Classification of radio-components

Passive and active electronic components

Different types of electronic devices consist of passive and active elements. Such passive elements as capacitors, coils, resistors, and transformers are used for distribution of energy in circuits. Their functions are to consume and dissipate power. The gain power in such circuits is less than one

,

were: P_out and P_in -are output and input power.

Active elements are used in the circuits which amplify power. They operate using electric, thermal, optical, and acoustic phenomena in a solid body, liquid, vacuum, gas, and plasma. Active elements are used to control electric parameters and characteristics. It is impossible to take apart, assemble or repair such elements. They carry out functions of rectification, amplification, oscillation, frequency converting, and other active processes.