Systems in electronics

Electronics systems diagrams are used to show how the parts of a product work together. Many electronic products are made up of a number of standard system circuits (circuits that are common to many different products), such as sensors, amplifiers, timers, counters and output devices.

System diagrams usually take the form of a block diagram in which each part of the electronic system is represented by an input, a process or an output.

The block diagrams below shows two types of system.

• The open-loop system has no feedback mechanism, so the accuracy depends on how well the system was set up before hand.
• Closed-loop electronic systems use sensors to provide feedback. This means that if the output is not satisfactory, the inputs or processes can be altered.

Close-loop system and a closed-loop system