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Electrical Symbols — Analog and Digital Logic

Digital electronics or digital (electronic) circuits are electronics that handle digital signals – discrete bands of analog levels – rather than by continuous ranges (as used in analogue electronics). All levels within a band of values represent the same numeric value. Because of this discretization, relatively small changes to the analog signal levels due to manufacturing tolerance, signal attenuation or parasitic noise do not leave the discrete envelope, and as a result are ignored by signal state sensing circuitry.

Electrical Symbols - Analog and Digital Logic

Pic. 1. Analog and digital logic Library

ConceptDraw DIAGRAM is a powerful software for creating professional looking electrical diagram quick and easy. For this purpose you can use the Electrical Engineering solution from the "Engineering" area of ConceptDraw Solution Park.

Electrical Engineering Solution for ConceptDraw DIAGRAM provides the stencils libraries of ready-to-use predesigned 926 vector symbols, templates and samples that make your electrical drawing quick, easy and effective.

26 libraries of the Electrical Engineering Solution of ConceptDraw DIAGRAM make your electrical diagramming simple, efficient, and effective. You can simply and quickly drop the ready-to-use objects from libraries into your document to create the electrical diagram.

Electrical Symbols

Pic. 2. Electrical Engineering symbols

Electrical diagram software will assist you in drawing your electrical diagrams with minimal effort and makes it very easy for beginners. Electrical symbols and smart connectors help present your electrical drawings, electrical schematic, wiring diagrams and blue prints.

Electrical Symbols — Analog and Digital Logic *

Pic. 3. Electrical Symbols - Analog and Digital Logic

Most of the electrical symbols can be changed in their appearance, styles and colors according to users' requirements. Electrical symbols are used to represent various electrical and electronic devices in a schematic diagram of an electrical or electronic circuit.

The following table lists some analog and digital logic electrical symbols in our electrical diagram software.

Symbol Meaning
Electrical Symbols — Analog and Digital Logic
Inverter 2Inverter 2
Buffer 2Buffer 2
Function generatorFunction generator
Logic gates 1Logic gates 1
RS Flip-flopRS Flip-flop
JK Flip-flopJK Flip-flop
Latch Flip-flopLatch Flip-flop
D Flip-flopD Flip-flop
Analog symbolAnalog symbol
Digital symbolDigital symbol
Negative logic dotNegative logic dot
Potentiometer 2Potentiometer 2
Positional servoPositional servo
Piezoelectric crystal, 2 electrodesPiezoelectric crystal, 2 electrodes
Piezoelectric crystal, 3 electrodesPiezoelectric crystal, 3 electrodes
Piezoelectric crystal, 4 electrodesPiezoelectric crystal, 4 electrodes
I/O port unidirectionalI/O port unidirectional
I/O port bidirectionalI/O port bidirectional
Square signalSquare signal
Sine wave signalSine wave signal
Sawtooth signalSawtooth signal
Ramp signalRamp signal
3 state data signal3 state data signal
Three-state bufferThree-state buffer
Summing amplifierSumming amplifier
Function generator 2Function generator 2
Generalized integratorGeneralized integrator
Operational amplifierOperational amplifier
Operational amplifier 2Operational amplifier 2
Switch pointSwitch point
Switch point 2Switch point 2

Digital electronic circuits are usually made from large assemblies of logic gates, simple electronic representations of Boolean logic functions.

How to Create an Electrical Diagram Using Analog and Digital Logic Library

  • Open ConceptDraw DIAGRAM new document page.
  • Select libraries from Electrical Engineering section.

    Libraries from Electrical Engineering section

  • There are a few different ways to place an object into your drawing:

    • Click on an object and then click on the document, at the place you want the object to be inserted.
    • Perform a drag-and-drop from the library to your document.
    • Double click on an object’s icon in the library to place an object in the center of your document.
  • Select the Smart Connector tool Smart Connector. To connect elements using this tool, drag the connector from one connect dot to another.You can use Layers to place connections on different layers.
  • Result: Circuit Diagram.
    Electrical Diagram


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This template was created in ConceptDraw DIAGRAM diagramming and vector drawing software using the Block Diagrams Solution from the “Diagrams” area of ConceptDraw Solution Park. This template shows the Product Proposal Diagram on that is displayed the sequence of the product planning steps. This diagram is convenient, visual and clear.Product Proposal Template *
Picture: Product Proposal Template
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Electrical Symbols — Semiconductor →

Semiconductors are crystalline or amorphous solids with distinct electrical characteristics. They are of high resistance — higher than typical resistance materials, but still of much lower resistance than insulators. Their resistance decreases as their temperature increases, which is behavior opposite to that of a metal. Finally, their conducting properties may be altered in useful ways by the deliberate, controlled introduction of impurities into the crystal structure, which lowers its resistance but also permits the creation of semiconductor junctions between differently-doped regions of the extrinsic semiconductor crystal. The behavior of charge carriers which include electrons, ions and electron holes at these junctions is the basis of diodes, transistors and all modern electronics. 26 libraries of the Electrical Engineering Solution of ConceptDraw DIAGRAM make your electrical diagramming simple, efficient, and effective. You can simply and quickly drop the ready-to-use objects from libraries into your document to create the electrical diagram.Electrical Symbols — Semiconductor *
Picture: Electrical Symbols — Semiconductor
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Picture: Flowchart Software
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Picture: How To use Electrical and Telecom Plan Software
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Electrical Symbols — Electron Tubes →

Invented in 1904 by John Ambrose Fleming, vacuum tubes were a basic component for electronics throughout the first half of the twentieth century, which saw the diffusion of radio, television, radar, sound reinforcement, sound recording and reproduction, large telephone networks, analog and digital computers, and industrial process control. From the mid-1950s solid-state devices such as transistors gradually replaced tubes. However, there are still a few applications for which tubes are preferred to semiconductors; for example, the magnetron used in microwave ovens, and certain high-frequency amplifiers. 26 libraries of the Electrical Engineering Solution of ConceptDraw DIAGRAM make your electrical diagramming simple, efficient, and effective. You can simply and quickly drop the ready-to-use objects from libraries into your document to create the electrical diagram.Electrical Symbols — Electron Tubes *
Picture: Electrical Symbols — Electron Tubes
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