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Capacitor whose capacitance can be changed
variable capacitor is a capacitor whose capacitance may be intentionally and repeatedly changed mechanically or electronically. Variable capacitors are
Variable_capacitor
A vacuum variable capacitor is a variable capacitor which uses a high vacuum as the dielectric instead of air or other insulating material. This allows
Vacuum_variable_capacitor
Discrete device in an electronic system
LC-circuits Vacuum variable capacitor Capacitors for special applications Power capacitor Safety capacitor Filter capacitor Light-emitting capacitor (LEC) Motor
Electronic_component
Electronic component
value capacitors are available with a high vacuum between their plates to allow extremely high voltage operation and low losses. Variable capacitors with
Capacitor
Pictogram used to represent various electrical and electronic devices or functions
(ANSI) Capacitor (IEC 60617 style) Polarized capacitor (IEC 60617 style) Polarized capacitor (old alternate IEEE 315 style) Variable capacitor (IEC 60617
Electronic_symbol
Speed of electromagnetic waves in vacuum
determined by measuring the capacitance and dimensions of a capacitor, whereas the value of the vacuum permeability was historically fixed at exactly 4π×10−7 H⋅m−1
Speed_of_light
Manufacturing styles of an electronic device
like a variable capacitor. They have replaced much of the tuning and trimmer capacitors. Variable capacitors Air gap tuning capacitor Vacuum tuning capacitor
Capacitor_types
Location identifier for a circuit component
Thin-film transistor (display) TH: Thermistor VC: Variable capacitor VDR: Voltage-dependent resistor VFD: Vacuum fluorescent display VT: Voltage transformer
Reference_designator
Device that controls current between electrodes
windings, one or more rectifiers (which may themselves be vacuum tubes), and large filter capacitors provided the required direct current voltages from the
Vacuum_tube
Type of capacitor
circuits for variable-frequency drives, for coupling signals between amplifier stages, and storing energy as in a flashlamp. Electrolytic capacitors are polarized
Electrolytic_capacitor
Type of radio antenna consisting of a loop or coil
resonating capacitor with a large breakdown voltage, in addition to having minimal dielectric loss (normally requiring an air-gap capacitor or even a vacuum variable
Loop_antenna
Electrical device that converts AC to DC
heat) in the capacitor, rectifier and transformer windings, and may exceed the ampacity of the components or VA rating of the transformer. Vacuum tube rectifiers
Rectifier
Space that is empty of matter
A vacuum (pl.: vacuums or vacua) is space devoid of matter. The word is derived from the Latin adjective vacuus (neuter vacuum) meaning "vacant" or "void"
Vacuum
Class of electrical battery
In the early days of electronics, devices that used vacuum tubes (called valves in British contexts), such as radios, were powered by batteries. Each battery
Vacuum_tube_battery
Electronic oscillator circuit
higher frequency selectivity) than can be reliably achieved with discrete capacitors (C) and inductors (L), which suffer from parasitic resistance (R). Once
Crystal_oscillator
Small engine ignition system
Capacitor discharge ignition (CDI) or thyristor ignition is a type of automotive electronic ignition system which is widely used in outboard motors, motorcycles
Capacitor_discharge_ignition
Electronic circuit element implementing a filter
A switched capacitor (SC) is an electronic circuit that implements a function by moving charges into and out of capacitors when electronic switches are
Switched_capacitor
LC oscillator design
using vacuum tubes, is one of a number of designs for LC oscillators, electronic oscillators that use a combination of inductors (L) and capacitors (C)
Colpitts_oscillator
circuit. In an Clapp oscillator, the tuning capacitor is in series to the inductance. The variable capacitor C2 controls the coupling between the tube and
Seiler_oscillator
Type of diode
reverse-biased p–n junction. Varactors are used as voltage-controlled capacitors. They are commonly used in voltage-controlled oscillators, parametric
Varicap
Type of capacitor
Aluminium electrolytic capacitors are (usually) polarized electrolytic capacitors whose anode electrode (+) is made of a pure aluminium foil with an etched
Aluminum electrolytic capacitor
Aluminum_electrolytic_capacitor
Tesla valve Wardenclyffe tower World Wireless System Violet ray Vacuum variable capacitor Pioneer in alternating current research Slobodan Ćuk: Ćuk converter
List of Serbian inventors and discoverers
List_of_Serbian_inventors_and_discoverers
Model for magnetic circuits
gyrator–capacitor model is an example of a group of analogies that preserve energy flow across energy domains by making power conjugate pairs of variables in
Gyrator–capacitor_model
measurement. Capacitive: Uses a diaphragm and pressure cavity to create a variable capacitor to detect strain due to applied pressure, capacitance decreasing as
Pressure_measurement
Early electronic digital computing device
capacitor memory, which consisted of a pair of drums, each containing 1600 capacitors that rotated on a common shaft once per second. The capacitors on
Atanasoff–Berry_computer
Electronic circuit used to implement two-state devices
Bloch during World War I. It consisted of two vacuum tube amplifiers cross-coupled by a resistor-capacitor network. They called their circuit a "multivibrator"
Multivibrator
Sound phenomenon
the capacitor[citation needed]. Likewise, variable capacitors using air as a dielectric are vulnerable to vibrations moving the plates. Capacitors using
Microphonics
signal. The capacitor in series with the grid forms a grid-leak detector which allow the grid to cathode to be used as a diode. A high vacuum tube needs
Audion_receiver
Propulsion system creating motion without propellant
engine, Mach-effect or MEGA drives, quantum drive claims, and the quantum vacuum thruster. No reactionless drive has become an accepted propulsion technology
Reactionless_drive
Uses of capacitors in daily life
Capacitors have many uses in electronic and electrical systems. They are so ubiquitous that it is rare that an electrical product does not include at least
Applications_of_capacitors
Device that converts sound into an electrical signal
field; the condenser microphone, which uses the vibrating diaphragm as a capacitor plate; and the contact microphone, which uses a crystal of piezoelectric
Microphone
Type of turbocharging technology
Variable-geometry turbochargers (VGTs), occasionally known as variable-nozzle turbochargers (VNTs), are a type of turbochargers, usually designed to allow
Variable-geometry turbocharger
Variable-geometry_turbocharger
Type of electronic circuit
an inductor (L) and capacitor (C) connected together, which acts as a resonator. Charge flows back and forth between the capacitor's plates through the
Electronic_oscillator
Pressure difference generated in petrol engines
transmissions; variable valve timing, forced induction, diesel engines, et al.) which render manifold vacuum inadequate or unavailable. Electric vacuum pumps are
Manifold_vacuum
Vacuum tube used to display images
inherent to early power supply designs, as they used vacuum tubes. Because the funnel is used as a capacitor, the glass used in the funnel must be an excellent
Cathode_ray_tube
Shortwave radio transmitter station in Malaysia and Singapore
racks One of several types of sender Sender metering Vacuum variable capacitor Water cooled vacuum tube Antenna coupling transformer Modulation transformer
BBC_Far_Eastern_Relay_Station
tiny radio frequency electric currents. A tuned circuit, consisting of a capacitor connected to a coil of wire, which acted as a bandpass filter to select
History_of_radio_receivers
Electronic oscillator
several advantages: The frequency may be adjusted using a single variable capacitor, one side of which can be earthed The output amplitude remains constant
Hartley_oscillator
American radio receiver manufacturer (1921–1956)
vacuum tubes arranged as a tuned RF amplifier, a regenerative detector, and a final audio amplifier. A tuned antenna circuit consisting of a variable
Crosley_Radio_(1921–1956)
Radio receiver with amplifier stages and a detector
the transformer had a variable capacitor connected across it to make a tuned circuit. A variable capacitor (or sometimes a variable coupling coil called
Tuned radio frequency receiver
Tuned_radio_frequency_receiver
American electrotechnical company
Robert C. Sprague in 1926. It was best known for making a large line of capacitors used in a wide variety of electrical and electronic in commercial, industrial
Sprague_Electric
Device that changes direct current (DC) to alternating current (AC)
voltage capacitor until a pre-set threshold voltage is reached. When the threshold (set by way of an airgap or TRIAC) is reached, the capacitor dumps its
Power_inverter
Miniature adjustable component
adjusted by the device's user. Trimmers can be variable resistors (potentiometers), variable capacitors, or trimmable inductors. They are common in precision
Trimmer_(electronics)
DC-to-DC power converter with an output voltage greater than its input voltage
energy storage element: a capacitor, inductor, or the two in combination. To reduce voltage ripple, filters made of capacitors (sometimes in combination
Boost_converter
List of definitions of terms and concepts used in electrical engineering and electronics
which may be series-connected for higher voltages. Or, a vacuum tube. variable capacitor A capacitor whose value can be changed, by rotating a shaft, squeezing
Glossary of electrical and electronics engineering
Glossary_of_electrical_and_electronics_engineering
Theoretical transistor
A nanoscale vacuum-channel transistor (NVCT) is a transistor in which the electron transport medium is a vacuum, much like a vacuum tube. In a traditional
Nanoscale vacuum-channel transistor
Nanoscale_vacuum-channel_transistor
Gas-filled tube, electrical switch, rectifier
rectifier. Thyratrons can handle much greater currents than similar hard-vacuum tubes. Electron multiplication occurs when the gas becomes ionized, producing
Thyratron
Simple radio receiver circuit for AM reception
the coil into the circuit, varying the inductance. Alternatively, a variable capacitor is used to tune the circuit. Some modern crystal sets use a ferrite
Crystal_radio
Electronic device/component that increases the strength of a signal
or valves. The input signal is coupled through capacitor C1 to the base of transistor Q1. The capacitor allows the AC signal to pass, but blocks the DC
Amplifier
Timing of the release of a spark in a combustion engine
manifold. This provides full engine vacuum (and hence, full vacuum advance) at idle. Some vacuum advance units have two vacuum connections, one at each side
Ignition_timing
Machine that converts electrical energy into mechanical energy
motors typically are (essentially) two-phase motors with a phase-shifting capacitor for one phase. They start like induction motors, but when slip rate decreases
Electric_motor
Electronic circuit
combination of an inductor and three capacitors to set the oscillator's frequency. LC oscillators use a transistor (or vacuum tube or other gain element) and
Clapp_oscillator
First successful type of transistor, developed in 1947
technique called 'electrical forming'. Usually this was done by charging a capacitor of a specified value to a specified voltage then discharging it between
Point-contact_transistor
Electronic circuit
and one amplifying element such as a transistor or vacuum tube (although typically a capacitor is present as well). The name is derived from the fact
Blocking_oscillator
Resistance to magnetic flux
reluctance model which does correctly represent energy flows is the gyrator–capacitor model. Magnetic reluctance is a scalar extensive quantity. The unit for
Magnetic_reluctance
Electronic musical instrument
body capacitance, and thus can be treated as the grounded plate of a variable capacitor in an L-C (inductance-capacitance) circuit, which is part of the oscillator
Theremin
Nonlinear two-terminal fundamental circuit element
fundamental electrical components which also comprises the resistor, capacitor and inductor. Chua and Kang later generalized the concept to memristive
Memristor
System designed to maintain a constant voltage
regulators shunt regulators In the past, one or more vacuum tubes were commonly used as the variable resistance. Modern designs like Shakti Servo use one
Voltage_regulator
DC-DC voltage step-down power converter
storage element, usually in combination with a capacitor. To reduce voltage ripple, filters made of capacitors (sometimes in combination with additional inductors)
Buck_converter
Residual periodic variation of voltage
also refer to the pulsed current consumption of non-linear devices like capacitor-input rectifiers. As well as these time-varying phenomena, there is a
Ripple_(electrical)
Closed loop path containing a magnetic flux
An alternative model that correctly models energy flow is the gyrator–capacitor model. The resistance–reluctance model for magnetic circuits is a lumped-element
Magnetic_circuit
Electronic oscillator
the variable capacitor is only 1/40 of the tuning capacity (.002/40 = 50ppm). The stability requirement also implies the variable capacitor may only tune
Vackář_oscillator
Branch of physics and electrical engineering
complex groups as integrated circuits. Passive electronic components are capacitors, inductors, resistors, whilst active components are such as semiconductor
Electronics
Adjusting input/output impedances of an electrical circuit for some purpose
single frequency. This is because the added element will either be a capacitor or an inductor, whose impedance in both cases is frequency dependent,
Impedance_matching
Piece of machine equipment
drive that has multiple operating speeds, while a variable-speed motor drive is continuously variable in speed. If the motor is generating electrical energy
Motor_drive
Passive two-terminal electrical component that stores energy in its magnetic field
represent the initial current I(t0). The dual of the inductor is the capacitor, which stores energy in an electric field rather than a magnetic field
Inductor
Flow of electric charge
but can also flow through semiconductors, insulators, or even through a vacuum as in electron or ion beams. An old name for direct current was galvanic
Electric_current
Type of power rectifier
feeding one alloy transistor and no series input resistor or speed-up capacitor. The family was called SMAL or SMALL, for "selenium matrix alloy logic"
Selenium_rectifier
Linear oscillator circuit using an RC network
transistor, vacuum tube, or op-amp, with some of its output energy fed back into its input through a network of resistors and capacitors, an RC network
RC_oscillator
Array of logic gates that are reprogrammable
regulator Buck Boost Buck–boost Split-pi Ćuk SEPIC Charge pump Switched capacitor Vacuum tubes Standard Acorn tube Audion Beam tetrode Barretter Compactron
Field-programmable_gate_array
Small-scale magnetometer
few mT. The resolution can reach 1 nT with vacuum operation. Emmerich et al. fabricated the variable capacitor array on a single silicon substrate with
MEMS_magnetic_field_sensor
Instrument to measure radio frequency circuits
Central to the dip meter is a high-frequency variable-frequency oscillator with a calibrated tuning capacitor and matching interchangeable coils, as shown
Grid_dip_oscillator
Early radio receiver component
through the crystal detector which is applied to the earphone and bypass capacitor. The crystal conducts current in only one direction, stripping off the
Crystal_detector
Electrical device
(the output has the same polarity as the input). Its use of a series capacitor to couple energy from the input to the output allows the circuit to respond
Single-ended primary-inductor converter
Single-ended_primary-inductor_converter
Device that converts images into electronic signals
capacitors and CMOS sensors based on MOSFET (MOS field-effect transistor) amplifiers. Analog sensors for invisible radiation tend to involve vacuum tubes
Image_sensor
Electrical equipment
switch capacitors sub-cycle is not feasible due to concerns of stored charge, a TCR is used to create a variable inductance to offset the capacitor. A TCSC
Flexible AC transmission system
Flexible_AC_transmission_system
Frequency selection subsystem for various receiver systems
means of mechanically operated ganged variable capacitors. Often, several sections are provided on a tuning capacitor to tune several stages of the receiver
Tuner_(radio)
Computation machine that uses continuously varying data technology
voltages, providing the result at their output jacks. As well, op amps with capacitor feedback are usually included in a setup; they integrate the sum of their
Analog_computer
Device on vehicle
overcome somewhat by using a combined fuel/vacuum booster pump. Some cars, mostly from the 1960s and 1970s, had variable-speed, hydraulically-driven wipers,
Windscreen_wiper
Voltage-regulator tube QT – Cold-cathode trigger tube T – CRT U – Vacuum capacitor XL – Glow modulator tube, flash tube, gas laser Examples: B142 – 400 W
List_of_vacuum_tubes
Single-grid amplifying vacuum tube having three active electrodes
A triode is an electronic amplifying vacuum tube (or thermionic valve in British English) consisting of three electrodes inside an evacuated glass envelope:
Triode
Device for generating microwaves
The cavity magnetron is a high-power vacuum tube used in early radar systems and subsequently in microwave ovens and in linear particle accelerators. A
Cavity_magnetron
Two-terminal electronic component
arsenide and germanium are also used. The obsolete thermionic diode is a vacuum tube with two electrodes, a heated cathode and a plate, in which electrons
Diode
Charge transfer due to contact or sliding
explanation that has appeared in different forms is analogous to charge on a capacitor. If there is a potential difference between two materials due to the difference
Triboelectric_effect
Regulating device used on transmission networks
other passive reactive power devices, such as capacitors and inductors (reactors). They have a variable reactive power output, can change their output
Static synchronous compensator
Static_synchronous_compensator
Type of resistor, usually with three terminals
movement. If only two terminals are used, one end and the wiper, it acts as a variable resistor or rheostat. The measuring instrument called a potentiometer is
Potentiometer
DC linear voltage regulator
output capacitor value ( C OUT {\textstyle C_{\text{OUT}}} ), the equivalent series resistance (ESR) of the output capacitor, the bypass capacitor ( C BYP
Low-dropout_regulator
Diode that emits light from an organic compound
group also first observed direct current (DC) electroluminescence under vacuum on a single pure crystal of anthracene and on anthracene crystals doped
OLED
Technology for constructing integrated circuits
regulator Buck Boost Buck–boost Split-pi Ćuk SEPIC Charge pump Switched capacitor Vacuum tubes Standard Acorn tube Audion Beam tetrode Barretter Compactron
CMOS
Overview of and topical guide to machines
Computing machines Calculator Computer Electronic components Transistor Diode Capacitor Resistor Inductor Telecommunications Telephone system Engines Heat engine:
Outline_of_machines
Solid-state electrically operated switch also used as an amplifier
tunneling current is controlled by a voltage applied to the gate through a capacitor. Nanofluidic transistor, controls the movement of ions through sub-microscopic
Transistor
Type of electrical rectifier with a liquid cathode
between the anode and control grid, connected to an external resistor-capacitor divider circuit. Dr. Uno Lamm conducted pioneering work at ASEA in Sweden
Mercury-arc_valve
Chemical element with atomic number 73 (Ta)
industrial equipment such as reaction vessels and vacuum furnaces. It is used in tantalum capacitors for electronic equipment such as computers. It is
Tantalum
Electronic circuits that utilize digital signals
outputs by passing electrical signals through logical gates, resistors, capacitors, amplifiers, and other electronic components. The field of digital electronics
Digital_electronics
Type of display device
regulator Buck Boost Buck–boost Split-pi Ćuk SEPIC Charge pump Switched capacitor Vacuum tubes Standard Acorn tube Audion Beam tetrode Barretter Compactron
Quantum_dot_display
Type of electrical current converter
converter and buck converter, having one switching device and a mutual capacitor, to couple the energy. Similar to the buck-boost converter with inverting
Ćuk_converter
Japanese computer scientist
ferrite core with a capacitor to generate electrical oscillations whose timing could be controlled. This provided an alternative to the vacuum tube technology
Eiichi_Goto
Instrument for measuring electric charge
instruments such as geiger counters. Vibrating reed electrometers use a variable capacitor formed between a moving electrode (in the form of a vibrating reed)
Electrometer
Portable hand-held electric light
electrical generator (dynamo). Some types use the dynamo to charge a capacitor or battery, while others only light while the dynamo is moving. Others
Flashlight
Overview of and topical guide to electronics
Cycloconverter Transformer Variable frequency transformer Voltage converter Voltage regulator Power applications Automotive applications Capacitor charging applications
Outline_of_electronics
VACUUM VARIABLE-CAPACITOR
VACUUM VARIABLE-CAPACITOR
Boy/Male
Hindi
Valuable.
Girl/Female
Gujarati, Hindu, Indian
Valuable
Girl/Female
Armenian
Valuable.
Boy/Male
Hindu
Amiable
Boy/Male
Australian, Hebrew
Comforter
Boy/Male
Hawaiian
Valuable.
Surname or Lastname
English
English : from the feminine personal name Mirabel, equated in medieval records with Latin mirabilis ‘marvellous’, ‘wonderful’ (in the sense ‘extraordinary’).
Male
Hebrew
Variant spelling of Hebrew Nachuwm, NACHUM means "comfort." In the bible, this is the name of a minor prophet who foretold the fall of Nineveh.
Boy/Male
Hindu, Indian
Will Come
Boy/Male
Arabic, Bengali, Hindu, Indian, Kannada, Marathi, Muslim, Telugu
Valuable
Girl/Female
Latin
Victory.
Boy/Male
Arabic, Indian, Muslim
Valuable
Girl/Female
Assamese, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Telugu
Valuable
Boy/Male
Tamil
Amiable
Boy/Male
Vietnamese
Valuable.
Girl/Female
Indian
Valuable
Boy/Male
Anglo, British, English
Variable
Girl/Female
Tamil
Valuable
Boy/Male
Hebrew
Comfort.
Boy/Male
Hindu, Indian
Valuable
VACUUM VARIABLE-CAPACITOR
VACUUM VARIABLE-CAPACITOR
Girl/Female
Arabic, Muslim
Loans; Blessing
Boy/Male
American, British, Christian, Dutch, English, French, German, Hindu, Indian, Irish, Jamaican, Teutonic
Bearlike; Elf Ruler; Ruler of the Elves
Boy/Male
Tamil
Satyaraj | ஸதà¯à®¯à®¾à®°à®¾à®œ
Truth
Girl/Female
Muslim American Israeli
Exalted. Highest social standing.
Boy/Male
Latin
Deserving of respect.
Boy/Male
Indian, Punjabi, Sikh
Exalted Knowledge
Surname or Lastname
English and Irish
English and Irish : variant of Higgins, resulting from a misdivision of a name such as Tom Higgins.
Boy/Male
Indian, Telugu
Acharya
Female
Japanese
(ã‚ãšã¿) Japanese name AZUMI means "safe residence."
Boy/Male
Hindu
Light
VACUUM VARIABLE-CAPACITOR
VACUUM VARIABLE-CAPACITOR
VACUUM VARIABLE-CAPACITOR
VACUUM VARIABLE-CAPACITOR
VACUUM VARIABLE-CAPACITOR
adv.
In a variable manner.
a.
Having value or worth; possessing qualities which are useful and esteemed; precious; costly; as, a valuable horse; valuable land; a valuable cargo.
n.
The condition of rarefaction, or reduction of pressure below that of the atmosphere, in a vessel, as the condenser of a steam engine, which is nearly exhausted of air or steam, etc.; as, a vacuum of 26 inches of mercury, or 13 pounds per square inch.
pl.
of Vacuum
n.
That which is variable; that which varies, or is subject to change.
a.
Liable to vary; too susceptible of change; mutable; fickle; unsteady; inconstant; as, the affections of men are variable; passions are variable.
a.
Friendly; kindly; sweet; gracious; as, an amiable temper or mood; amiable ideas.
n.
An invariable quantity; a constant.
n.
Arable land; plow land.
v. t.
To represent by parable.
pl.
of Vacuum
a.
Worthy; estimable; deserving esteem; as, a valuable friend; a valuable companion.
a.
Arable; tillable.
n.
Empty space; vacuity; vacuum.
a.
Having the capacity of varying or changing; capable of alternation in any manner; changeable; as, variable winds or seasons; a variable quantity.
n.
A quantity which may increase or decrease; a quantity which admits of an infinite number of values in the same expression; a variable quantity; as, in the equation x2 - y2 = R2, x and y are variables.
n.
A space entirely devoid of matter (called also, by way of distinction, absolute vacuum); hence, in a more general sense, a space, as the interior of a closed vessel, which has been exhausted to a high or the highest degree by an air pump or other artificial means; as, water boils at a reduced temperature in a vacuum.
a.
Invariable.
a.
Liable to undergo a judicial examination; properly coming under the cognizance of a court; as, a cause may be triable before one court which is not triable in another.