Introduction to Signal Generators The function of a signal generator is to produce time a dependent signal with some special characteristics of frequency, amplitude and shape. Sometimes these features are controlled externally throughout control signals.  The voltage-controlled oscillator or VCO is a clear example. To ensure that the signal generator acheives its function, some kind of feedback devices are used. These devices have features that […]

How the microwave oven was discovered? The microwave oven was invented in 1947 by Percy Spencer. While working at the Raytheon Company, Mr Spencer discovered that a bar of chocolate in his jacket pocket had melted. This led to the creation of one of the most widely used household appliances. Mr Spencer conducted research using […]

The Thevenin’s theorem is used to convert a two terminal circuit, into a very simple circuit containing one voltage source in series with a single resistor

Electric Current Definition The electric current is a current of electrons that crosses a material. Some conductive materials have free electrons that easily pass from an atom to another. These free electrons, if they move in the same direction as they jump from one atom to another one, become an electric current. To achieve this movement of electrons, […]

Electric Conductors: General characteristics The electric conductors are metal threads (copper or aluminum) that are used to conduct electric current. Electric conductors are used in: Electric facilities (housing, industry, trade, etc.) Car electric installations, and… Construction of inductors The most commonly used types of conductors are: wires, cables, conductors with protective cover. Wires Wires are electric conductors made of a single metal thread, and they can be […]