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Electronic filter circuits defined by component connection
Electronic filter topology defines electronic filter circuits without taking note of the values of the components used but only the manner in which those
Electronic_filter_topology
Electronic filter topology
The Sallen–Key topology is an electronic filter topology used to implement second-order active filters that is particularly valued for its simplicity
Sallen–Key_topology
Electronic device
Electronic filters are a type of signal processing filter in the form of electrical circuits. This article covers those filters consisting of lumped electronic
Electronic_filter
Analog circuit which filters an electronic signal using an amplifier
the amplifier stages. Active filter circuit configurations (electronic filter topology) include: Sallen-Key, and VCVS filters (low sensitivity to component
Active_filter
Resistor Inductor Capacitor Circuit
band-pass filter, band-stop filter, low-pass filter or high-pass filter. The tuning application, for instance, is an example of band-pass filtering. The RLC
RLC_circuit
Resistive and inductive circuit
source. It is one of the simplest analogue infinite impulse response electronic filters. The fundamental passive linear circuit elements are the resistor
RL_circuit
Electric circuit composed of resistors and capacitors
A resistor–capacitor circuit (RC circuit), or RC filter or RC network, is an electric circuit composed of resistors and capacitors. It may be driven by
RC_circuit
Form taken by the network of interconnections of a circuit
The circuit topology of an electronic circuit is the form taken by the network of interconnections of the circuit components. Different specific values
Circuit_topology_(electrical)
Electrical resonant circuit
bandpass filter. They are key components in many electronic devices, particularly radio equipment, used in circuits such as oscillators, filters, tuners
LC_circuit
Electronic filter circuit controlled with voltage
Transistor ladder filter Diode ladder filter Sallen–Key filter OTA filter Audio filter Electronic filter Electronic filter topology Non-linear filter Self oscillation
Voltage-controlled_filter
bandpass filter is obtained consisting of just antiresonators coupled by capacitors. This was a popular topology for multi-section band-pass filters due to
General_mn-type_image_filter
Device for suppressing part of a signal
Wiener filter Kalman filter Savitzky–Golay smoothing filter Electronic filter topology Lifter (signal processing) Noise reduction Sallen–Key topology Smoothing
Filter_(signal_processing)
Type of electronic filter designed using the image method
Constant k filters, also k-type filters, are a type of electronic filter designed using the image method. They are the original and simplest filters produced
Constant_k_filter
Filter used in signal processing on continuous-time signals
linear filters which are not analogue in implementation (digital filter), and there are many electronic filters which may not have a passive topology – both
Analogue_filter
Type of signal processing filter
order of the filter. There are several different filter topologies available to implement a linear analogue filter. The most often used topology for a passive
Butterworth_filter
Type of electronic filter
m-derived filters or m-type filters are a type of electronic filter designed using the image method. They were invented by Otto Zobel in the early 1920s
M-derived_filter
Type of filter in signal processing
has media related to Zobel networks. Electronic filter topology Image impedance Constant k filters m-derived filters Boucherot cell Zobel, Otto J. (1923)
Zobel_network
Electronic circuit element implementing a filter
this held sampled value through switch S2 to an electronic circuit for processing. Electronic filters consisting of resistors and capacitors can have
Switched_capacitor
Type of signal processing filter
phase between input and output varies with frequency. The lattice filter topology has the particular property of being a constant-resistance network
Lattice_phase_equaliser
Type of filter
A capacitor-input filter is a filter circuit in which the first element is a capacitor connected in parallel with the output of the rectifier in a linear
Capacitor-input_filter
mm'-type filters, also called double-m-derived filters, are a type of electronic filter designed using the image method. They were patented by Otto Zobel
Mm'-type_filter
bridged-T delay equaliser is an electrical all-pass filter circuit utilising bridged-T topology whose purpose is to insert an (ideally) constant delay
Bridged_T_delay_equaliser
Signal processing filter
application in electronic music production is in the design of an effects unit known as a "phaser", where a number of all-pass filters are connected in
All-pass_filter
Topics referred to by the same term
Look up Filter, filter, filtering, or filters in Wiktionary, the free dictionary. Filter, filtering, filters or filtration may also refer to: Filter (higher-order
Filter
Electronic filters designed by the network synthesis method
needed to build the corresponding filter. In general, the sections of a network synthesis filter are of identical topology (usually the simplest ladder type)
Network_synthesis_filters
Two-port electrical wave filter
A symmetrical lattice is a two-port electrical wave filter in which diagonally-crossed shunt elements are present – a configuration which sets it apart
Lattice_network
Template for electronic filter design
Prototype filters are electronic filter designs that are used as a template to produce a modified filter design for a particular application. They are
Prototype_filter
Type of signal filter
Low-pass filters exist in many different forms, including electronic circuits such as a hiss filter used in audio, anti-aliasing filters for conditioning
Low-pass_filter
Circuits used to correct network or transmission line errors
, “Design and Group-delay Correction of a Low-pass Filter for use in Video Circuits”, Electronic Engineering, August 1966 (pp. 520–524) Crane R.L., “All-Pass
Lattice and bridged-T equalizers
Lattice_and_bridged-T_equalizers
Filter that has a linear response
signal processing filters in the time domain are inevitably causal, an additional constraint on their transfer functions. An analog electronic circuit consisting
Linear_filter
Type of electronic filter used in audio
slope. They can be realized by cascading two one-pole filters or by using a Sallen Key filter topology with a Q0 value of 0.5. There is a 180° phase difference
Linkwitz–Riley_filter
Type of variable active electronic filter
A state variable filter (SVF) is a type of active filter in electronic circuits. In a state-variable filter architecture the signal and its successive
State_variable_filter
Type of electronic filter circuit
A distributed-element filter is an electronic filter in which capacitance, inductance, and resistance (the elements of the circuit) are not localised in
Distributed-element_filter
Type of analog or digital filter
Chebyshev filters are analog or digital filters that have a steeper roll-off than Butterworth filters, and have either passband ripple (type I) or stopband
Chebyshev_filter
Type of electronic circuit or optical filter
A high-pass filter (HPF) is an electronic filter that passes signals with a frequency higher than a certain cutoff frequency and attenuates signals with
High-pass_filter
Hungarian-American mathematician (1923-2005)
his experience with network synthesis and electronic filter topology introduced him to algebraic topology. Bott met Arnold S. Shapiro at the IAS and
Raoul_Bott
Filter that rejects signals outside a certain range
and acoustic filters which allow through sound waves of a specific band of frequencies. An example of an analogue electronic band-pass filter is an RLC circuit
Band-pass_filter
Type of signal processing filter
A mechanical filter is a signal processing filter usually used in place of an electronic filter at radio frequencies. Its purpose is the same as that of
Mechanical_filter
Type of electronic filter
A line filter (a.k.a. EMC filter, EMI filter, RFI filter) is an electronic filter that is placed between the mains electricity input and internal circuitry
Line_filter
Mathematical method for optimizing material layout under given conditions
Topology optimization is a mathematical method that optimizes material layout within a given design space, for a given set of loads, boundary conditions
Topology_optimization
Property of many linear time-invariant (LTI) systems
analog electronic filters are IIR, digital filters may be either IIR or FIR. The presence of feedback in the topology of a discrete-time filter (such as
Infinite_impulse_response
Changing the balance of frequency components in an audio signal
verification] to achieve filtering circuits that were previously impossible. Flickinger's patent from early in 1971 showed the circuit topology that would come
Audio_equalization
Mathematical operation on a sampled signal
type of electronic filter, the analog filter, which is typically an electronic circuit operating on continuous-time analog signals. A digital filter system
Digital_filter
Electronic filter
composite image filter is an electronic filter consisting of multiple image filter sections of two or more different types. The image method of filter design determines
Composite_image_filter
active EMI filtering) refers to techniques aimed to reduce or to filter Electromagnetic interference (EMI) making use of active electronic components
Active_EMI_reduction
Power supply with switching regulator
Ćuk converter. The neutral point clamped (NPC) topology is used in power supplies and active filters and is mentioned here for completeness. Switchers
Switched-mode_power_supply
Type of adjustable-speed drive
Alberta Chapter: 1–78. McMurray, William (April 1988). "Power Electronic Circuit Topology". Proceedings of the IEEE. 76 (4): 428–437. doi:10.1109/5.4428
Variable-frequency_drive
Arrangement of a communication network
Network topology is the arrangement of the elements (links, nodes, etc.) of a communication network. Network topology can be used to define or describe
Network_topology
Feature of filter frequency response
or when the popular ladder topology construction is used to realise the filter. In a ladder filter each section of the filter has an effect on its immediate
Roll-off
complements of principal filters on P. The Lawson topology on P is the smallest common refinement of the lower topology and the Scott topology on P. If P is a
Lawson_topology
Type of electronic oscillator
specific topology and technology used. Leeson's model provides useful results but does not capture the mechanisms by which transistor electronic noise is
Cross-coupled_LC_oscillator
Multiple equivalent ways to define a topological space
textbooks allow a filter to contain the empty set, and reserve the name "proper filter" for the case in which it is excluded. A topology on X {\displaystyle
Axiomatic foundations of topological spaces
Axiomatic_foundations_of_topological_spaces
Relation of types of systems with corresponding dynamics
impedance but does not preserve the network topology. The mobility analogy preserves the network topology but does not preserve the analogy between impedances
Analogical_models
Electronic filter circuitry used in loudspeakers
Audio crossovers are a type of electronic filter circuitry that splits an audio signal into two or more frequency ranges, so that the signals can be sent
Audio_crossover
Assemblage of connected electrical elements
Mathematical methods in electronics Superposition theorem Topology (electronics) Mesh analysis Prototype filter Network analyzer (electrical) Network analyzer (AC
Electrical_network
required that its response in both halves are symmetrical. Lattice topology filters are not very common. The reason for this is that they require more
Bartlett's_bisection_theorem
filters do not work in log domain, producing incorrect, irrelevant output. Correct time-averaging required nonlinear filters of yet unknown topology.
Blackmer_RMS_detector
Electronic filter that is constructed with waveguide technology
A waveguide filter is an electronic filter constructed with waveguide technology. Waveguides are hollow metal conduits inside which an electromagnetic
Waveguide_filter
Residual periodic variation of voltage
digital circuits to operate improperly. Ripple may be reduced by an electronic filter, and eliminated by a voltage regulator. A non-ideal DC voltage waveform
Ripple_(electrical)
Image impedance is a concept used in electronic network design and analysis and most especially in filter design. The term image impedance applies to the
Image_impedance
Gaelic football, rugby, hurling) are described as "H-shaped" H topology in electronic filter design Also see Balbis I-shape, the shape that resembles the
Glossary of shapes with metaphorical names
Glossary_of_shapes_with_metaphorical_names
decoding while treating the channel as a convolutional code. Electronic filter Weighting filter RIAA equalization Cenk Toker. "Class handout on MMSE equalizers"
Equalization_(communications)
Canceling impedances at a particular frequency
the supply voltage. Antiresonance Antenna theory Cavity resonator Electronic filter Resonant energy transfer - wireless energy transmission between two
Electrical_resonance
Microphone that filters ambient noise
microphone that is designed to filter ambient noise. The development is a special case of the differential microphone topology most commonly used to achieve
Noise-canceling_microphone
DC linear voltage regulator
The noise from the LDO itself must also be considered in filter design. Like other electronic devices, LDOs are affected by thermal noise, bipolar shot
Low-dropout_regulator
Two-port non-reciprocal network element
range. The parasitic resistance of a gyrator depends on the topology, but with the topology shown, series resistances will typically range from tens of
Gyrator
Device that changes direct current (DC) to alternating current (AC)
quite noisy. A series LC filter tuned to the fundamental frequency may help. A common modified sine wave inverter topology found in consumer power inverters
Power_inverter
Device to limit the current in lamps
vibration of the core laminations. Electronic ballasts are often based on switched-mode power supply (SMPS) topology, first rectifying the input power
Electrical_ballast
equivalent circuit, not a dual circuit. Filters designed using Cauer's topology of the first form are low-pass filters consisting of a ladder network of series
Dual_impedance
American electrical engineer (1887–1970)
crossover filter for woofer and tweeter loudspeakers. The output design was identical in topology to a design found in a patent of Zobel's for a filter to separate
Otto_Julius_Zobel
Signal amplifier that doesn't significantly degrade the signal-noise ratio
noise, by choosing special components, operating points, and circuit topologies. Minimizing additional noise must balance with other design goals such
Low-noise_amplifier
Equivalent circuit for impedance networks
networks but this includes many topologies commonly found in filters, attenuators and equalisers. The lattice topology is intrinsically balanced, there
Equivalent impedance transforms
Equivalent_impedance_transforms
Device that routes electric current around a point in a circuit
other circuit components. The term shunt is used in filter and similar circuits with a ladder topology to refer to the components connected between the line
Shunt_(electrical)
Electronic circuit
An active-filter tuned oscillator is an active electronic circuit designed to produce a periodic signal. It consists of a bandpass filter and an active
Active-filter tuned oscillator
Active-filter_tuned_oscillator
Electronic device that converts or regulates electric energy and supplies it to a load
rectified and then filtered to obtain a DC voltage. The resulting DC voltage is then switched on and off at a high frequency by electronic switching circuitry
Power_supply
Device for receiving radio transmissions
receiver uses electronic filters to separate the desired radio-frequency signal from other signals picked up by the antenna, an electronic amplifier to
Radio_receiver
Technology of power electronics
V (2006). Electronic engineering. ISBN 978-9985-69-039-0. Lipo; Kim, Sul (2000). "AC/AC Power Conversion Based on Matric Converter Topology with Unidirectional
Power_electronics
Regulating device used on transmission networks
switching at high-power levels. 3-level topologies have begun to give way to Multi-Modular Converter (MMC) Topologies, which allow for more levels in the
Static synchronous compensator
Static_synchronous_compensator
In the branch of mathematics known as topology, the specialization (or canonical) preorder is a natural preorder on the set of the points of a topological
Specialization_preorder
Electrical circuit with equal-length transmission lines
microstrip technology and other planar technologies. Filter circuits frequently use a ladder topology with alternating series and shunt elements. Such circuits
Commensurate_line_circuit
Type of topological space
In mathematics, and specifically in topology, a CW complex (also cellular complex or cell complex) is a topological space that is built by gluing together
CW_complex
Resonator damping parameter
Sallen–Key lowpass filter topology with equal capacitors and equal resistors is critically damped (i.e., Q = 1/2). A second-order Bessel filter (i.e., continuous-time
Q_factor
Technology used to provide broadband to the end consumer via fiber
point-to-multipoint topology in which an ISP uses a single device to serve many end-user sites using a system such as 10G-PON or GPON. In this one-to-many topology, a
Passive_optical_network
Circuit arrangement of four diodes
with various voltage and current ratings. Diodes are also used in bridge topologies along with capacitors as voltage multipliers. The diode bridge circuit
Diode_bridge
Electrical circuit to change input voltage
circuit due to the use of two pi filters in series and split with the switching MOSFET bridges. Other DC–DC converter topologies that can produce output voltage
Split-pi_topology
Applied protection for softer materials
surfaces depend on the topology (surface) factors of surface texture (lay) and spacing of irregularities (waviness). Topology is controlled with precision
Anti-scratch_coating
Electronic device/component that increases the strength of a signal
An amplifier, electronic amplifier or (informally) amp is an electronic device that can increase the magnitude of a signal (a time-varying voltage or
Amplifier
Type of electronic circuit
A DC-to-DC converter is an electronic circuit or electromechanical device that converts a source of direct current (DC) from one voltage level to another
DC-to-DC_converter
Point of entry and exit of electrical energy to/from a circuit
circuit analysis. Many common electronic devices and circuit blocks, such as transistors, transformers, electronic filters, and amplifiers, are analyzed
Port_(circuit_theory)
Models replicating electronic behavior
Electronic circuit simulation uses mathematical models to replicate the behavior of an actual electronic device or circuit. Simulation software allows
Electronic_circuit_simulation
Electronic circuit with sine-wave output
oscillators are often used at audio frequency as audio oscillators. The filter produces a phase shift that increases with frequency. It must have a maximum
Phase-shift_oscillator
sharing Time-invariant system Timeline of electrical and electronic engineering Tin Topology (electrical circuits) Toroidal inductors and transformers
Index of electrical engineering articles
Index_of_electrical_engineering_articles
Measure of change in amplitude and phase of a wave
constant is a useful concept in filter design which invariably uses a cascaded section topology. In a cascaded topology, the propagation constant, attenuation
Propagation_constant
Electrical circuit
opposite task of an amplifier. The topology of an attenuator circuit will usually follow one of the simple filter sections. However, there is no need
Π_pad
German mathematician and scientist (1900–1945)
synthesis of electrical filters and his work marked the beginning of the field of network synthesis. Prior to his work, electronic filter design used techniques
Wilhelm_Cauer
Electronic oscillator
two capacitors, and the quartz crystal, which acts as a highly selective filter element. The low manufacturing cost of this circuit and the frequency stability
Pierce_oscillator
Type of attenuator circuit
opposite task of an amplifier. The topology of an attenuator circuit will usually follow one of the simple filter sections. However, there is no need
T_pad
known as an alternating topology, which means that CW TEs alternate with CCW TEs. Here's the same circuit in a stacked topology. The same equation applies
Translinear_circuit
English mathematician (1935–2024)
groupoid (1998), Topology and Groupoids (2006) and Nonabelian Algebraic Topology: Filtered Spaces, Crossed Complexes, Cubical Homotopy Groupoids (EMS, 2010)
Ronald_Brown_(mathematician)
device or system. electronic engineering The profession of applying electronics to practical problems. electronic filter A filter that alters some frequency-related
Glossary of electrical and electronics engineering
Glossary_of_electrical_and_electronics_engineering
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