Final answer:
An encoder with 10 input lines simplifies 10 individual signals into a 4-bit binary code through combinational logic. Known as a 10-to-4 line encoder, it performs encoding operation and provides a compact representation of the active input line.
Step-by-step explanation:
Block Diagram of a 10-Input Line Encoder
An encoder is a digital circuit that converts an active input signal into a coded output signal. With 10 input lines, a common type of encoder is the 10-to-4 line encoder, which will have 10 input lines and 4 output lines. The block diagram for such an encoder will show 10 input wires connected to an encoding logic that simplifies the 10 inputs into a 4-bit binary representation. This encoding logic typically includes combinational logic consisting of gates like AND, OR, and NOT that perform the necessary encoding operation. The output will then be 4 lines that represent the binary code corresponding to the input line that is active (assuming that just one input is active at any one time).
An encoder differs from a binary decoder which performs the opposite function, that is converting a binary number to its corresponding output line. Encoders are commonly used in digital circuits where there is a need to reduce the number of wires or to send a coded signal representing a particular input line.
Example: If the second input line (I1- counting from 0) is active, the outputs would be a binary representation of the number '2', which is '0010'.