193 articles
Full-bridge converter
A full-bridge converter is an isolated DC-DC power converter in which four switches drive a transformer primary, the standard choice for medium-to-high-power conversion above roughly 500 W.
FxLMS algorithm
The FxLMS algorithm is an adaptive control algorithm for active noise control, filtering its reference signal through an estimate of the secondary path to remain stable.
Gain (electronics)
Gain, also called amplifier gain or audio gain, is the ratio of an amplifier's output signal magnitude to its input signal magnitude, a dimensionless ratio almost always expressed in decibels.
GaN-on-Si RF power amplifier
A GaN-on-Si RF power amplifier is a radio-frequency power amplifier made from gallium nitride transistors grown on silicon, combining GaN performance with low-cost, large-wafer silicon manufacturing for 5G.
Gaussian filter
A Gaussian filter is a filter whose impulse response is a Gaussian function, used in signal processing as a low-pass smoothing filter with no overshoot.
Gilbert cell
The Gilbert cell is a four-quadrant analog multiplier circuit built from a transconductance stage and cross-coupled switching transistors, first used as a mixer by Barrie Gilbert around 1968.
Graphene RF mixer
A graphene RF mixer is a frequency-conversion circuit that uses graphene, typically in a GFET or diode, covering radio inputs from about 10 MHz to 700 GHz.
H-infinity filtering
H-infinity filtering is a robust state-estimation method that reconstructs a dynamic system's states from noisy measurements while minimizing worst-case error from disturbances, without requiring any statistical model of the noise.
High-pass filter
A high-pass filter, also known as a low-cut or bass-cut filter, passes signals above its cutoff frequency and attenuates lower ones, blocking DC while passing AC.
Hysteresis current control
Hysteresis current control is a current-regulation method for power converters that switches to keep output current within a tolerance band around a reference current, used in motor drives and active power filters.
Impedance analyzer
An impedance analyzer is an electronic test instrument that measures the complex impedance of components, circuits, or materials across a swept frequency range, displaying results graphically.
Intermodulation
Intermodulation is the generation of signals at linear combinations of input frequencies in nonlinear devices such as amplifiers, a principal limit on dynamic range in radio systems.
Lattice filter
A lattice filter is a digital filter structure built from identical cascaded stages, each defined by one reflection coefficient, used in speech processing and adaptive filtering.
LED circuit
An LED circuit, or LED driver, is an electrical circuit that drives light-emitting diodes at a controlled current, usually through a resistor or a constant-current regulator.
Level shifter
A level shifter, also called a voltage translator, is a circuit that converts digital or analog signals between voltage domains so chips and devices at different supply voltages can communicate.
Linearly constrained minimum variance beamforming
Linearly constrained minimum variance (LCMV) beamforming is an adaptive sensor array technique, introduced by O. L. Frost III in 1972, that minimizes output noise and interference while preserving unity gain toward a desired direction.
Logic analyzer
A logic analyzer, also known as a digital logic analyser, is a test instrument that records digital signals as 1s and 0s, invented in 1973 for debugging microprocessor systems.
Low-noise amplifier
A low-noise amplifier (LNA) is an electronic amplifier placed as the first stage of a receiver chain, boosting weak signals while adding as little noise as possible.
Low-pass filter
A low-pass filter, also called a high-cut or treble-cut filter, is a circuit or algorithm that passes signals below a chosen cutoff frequency and attenuates signals above it.
Matrix converter
A matrix converter is a direct AC-to-AC power converter that uses nine bidirectional switches to control voltage and frequency without a DC link, commercialized by Yaskawa in 2005.
Mesh analysis
Mesh analysis, also called the mesh current or loop current method, solves planar electrical circuits by assigning a circulating current to each mesh and applying Kirchhoff's Voltage Law.
Minimum variance distortionless response
The minimum variance distortionless response (MVDR) beamformer, or Capon beamformer, is an adaptive array-processing method introduced by J. Capon in 1969 and widely used in radar, sonar, and communications.
Multilevel inverter
A multilevel inverter is a power converter that combines several DC voltage levels into a stepped AC waveform with lower harmonic distortion than a conventional two-level inverter.
Multiplexer
A multiplexer, or data selector, selects one of several input signals and forwards it to a single output, or combines several signals into one composite signal for transmission.
Multivibrator
A multivibrator is an electronic circuit of two inverting amplifier stages with positive feedback, producing non-sinusoidal waveforms; it takes astable, monostable, and bistable forms, the last being the flip-flop.
N-path filter
An N-path filter is a radio-frequency bandpass filter built from switches and capacitors driven by N clock phases, giving CMOS receivers a high-Q, widely tunable filter without off-chip components.
Network analysis (electrical circuits)
Network analysis, also known as circuit theory, is the set of methods for determining voltages and currents in electrical circuits, chiefly through nodal and mesh analysis.
Network synthesis
Network synthesis is the branch of circuit theory that derives a physical electrical network, both its topology and element values, from a prescribed input-output relationship, the inverse of network analysis.
Neutral-point-clamped inverter
The neutral-point-clamped (NPC) inverter is a three-level multilevel inverter introduced by Akira Nabae, Isao Takahashi, and Hirofumi Akagi in 1981, now widely used in medium-voltage motor drives and grid-connected photovoltaic systems.
Nodal analysis (electrical circuits)
Nodal analysis is a circuit analysis method that determines the voltage at every node of an electrical circuit by applying Kirchhoff's current law at each node.