Analog electronic circuits are those in which the signal can vary continuously over time to match the information that is represented. Electronic equipment like voltage amplifiers, power amplifiers, tuning circuits, and radio stations are largely analog (with the exception of control sections, which may be digital, especially in modern units).
There are two main types of analog circuits: series and parallel. A string of Christmas lights is a good example of a series circuit: if one goes, everyone does. In a parallel circuit, each bulb is connected to independent power supply, so if you leave the rest are brilliant.
The fundamentals of the analog circuits are resistors, capacitors, inductors, memristor, diodes and transistors. Can be considered an asset independent power sources and energy sources to the load. Another model is to take independent power sources and induction, as the basic unit of electronics that can model frequency dependent negative resistances, spinners, negative impedance converters, and secondary sources covered electronic components.