73 relations: Active filter, Admittance parameters, Angular velocity, Band-stop filter, Bell System Technical Journal, Bernard D. H. Tellegen, Capacitor, Characteristic impedance, Circulator, Current–voltage characteristic, Data access arrangement, Direct current, Distributed element circuit, Electrical element, Electrical impedance, Electrical network, Electrical resistance and conductance, Electrode, Electronic component, Electronic filter, Electronic symbol, Equalization (audio), Equivalent circuit, Feedback, Geometric mean, Gyrator–capacitor model, Gyroscope, High fidelity, High voltage, Impedance analogy, Impedance parameters, Inductance, Inductor, Integrated circuit, Isolator (microwave), Line card, Lumped element model, Magnetic reluctance, Magnetoelectric effect, Magnetostriction, Mechanical filter, Mechanical–electrical analogies, Microwave, Miniaturization, Multiferroics, Negative impedance converter, Network synthesis filters, One-line diagram, Operational amplifier, Parasitic element (electrical networks), ..., Passivity (engineering), Permeance, Piezoelectricity, Pilot signal, Plain old telephone service, Port (circuit theory), Q factor, Quarter-wave impedance transformer, Reciprocity (electromagnetism), Resistor, RLC circuit, Rotation around a fixed axis, Rumble (noise), Sallen–Key topology, Scattering parameters, Skew-symmetric matrix, Torque, Transducer, Transistor, Transmission line, Two-port network, Ultrasonic transducer, Waveguide (electromagnetism). Expand index (23 more) » « Shrink index
An active filter is a type of analog circuit implementing an electronic filter using active components, typically an amplifier.
Admittance parameters or Y-parameters (the elements of an admittance matrix or Y-matrix) are properties used in many areas of electrical engineering, such as power, electronics, and telecommunications.
In physics, the angular velocity of a particle is the rate at which it rotates around a chosen center point: that is, the time rate of change of its angular displacement relative to the origin.
In signal processing, a band-stop filter or band-rejection filter is a filter that passes most frequencies unaltered, but attenuates those in a specific range to very low levels.
The Bell System Technical Journal was a periodical publication by the American Telephone and Telegraph Company (AT&T) in New York devoted to the scientific and engineering aspects of electrical communication.
Bernard D.H. Tellegen (24 June 1900 – 30 August 1990) was a Dutch electrical engineer and inventor of the pentode and the gyrator.
A capacitor is a passive two-terminal electrical component that stores potential energy in an electric field.
The characteristic impedance or surge impedance (usually written Z0) of a uniform transmission line is the ratio of the amplitudes of voltage and current of a single wave propagating along the line; that is, a wave travelling in one direction in the absence of reflections in the other direction.
A circulator is a passive non-reciprocal three- or four-port device, in which a microwave or radio frequency signal entering any port is transmitted to the next port in rotation (only).
A current–voltage characteristic or I–V curve (current–voltage curve) is a relationship, typically represented as a chart or graph, between the electric current through a circuit, device, or material, and the corresponding voltage, or potential difference across it.
The term data access arrangement (DAA) has the following meanings.
Direct current (DC) is the unidirectional flow of electric charge.
Distributed element circuits are electrical circuits composed of lengths of transmission lines or other distributed components.
Electrical elements are conceptual abstractions representing idealized electrical components, such as resistors, capacitors, and inductors, used in the analysis of electrical networks.
Electrical impedance is the measure of the opposition that a circuit presents to a current when a voltage is applied.
An electrical network is an interconnection of electrical components (e.g. batteries, resistors, inductors, capacitors, switches) or a model of such an interconnection, consisting of electrical elements (e.g. voltage sources, current sources, resistances, inductances, capacitances).
The electrical resistance of an electrical conductor is a measure of the difficulty to pass an electric current through that conductor.
An electrode is an electrical conductor used to make contact with a nonmetallic part of a circuit (e.g. a semiconductor, an electrolyte, a vacuum or air).
An electronic component is any basic discrete device or physical entity in an electronic system used to affect electrons or their associated fields.
Electronic filters are circuits which perform signal processing functions, specifically to remove unwanted frequency components from the signal, to enhance wanted ones, or both.
An electronic symbol is a pictogram used to represent various electrical and electronic devices or functions, such as wires, batteries, resistors, and transistors, in a schematic diagram of an electrical or electronic circuit.
Equalization or equalisation is the process of adjusting the balance between frequency components within an electronic signal.
In electrical engineering and science, an equivalent circuit refers to a theoretical circuit that retains all of the electrical characteristics of a given circuit.
Feedback occurs when outputs of a system are routed back as inputs as part of a chain of cause-and-effect that forms a circuit or loop.
In mathematics, the geometric mean is a mean or average, which indicates the central tendency or typical value of a set of numbers by using the product of their values (as opposed to the arithmetic mean which uses their sum).
The gyrator–capacitor model is a lumped-element model for magnetic fields, similar to magnetic circuits, but based on using elements analogous to capacitors (see magnetic capacitance) rather than elements analogous to resistors (see magnetic reluctance) to represent the magnetic flux path.
A gyroscope (from Ancient Greek γῦρος gûros, "circle" and σκοπέω skopéō, "to look") is a device used for measuring or maintaining orientation and angular velocity.
High fidelity (often shortened to hi-fi or hifi) is a term used by listeners, audiophiles and home audio enthusiasts to refer to high-quality reproduction of sound.
The term high voltage usually means electrical energy at voltages high enough to inflict harm on living organisms.
The impedance analogy is a method of representing a mechanical system by an analogous electrical system.
Impedance parameters or Z-parameters (the elements of an impedance matrix or Z-matrix) are properties used in electrical engineering, electronic engineering, and communication systems engineering to describe the electrical behavior of linear electrical networks.
In electromagnetism and electronics, inductance is the property of an electrical conductor by which a change in electric current through it induces an electromotive force (voltage) in the conductor.
An inductor, also called a coil, choke or reactor, is a passive two-terminal electrical component that stores energy in a magnetic field when electric current flows through it.
An integrated circuit or monolithic integrated circuit (also referred to as an IC, a chip, or a microchip) is a set of electronic circuits on one small flat piece (or "chip") of semiconductor material, normally silicon.
An isolator is a two-port device that transmits microwave or radio frequency power in one direction only.
A line card or digital line card is a modular electronic circuit designed to fit on a separate printed circuit board (PCB) and interface with a telecommunications access network.
The lumped element model (also called lumped parameter model, or lumped component model) simplifies the description of the behaviour of spatially distributed physical systems into a topology consisting of discrete entities that approximate the behaviour of the distributed system under certain assumptions.
Magnetic reluctance, or magnetic resistance, is a concept used in the analysis of magnetic circuits.
In its most general form, the magnetoelectric effect (ME) denotes any coupling between the magnetic and the electric properties of a material.
Magnetostriction (cf. electrostriction) is a property of ferromagnetic materials that causes them to change their shape or dimensions during the process of magnetization.
A mechanical filter is a signal processing filter usually used in place of an electronic filter at radio frequencies.
Mechanical–electrical analogies are the representation of mechanical systems as electrical networks.
Microwaves are a form of electromagnetic radiation with wavelengths ranging from one meter to one millimeter; with frequencies between and.
Miniaturization (Br.Eng.: Miniaturisation) is the trend to manufacture ever smaller mechanical, optical and electronic products and devices.
Multiferroics are defined as materials that exhibit more than one of the primary ferroic properties.
The negative impedance converter (NIC) is a one-port op-amp circuit acting as a negative load which injects energy into circuits in contrast to an ordinary load that consumes energy from them.
Network synthesis is a method of designing signal processing filters.
In power engineering, a one-line diagram or single-line diagram (SLD) is a simplified notation for representing a three-phase power system.
An operational amplifier (often op-amp or opamp) is a DC-coupled high-gain electronic voltage amplifier with a differential input and, usually, a single-ended output.
In electrical networks, a parasitic element is a circuit element (resistance, inductance or capacitance) that is possessed by an electrical component but which it is not desirable for it to have for its intended purpose.
Passivity is a property of engineering systems, used in a variety of engineering disciplines, but most commonly found in analog electronics and control systems.
Permeance, in general, is the degree to which a material admits a flow of matter or energy.
Piezoelectricity is the electric charge that accumulates in certain solid materials (such as crystals, certain ceramics, and biological matter such as bone, DNA and various proteins) in response to applied mechanical stress.
In telecommunications, a pilot signal is a signal, usually a single frequency, transmitted over a communications system for supervisory, control, equalization, continuity, synchronization, or reference purposes.
Plain old telephone service or plain ordinary telephone service (POTS) is a retronym for voice-grade telephone service employing analog signal transmission over copper loops.
In electrical circuit theory, a port is a pair of terminals connecting an electrical network or circuit to an external circuit, a point of entry or exit for electrical energy.
In physics and engineering the quality factor or Q factor is a dimensionless parameter that describes how underdamped an oscillator or resonator is, and characterizes a resonator's bandwidth relative to its centre frequency.
A quarter-wave impedance transformer, often written as λ/4 impedance transformer, is a component used in electrical engineering consisting of a length of transmission line or waveguide exactly one-quarter of a wavelength (λ) long and terminated in some known impedance.
In classical electromagnetism, reciprocity refers to a variety of related theorems involving the interchange of time-harmonic electric current densities (sources) and the resulting electromagnetic fields in Maxwell's equations for time-invariant linear media under certain constraints.
A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element.
An RLC circuit is an electrical circuit consisting of a resistor (R), an inductor (L), and a capacitor (C), connected in series or in parallel.
Rotation around a fixed axis or about a fixed axis of revolution or motion with respect to a fixed axis of rotation is a special case of rotational motion.
A rumble is a continuous deep, resonant sound, such as the sound made by heavy vehicles or thunder.
The Sallen–Key topology is an electronic filter topology used to implement second-order active filters that is particularly valued for its simplicity.
Scattering parameters or S-parameters (the elements of a scattering matrix or S-matrix) describe the electrical behavior of linear electrical networks when undergoing various steady state stimuli by electrical signals.
In mathematics, particularly in linear algebra, a skew-symmetric (or antisymmetric or antimetric) matrix is a square matrix whose transpose equals its negative; that is, it satisfies the condition In terms of the entries of the matrix, if aij denotes the entry in the and; i.e.,, then the skew-symmetric condition is For example, the following matrix is skew-symmetric: 0 & 2 & -1 \\ -2 & 0 & -4 \\ 1 & 4 & 0\end.
Torque, moment, or moment of force is rotational force.
A transducer is a device that converts energy from one form to another.
A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power.
In communications and electronic engineering, a transmission line is a specialized cable or other structure designed to conduct alternating current of radio frequency, that is, currents with a frequency high enough that their wave nature must be taken into account.
A two-port network (a kind of four-terminal network or quadripole) is an electrical network (circuit) or device with two pairs of terminals to connect to external circuits.
Ultrasonic transducers or ultrasonic sensors are a type of acoustic sensor divided into three broad categories: transmitters, receivers and transceivers.
In electromagnetics and communications engineering, the term waveguide may refer to any linear structure that conveys electromagnetic waves between its endpoints.