Automobile Electrical and Electronic Systems, 5th Edition

Electrical and electronic principles

27

Figure 1.35 Combinational logic to compare inputs

Key fact

Circuits that have the ability to

memorize previous inputs or

logic states, are known as

sequential logic circuits.

outputs. The rst stage in the design process of creating a combinational logic

circuit is to dene the required relationship between the inputs and outputs.

Let’s consider a situation where we need a circuit to compare two sets of three

inputs and, if they are not the same, to provide a single logic ‘1’ output. This is

oversimplied, but could be used to compare the actions of a system with twin

safety circuits, such as an ABS ...