw diagrams, charts, illustrations and other types of business drawings includes a wide range of business themes. A huge number of graphic images of ConceptDraw documents is divides on business application areas according to business-oriented solutions for which they were made.Here is a short visual list of samples of flowcharts, process diagrams, UML models, management charts, computer network diagrams, maps, infographics, illustrations, etc. In short, each ConceptDraw solution is accompanied with at least ten samples representing some particular examples of the application of the given chart.
Picture: Applications
When thinking about data visualization, one of the first tools that comes to mind is a flowchart design. You can find flowchart symbols, shapes, stencils and icons easily on the Internet, but it might take time to systematize this information. Nevertheless, once you start flowcharting, you’ll love its simplicity and efficiency.
This diagram consists from standard flowchart symbols, approved by ANSI (American National Standard Institute) for drawing flowcharts. A flowchart is a diagram that represents a step-by-step algorithm of any process, displaying the process stages as boxes that are connected with arrows. Flowchart design makes it clear and readable.
Flowchart designed using ConceptDraw DIAGRAM flowchart software allows to make attractive and clear process presentation, it makes interpretation of the business process flow fresh and versatile. Great flowchart design view is a big advantage over the diagram created manually on a paper.
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Flowchart Design
Flowchart Symbols, Shapes, Stencils and Icons
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It can be tough to get straight into business papers and processes.Otherwise, you can learn how to create flowcharts for an accounting information system and visualize these documents. Accounting diagrams are clear and easy to understand for all the participants of the process.
There are symbols used for creating accounting flowcharts using ConceptDraw DIAGRAM and its Accounting Flowcharts solution. Accounting flow charts are a special kind of flow charts. Actually a variety of flowcharts are often used to facilitate many aspects of a workflow of accounting department. Accounting flowcharts are utilized to support creating accounting documentation, to depict positions responsible for fulfillment of each phase of accounting workflow.
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How to Create Flowcharts for an
Accounting Information System
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A flowchart is a powerful tool for examining processes. It helps improving processes a lot, as it becomes much easier to communicate between involved people, to identify potential problems and to optimize workflow. There are flowcharts of different shapes, sizes and types of flowchart vary from quite basic process flowcharts to complex program flowcharts. Nevertheless, all these diagrams use the same set of special symbols like arrows to connect blocks, parallelogram to show data receiving or rectangles for showing process steps.
Basic flowcharts are used to represent a simple process algorithm. A basic flowchart notation consists of rectangles (business processes), arrows (the flow of information, documents, etc.). The same notation is used in items such as the "decision", which allow you to do the branching. To indicate the start of the entire business process and its termination can be used the "Terminator" element. The advantages of Basic Flowchart are simplicity and clarity. With it you can quickly describe the business process steps. Creating of Basic Flowchart does not require any special knowledge, as easily understand by employees with different levels of education and IQ.
Picture: Types of Flowchart: Comprehensive Overview
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There are many ways to track the system in a critical situation. To model a system behavior, uml notation is widely used. Usually, an UML diagram consists of elements such as actor and a case.
This diagram represents the structure of UML notations. Unified Modeling Language (UML) is used in software engineering to depict graphically the software modeling process. UM Language uses graphic notations for developing models of object-oriented systems. These notations displays requirements, sub-systems, logical and physical elements, etc. We created this diagram using ConceptDraw DIAGRAM reinforced with Rapid UML solution. It can be helpful for students on software engineering, when learning UML.
Picture: UML Notation
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Local area network connects computers and other network appliances within an area, such as office building or a campus. It can be difficult to provide such network without a predesigned plan. For these purposes you can use network diagram software, which helps you to create LAN network diagrams and office network diagrams quickly and effortless. This will speed up your work and you can save the diagram for the future network improvements.
The following diagram illustrates a network topology of the small office. LAN configuration has a star topology. The local network joins 8 computers among which are several desktop PCs, laptop, two iMacs and iBook. The end-point devices are divided into three groups. Each group is connected to its hub. There is a network printer and a modem, which are interconnected with other devices through a network server. Each computer on the LAN can access the server through a corresponding hub.
Picture: Network Diagram Software. LAN Network Diagrams. Physical Office Network Diagrams
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