## Tuesday, November 30, 2021

The beauty of LC Oscillations!

If you were to wire a charged capacitor through an inductor, you would see a wonderful exchange of energy take place between the two components. These power fluctuations sound as if the capacitor is saying, "Take energy", then the inductor says, "No, you take my energy". Why do none of them store and stabilize energy? Let's take a look at the interesting physics behind these oscillations and some of the applications.

An electronic oscillator is a circuit whose function is to produce a periodic electrical signal, in sinusoidal, square, sawtooth, or whatever shape. The oscillator can have a fixed or variable frequency. There are several types of electronic oscillators; the main ones are:

oscillators with an LC circuit and an amplifier stage, mostly HF;
phase-shift oscillators with RC stage, which deliver sinusoidal signals: the typical example is the Wien1 bridge oscillator;
slot generator;
quartz oscillator, very stable and high precision thanks to microwave resonators; they are used in atomic clocks.
We most often expect from an oscillator: either the frequency stability of its oscillations, or the stability of the signal envelope. Oscillators are therefore classified into two types: harmonic oscillators which produce a sinusoidal signal, and relaxation oscillators, rather used for the measurement of time or the timing of processes.

Oscillations can be created by exploiting certain physical effects, such as processing electrical impulses by a Gunn diode, whose characteristics exhibit a negative apparent resistance. We can thus obtain very simple signals

The beauty of LC Oscillations!

If you were to wire a charged capacitor through an inductor, you would see a wonderful exchange of energy take place between the two components. These power fluctuations sound as if the capacitor is saying, "Take energy", then the inductor says, "No, you take my energy". Why do none of them store and stabilize energy? Let's take a look at the interesting physics behind these oscillations and some of the applications.

An electronic oscillator is a circuit whose function is to produce a periodic electrical signal, in sinusoidal, square, sawtooth, or whatever shape. The oscillator can have a fixed or variable frequency. There are several types of electronic oscillators; the main ones are:

oscillators with an LC circuit and an amplifier stage, mostly HF;
phase-shift oscillators with RC stage, which deliver sinusoidal signals: the typical example is the Wien1 bridge oscillator;
slot generator;
quartz oscillator, very stable and high precision thanks to microwave resonators; they are used in atomic clocks.
We most often expect from an oscillator: either the frequency stability of its oscillations, or the stability of the signal envelope. Oscillators are therefore classified into two types: harmonic oscillators which produce a sinusoidal signal, and relaxation oscillators, rather used for the measurement of time or the timing of processes.

Oscillations can be created by exploiting certain physical effects, such as processing electrical impulses by a Gunn diode, whose characteristics exhibit a negative apparent resistance. We can thus obtain very simple signals