Functional block diagram
A functional block diagram in systems engineering and software engineering is a block diagram, that describes a function between input variables and output variables.[1] A function is described as a set of elementary blocks. Input and output variables are connected to blocks by connection lines. An output of a block may also be connected to an input of another block:
Inputs and outputs of the blocks are wired together with connection lines, or links.[2] Single lines may be used to connect two logical points of the diagram:
- An input variable and an input of a block
- An output of a block and an input of another block
- An output of a block and an output variable
The connection is oriented, meaning that the line carries associated data from the left end to the right end. The left and right ends of the connection line must be of the same type.
Multiple right connection, also called divergence can be used to broadcast information from its left end to each of its right ends. All ends of the connection must be of the same type.
See also
References
- ^ James Perozzo (1994) The complete guide to electronics troubleshooting, explains: "The emphasis of a functional block diagram is to show the important input and output elements of a block, and it commonly uses schematic symbols to show these relationships".(p. 72)
- ^ William H. Von Alven (1964) Reliability engineering states: "Functional block diagrams show functional sequences and signal paths, and items which are wired in parallel are drawn in parallel." (p. 286)