Think of it this way; a circuit structure is any sort of diagram that illustrates the way the circuit operates where the principal objective is that the proper wiring of elements and their relationship to each other rather than physical place relative to each other or intending prototypes. Nonetheless, in some applications classifying diagrams can be challenging so choose this as general information. I've discovered this is especially true when working with much more complex circuits and electronic equipment. I'm going to work with a simpler but average industrial circuit since these circuit set ups are exactly the same, but nevertheless where you're able to see how each sort of diagram indicates the role of the circuit in their own ways.
Here is another schematic diagram showing precisely exactly the same circuit, components and connections and it looks different but they fall into precisely exactly the same category.
Less mess, right? I have enough info in every one these diagrams to know just what this circuit does and also where to search for problems. Hope that this helps. ( Note: do not confuse lecture or circuit diagrams together with wiring diagrams; wiring diagrams will usually demonstrate images of elements like the pictorial, and how the entire or part of a circuit is wired. The difference is that wiring diagrams usually place an emphasis on actual physical location of necessary components relative to each individual that essentially tell a layman Just What to do about the wiring. )
Here's a version of a schematic diagram. The primary intent of this diagram will be to demonstrate the logic (speaking to electrical management ) of a circuit board. This diagram is the one I mainly encounter in my line of work, and it is extremely successful for troubleshooting problems or learning the way the circuit functions. Some frequencies are so huge that many kinds of schematic diagrams have to be read in increments from book form (generally with coded numbers so that information can be simpler located ). Again, here's the identical specific circuit because the first two weeks, but considering it in ladder shape.
A schematic diagram refers to a particular kind of circuit diagram that uses standard electrical/electronic symbols rather than images to demonstrate the way the circuit (or part of it) functions. Below is a standard 3-wire motor controller circuit employing a normal momentary stop - start pushbutton station employing a schematic diagram. (Momentary this means the button/switch you activate will go back to its default location once you physically let go of it, typically by a spring which forces the button/switch to do this.)
Pictorial design diagrams, or graphic circuit diagrams are basically the exact same thing with the identical function, but they use pictures of elements within the circuit rather than symbols. Again, here's the identical exact circuit (virtually except a control transformer was inserted and they are using conductors L1 and L3 instead of L1 and L2.