Passive devices in electronic systems can be divided into circuit devices and connection devices according to their circuit functions.
1. circuit devices
(1) diode
(2) resistor
(3) resistor network
(4) capacitor
(5) inductor
(6) transformer
(7) relay
(8) key
(9) transducer、speaker
(10) switch
2. connection devices
(1) connector
(2) shoket
(3) line
(4) pcb
Passive components are mainly resistors, inductors and capacitors. The common feature of passive components is that they can work without adding power in the circuit when there is a signal.These passive components are important parts for power filters.
