Four-terminal network is an abstract element of an electrical circuit, having four terminals - two-input and two-output. The four-terminal network is depicted below. If…
Category: Year 1
Semiconductors and their properties
Semiconductors are a class of materials with electron conductivity. Their resistance value is between metal and insulator resistances at normal temperatures. The main feature…
Electronic filter
Electronic filters are four-terminal devices that serve to transfer electrical current between the source and load in a certain frequency range. The transparency range…
Three-phase circuits
Three-phase circuits of voltage supplies are the three connected voltage supplies, with the same magnitude of amplitude and frequency, but shifted to 120 grad.…
Periodic non-sinusoidal currents in linear circuits
Periodic non-sinusoidal currents and voltages are those that change in a periodical non-sinusoidal way. It may happen when the source is generating non-sinusoidal signals, and…
Transient processes in linear circuits
Transient processes in electrical circuits are the processes of transition from one work regime to another, that differ with parameters. Transient processes are caused…
Non-linear DC electric circuits
Non-linear electric circuits contain non-linear components. Non-linear electric components are characterised with non-linear volt-ampere characteristics, as depicted on the figure below. Non-linear components can…
Magnetic circuits
Magnetic circuit is a set of components, combined in one circuit, that create a magnetic field loop. In calculating magnetic circuits we must remember…
Non-linear AC circuits
Non-linear AC circuits are AC circuits containing non-linear components. Nonlinear components can be resistive, capacitive, and inductive. Non-linear resistors can be inertial, and non-inertial.…
Optical and photoelectrical properties of semiconductors
Light absorption When light penetrates the semiconductor, it starts the process of exchanging energy with crystalline lattice. Let us determine I as a light…