Amplifiers and Amplification

Amplifiers are circuits that are used to increase an input signal, thus you can obtain an output signal with much greater amplitude than the original one. Amplification is the process to increase the magnitude of a signal, generally using an amplifier.

The series RC circuit.

In a series RC circuit, the current through the resistor and the capacitor is the same. The voltage VS is equal to the phasor addition of the voltage drop across the resistor (Vr) and the voltage drop across the capacitor (Vc).

Resistors in series and parallel

How to calculate resistor in series. How to calculate resistor in parallel

Air core inductor coil inductance calculation

There are some occasions when we have an air core inductor, and we don’t know what its value is. There is an easy way to obtain the air core inductor coil inductance if you have the external measurements of this component.

The Electric Power Transformer usage – The Transformer Distribution System

Electric power transformers are static electrical machines that allows modification of the voltage and the current values, so they can take the appropriate one (value) to carry and distribute the electric energy.

What is a Voltage?

Potential difference or Voltage is a kind of force that push charges through a conductor. The larger the voltage, the larger the force

What is Alternating Current?

The difference between an alternating current and a continuous current is that the continuous current flows only on one direction. The alternating current circulates first in one direction and then on the opposite one, repeating this process continuously.

Iron Core Inductor

The iron core has very special magnetic characteristics. What they do is to reinforce the magnetic field. The magnetism of the core material depends on the bias of  “the molecular magnetic domains”

Benjamin Franklin’s Fluid Theory

Benjamin Franklin imagined the electricity as a invisible fluid. Franklin assured that if any body had more fluid than usual, it could have a positive charge, but if it had less fluid than normal it had negative charge.

Current divider in parallel resistors

By using the current divider rule, we can find the current in each resistor connected in parallel. The electric current passing through a circuit of two resistors in parallel is divided in two.

Logic Levels (high, low, 0, 1)

In digital circuits is common to say that we have a “high or a “low” logic level at the input or output of a circuit. If we have a “high” level we say it is a “1” and if we have a “low” level we say that it is a “0”.

What is Resonance in RLC Circuits?

Resonance in RLC Circuits is a special condition for parallel and series RLC circuits, when capacitive reactance and inductive reactance have the same magnitude and cancel each other. This only happens at frequency fo.