Signals and Systems

5.4 DEFINITION OF BASIC ELEMENTS OF BLOCK DIAGRAM

• Block Diagram: The shorthand pictorial representation of the cause and effect relationship between the input and output of a physical system is known as block diagram. Figure 5.2 shows the representation of a block diagram

   

  

   

  Fig. 5.2 Block diagram

   

• Output: The value of input multiplied by the block gain is is known as output.

  From Fig. 5.2(b)

   

  C(s) = G(s) R(s)       (5.5)

   

• Summing Point: At summing point two or more signals can be added or subtracted.

  Fig. 5.3 shows a summing point.

   

   

  Fig. 5.3 Summing point

   

  In Fig. 5.3, X(s), Y(s), and Z(s) are the inputs while C(s) is the output. ...