DOE-HDBK-1016/2-93ELECTRONIC DIAGRAMS, PRINTS, AND SCHEMATICSElectronic Diagrams and SchematicsPR-04Page 12Rev. 0Figure 12 Example BlocksBlockDrawingSymbologyNot all electronics prints are drawn to the level of detail depicting the individual resistors andcapacitors, nor is this level of information always necessary. These simpler drawings are calledblock diagrams. Block diagrams provide a means of representing any type of electronic circuitor system in a simple graphic format. Block diagrams are designed to present flow or functionalinformation about the circuit or system, not detailed component data. The symbols shown inFigure 12 are used in block diagrams.When block diagrams are used, the basic blocks shown above (Figure 12) can be used foralmost anything. Whatever the block represents will be written inside. Note that blockdiagrams are presented in this chapter with electronic schematics because block diagrams arecommonly found with complex schematic diagrams to help present or summarize their flow orfunctional information. The use of block diagrams is not restricted to electronic circuits. Blockdiagrams are used extensively to show complex instrument channels and other complex systemswhen only the flowpath of the signal is important.ExamplesofBlockDiagramsThe block diagram is the most basic and easiest to understand of all the types of engineeringprints. It consists of simple blocks that can represent as much, or as little, as desired. Anexample of a block diagram is shown in Figure 13.This particular block diagram represents an instrumentation channel used to measure theneutron flux, indicate the measured flux, and generate output signals for use by other systems.
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