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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
Electronic component
A capacitor is a device that stores electrical energy by accumulating electric charges on two closely spaced surfaces that are insulated from each other
Capacitor
Manufacturing styles of an electronic device
Capacitors are divided into two mechanical groups: Fixed-capacitance devices with a constant capacitance and variable capacitors. Variable capacitors
Capacitor_types
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
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
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)
Location identifier for a circuit component
SW: Switch TFT: Thin-film transistor (display) TH: Thermistor VC: Variable capacitor VDR: Voltage-dependent resistor VFD: Vacuum fluorescent display VT:
Reference_designator
Type of adjustable-speed drive
A variable-frequency drive (VFD, or adjustable-frequency drive, adjustable-speed drive, variable-speed drive, AC drive, micro drive, inverter drive, variable
Variable-frequency_drive
Mathematical transformation
convex on a real variable. Specifically, if a real-valued multivariable function is convex on one of its independent real variables, then the Legendre
Legendre_transformation
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
may be varied by loosening or tightening the winding, making it a variable capacitor. The capacitance can also be reduced by shortening the twisted pair
Gimmick_capacitor
Electrical device that converts AC to DC
resistor, shunt capacitor) or LC (series choke, shunt capacitor) sections. Two common filter geometries are known as Pi (capacitor, choke, capacitor) and T (choke
Rectifier
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
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
High-capacity electrochemical capacitor
an ultracapacitor, is a high-capacity capacitor, with a capacitance value much higher than solid-state capacitors but with lower voltage limits. It bridges
Supercapacitor
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
Electrical circuit
R3 = a variable non-inductive resistance, C4 = a variable capacitor, R4 = a non-inductive resistance in parallel with the variable capacitor C4. Schering
Schering_bridge
LC oscillator design
one of the two capacitors. If tuning by variable capacitor is needed, it should be done with a third capacitor connected in parallel to the inductor (or
Colpitts_oscillator
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
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
Audio bug to spy on US embassy in Moscow
set the membrane-post distance; the membrane and the post formed a variable capacitor acting as a condenser microphone and providing amplitude modulation
The_Thing_(listening_device)
Oscillator whose frequency can be tuned over some range
component whose value is adjustable is usually a capacitor, but could be a variable inductor. The variable capacitor is a mechanical device in which the separation
Variable-frequency_oscillator
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
Type of radio antenna consisting of a loop or coil
reception. A variable capacitor connected across the loop forms a resonant circuit that also tunes the receiver's input stage as that capacitor tracks the
Loop_antenna
Linear oscillator circuit using an RC network
frequency range can be covered by a given variable capacitor in an RC oscillator. For example, a variable capacitor that could be varied over a 9:1 capacitance
RC_oscillator
Analog multiplexing technique used in early telephone systems
frequency-locked loop were used. The variable frequency oscillator was implemented with a motor driving a variable capacitor. The Type-42 system first translated
Carrier_telephony
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
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
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
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
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
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
Storage of electricity in the human body
Body capacitance is the physical property of a human body to act as a capacitor. Like any other electrically conductive object, a human body can store
Body_capacitance
Diode that emits light from an organic compound
transistors. These transistors offer stability at low refresh rates, and variable refresh rates, which allows for power saving displays that do not show
OLED
Semiconductor light source
Geiger–Müller tube Wire chamber Neon lamp Adjustable Potentiometer digital Variable capacitor Varicap Passive Connector audio and video electrical power RF Ferrite
Light-emitting_diode
Mechanical device to shift rotational speed
between the shaft of the variable capacitor and the tuning knob of any radio, to allow fine adjustments of the tuning capacitor with smooth movements of
Reduction_drive
Electronic component
amperes). Parasitic capacitance: The nonconducting diode behaves like a capacitor, which can distort and corrupt high-speed signals. Lower capacitance is
Transient-voltage-suppression diode
Transient-voltage-suppression_diode
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
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
Electric converter
A charge pump is a kind of DC-to-DC converter that uses capacitors for energetic charge storage to raise or lower voltage. Charge-pump circuits are capable
Charge_pump
Ratio of active power to apparent power
amount of correction can be adjusted; it behaves like a variable capacitor. Unlike with capacitors, the amount of reactive power furnished is proportional
Power_factor
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
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
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
thyristor-switched capacitor (TSC) is a type of equipment used for compensating reactive power in electrical power systems. It consists of a power capacitor connected
Thyristor-switched_capacitor
Central computer component that executes instructions
increment the PC by four (except in the case of jumps). ISAs that use variable-length instruction words increment the PC by the number of memory words
Central_processing_unit
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
Electric motor driven by an AC electrical input
frequently used in variable torque applications (like blowers, fans, and pumps) and other cases where variable speeds are desired. A capacitor with a relatively
AC_motor
Antenna constructions for different applications
are used on, and must be resonated artificially, usually by attaching a capacitor across their feedpoint. Composite antennas Composite antennas are made
Antenna_types
Electronic component used to measure strain
microoptoelectromechanical systems (MOEMS). Capacitive strain gauges use a variable capacitor to indicate the level of mechanical deformation. Vibrating wire strain
Strain_gauge
Practical physics application
Geiger–Müller tube Wire chamber Neon lamp Adjustable Potentiometer digital Variable capacitor Varicap Passive Connector audio and video electrical power RF Ferrite
Light-emitting_diode_physics
Gas-filled tube, electrical switch, rectifier
higher than the turn-off voltage, the tube exhibits hysteresis and, with a capacitor across it, it can function as a sawtooth oscillator. The voltage on the
Thyratron
Type of MOSFET where the gate is electrically isolated
Shibata and Ohmi provided the initial inspiration and framework to use capacitors for linear computations. These researchers concentrated on the FG circuit
Floating-gate_MOSFET
Four-layer solid-state current-controlling device
Geiger–Müller tube Wire chamber Neon lamp Adjustable Potentiometer digital Variable capacitor Varicap Passive Connector audio and video electrical power RF Ferrite
Silicon_controlled_rectifier
Type of field-effect transistor
n-type source and drain regions. The MOS capacitor structure is the heart of the MOSFET. Consider a MOS capacitor where the silicon base is of p-type. If
MOSFET
Circuit that makes capacitor act like a larger capacitor
A capacitance multiplier is designed to make a capacitor function like a much larger capacitor. This can be achieved in at least two ways. An active circuit
Capacitance_multiplier
Multi-transistor electronics configuration
Geiger–Müller tube Wire chamber Neon lamp Adjustable Potentiometer digital Variable capacitor Varicap Passive Connector audio and video electrical power RF Ferrite
Darlington_transistor
Omnidirectional circular bent dipole antenna
counter the loop's reactance – in practice, this usually consists of a variable capacitor bridging the point corresponding to the gap of a halo. The distribution
Halo_antenna
Small-scale magnetometer
substrate to form a variable capacitor array. Lorentz force generated by the external magnetic field results in the change of capacitor array. The reported
MEMS_magnetic_field_sensor
Device for producing coherent EM waves in the sub-visible spectrum
Geiger–Müller tube Wire chamber Neon lamp Adjustable Potentiometer digital Variable capacitor Varicap Passive Connector audio and video electrical power RF Ferrite
Maser
Array of logic gates that are reprogrammable
Geiger–Müller tube Wire chamber Neon lamp Adjustable Potentiometer digital Variable capacitor Varicap Passive Connector audio and video electrical power RF Ferrite
Field-programmable_gate_array
Highly sensitive semiconductor electronic device
Geiger–Müller tube Wire chamber Neon lamp Adjustable Potentiometer digital Variable capacitor Varicap Passive Connector audio and video electrical power RF Ferrite
Avalanche_photodiode
Vacuum tube which generates high-frequency radio waves
Geiger–Müller tube Wire chamber Neon lamp Adjustable Potentiometer digital Variable capacitor Varicap Passive Connector audio and video electrical power RF Ferrite
Gyrotron
Opposition of a circuit to a current when a voltage is applied
V_{p}e^{j\omega t}} and thus, as previously, Z capacitor = v C ( t ) i C ( t ) = 1 j ω C . {\displaystyle Z_{\text{capacitor}}={\frac {v_{\text{C}}{\mathord
Electrical_impedance
Microchip manipulating light instead of electricity
Geiger–Müller tube Wire chamber Neon lamp Adjustable Potentiometer digital Variable capacitor Varicap Passive Connector audio and video electrical power RF Ferrite
Photonic_integrated_circuit
Electronic component
Geiger–Müller tube Wire chamber Neon lamp Adjustable Potentiometer digital Variable capacitor Varicap Passive Connector audio and video electrical power RF Ferrite
Resettable_fuse
Type of DC-to-DC converter
state, the capacitor supplies energy to the output load. while in the Off-state, the inductor is connected to the output load and capacitor, so energy
Buck–boost_converter
Spiral that surrounds equal area per turn
growth and the shapes of certain spiral galaxies, and the design of variable capacitors, solar power reflector arrays, and cyclotrons. The representation
Fermat's_spiral
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
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
Power amplifier
on or off. The isolated gate-electrode of the MOSFET forms a capacitor (gate capacitor), which must be charged or discharged each time the MOSFET is
Gate_driver
Resistor Inductor Capacitor Circuit
electrical circuit consisting of a resistor (R), an inductor (L), and a capacitor (C), connected in series or in parallel. The name of the circuit is derived
RLC_circuit
Geiger–Müller tube Wire chamber Neon lamp Adjustable Potentiometer digital Variable capacitor Varicap Passive Connector audio and video electrical power RF Ferrite
List_of_RF_connector_types
Technology for constructing integrated circuits
Geiger–Müller tube Wire chamber Neon lamp Adjustable Potentiometer digital Variable capacitor Varicap Passive Connector audio and video electrical power RF Ferrite
CMOS
Magnetic core on which the windings of electric transformers and inductors are formed
Geiger–Müller tube Wire chamber Neon lamp Adjustable Potentiometer digital Variable capacitor Varicap Passive Connector audio and video electrical power RF Ferrite
Ferrite_core
Clock type
quartz watches – even many of the cheaper ones. A trimmer condenser or variable capacitor changes the frequency coming from the quartz crystal oscillator when
Quartz_clock
Devices that measure magnetic field strength using the Hall effect
Geiger–Müller tube Wire chamber Neon lamp Adjustable Potentiometer digital Variable capacitor Varicap Passive Connector audio and video electrical power RF Ferrite
Hall_effect_sensor
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
Type of magnetometer
Geiger–Müller tube Wire chamber Neon lamp Adjustable Potentiometer digital Variable capacitor Varicap Passive Connector audio and video electrical power RF Ferrite
SQUID
of the variable capacitor (or 'tuning condenser') market in the early days of radio broadcasting. Founded in 1923 to provide tuning capacitors for the
Jackson_Brothers
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)
Diode that allows current to flow in the reverse direction at a specific voltage
Zener diodes are manufactured with a variety of Zener voltages, including variable devices. Some types have an abrupt, heavily doped p–n junction with a low
Zener_diode
Extremely sensitive solid-state photodetector
Geiger–Müller tube Wire chamber Neon lamp Adjustable Potentiometer digital Variable capacitor Varicap Passive Connector audio and video electrical power RF Ferrite
Silicon_photomultiplier
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
Transistor using different semiconductor materials
Geiger–Müller tube Wire chamber Neon lamp Adjustable Potentiometer digital Variable capacitor Varicap Passive Connector audio and video electrical power RF Ferrite
Heterojunction bipolar transistor
Heterojunction_bipolar_transistor
Device for generating microwaves
not the core, of the conductor, the parallel sides of the slot act as a capacitor while the round holes form an inductor: an LC circuit made of solid copper
Cavity_magnetron
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
Early form of computer memory
Atanasoff–Berry computer – Used a type of memory called regenerative capacitor memory Mellon optical memory Notes Kilburn, Tom (1990), "From Cathode
Williams_tube
Type of field-effect transistor
Geiger–Müller tube Wire chamber Neon lamp Adjustable Potentiometer digital Variable capacitor Varicap Passive Connector audio and video electrical power RF Ferrite
High-electron-mobility transistor
High-electron-mobility_transistor
Light dependent resistor
Geiger–Müller tube Wire chamber Neon lamp Adjustable Potentiometer digital Variable capacitor Varicap Passive Connector audio and video electrical power RF Ferrite
Photoresistor
Vacuum tube used to display images
the voltage increases alongside its speed. A capacitor (Retrace Timing Capacitor) or series of capacitors (to provide redundancy) is used to slow the collapse
Cathode_ray_tube
Electronic numeric display device
Geiger–Müller tube Wire chamber Neon lamp Adjustable Potentiometer digital Variable capacitor Varicap Passive Connector audio and video electrical power RF Ferrite
Nixie_tube
Electrical component that can break an electrical circuit
electromagnetic interference if not suppressed; a snubber network of a resistor and capacitor in series will quell the spark. When turned on, an incandescent lamp draws
Switch
Electrical connector designed to work at radio frequencies
Geiger–Müller tube Wire chamber Neon lamp Adjustable Potentiometer digital Variable capacitor Varicap Passive Connector audio and video electrical power RF Ferrite
RF_connector
Two-terminal electronic component
spacecraft. Varicap or varactor diodes These are used as voltage-controlled capacitors. These are important in PLL (phase-locked loop) and FLL (frequency-locked
Diode
Type of variable active electronic filter
controlled state variable filter. Further, switched capacitors can be used to replace resistors in a state variable filter (see Switched capacitor#Filters).
State_variable_filter
Audio oscillator made by Hewlett-Packard
2268872, Hewlett, William R., "Variable Frequency Oscillation Generator", published 11 July 1939, issued 6 January 1942 "Variable Frequency Oscillation Generator
HP_200A
Type of solid state switch
supplies in high-power applications: variable-frequency drives (VFDs) for motor control in trains, electric cars, variable-speed refrigerators and air conditioners
Insulated-gate bipolar transistor
Insulated-gate_bipolar_transistor
Electronic circuit
Although the Clapp circuit is used as a variable frequency oscillator (VFO) by making C0 a variable capacitor, Vackář states that the Clapp oscillator
Clapp_oscillator
VARIABLE CAPACITOR
VARIABLE CAPACITOR
Boy/Male
Arabic, Indian, Muslim
Valuable
Male
Dutch
, amiable.
Boy/Male
Anglo, British, English
Variable
Girl/Female
Gujarati, Hindu, Indian
Valuable
Boy/Male
Hindi
Valuable.
Boy/Male
Hindu, Indian
Valuable
Girl/Female
Christian & English(British/American/Australian)
Amiable
Boy/Male
Hawaiian
Valuable.
Girl/Female
Indian
Valuable
Girl/Female
Assamese, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Telugu
Valuable
Boy/Male
Hindu
Amiable
Boy/Male
Arabic, Bengali, Hindu, Indian, Kannada, Marathi, Muslim, Telugu
Valuable
Girl/Female
Armenian
Valuable.
Boy/Male
Vietnamese
Valuable.
Girl/Female
Tamil
Valuable
Male
Danish
, amiable.
Boy/Male
Greek
Amiable.
Surname or Lastname
English
English : from the feminine personal name Mirabel, equated in medieval records with Latin mirabilis ‘marvellous’, ‘wonderful’ (in the sense ‘extraordinary’).
Boy/Male
Tamil
Amiable
Male
Danish
, amiable.
VARIABLE CAPACITOR
VARIABLE CAPACITOR
Girl/Female
Tamil
Truth
Surname or Lastname
English
English : from Old French cof(f)re ‘chest’, ‘box’, applied as a metonymic occupational name for a maker of coffers or chests or, by extension, for a treasurer.Probably an Americanized spelling of German Kaufer or Kauffer (see Kaufer).
Girl/Female
Tamil
Great, Worthy, Fortunate
Surname or Lastname
English
English : habitational name from any of various places, for example in Hampshire, Surrey, Worcestershire, and West Yorkshire, so called from Old English hǣð ‘heathland’, ‘heather’ + lēah ‘wood’, ‘clearing’.English : variant spelling of Hedley.
Boy/Male
Hindu, Indian, Punjabi, Sikh
Young One
Boy/Male
Gujarati, Hindu, Indian, Kannada, Marathi, Sanskrit, Telugu
Son; Inheritor
Boy/Male
Arabic
Lighting
Boy/Male
Arabic, Gujarati, Hindu, Indian, Kannada, Marathi, Muslim, Oriya, Punjabi, Sikh
The Sky
Girl/Female
Indian
Pure
Female
English
English name derived from the tree name, CEDAR means simply "cedar."
VARIABLE CAPACITOR
VARIABLE CAPACITOR
VARIABLE CAPACITOR
VARIABLE CAPACITOR
VARIABLE CAPACITOR
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.
An invariable quantity; a constant.
a.
Possessing sweetness of disposition; having sweetness of temper, kind-heartedness, etc., which causes one to be liked; as, an amiable woman.
adv.
In a variable manner.
n.
A shifting wind, or one that varies in force.
a.
Friendly; kindly; sweet; gracious; as, an amiable temper or mood; amiable ideas.
a.
Arable; tillable.
v. t.
To represent by parable.
a.
Liable to vary; too susceptible of change; mutable; fickle; unsteady; inconstant; as, the affections of men are variable; passions are variable.
n.
Those parts of the sea where a steady wind is not expected, especially the parts between the trade-wind belts.
n.
That which is variable; that which varies, or is subject to change.
n.
Arable land; plow land.
a.
Worthy; estimable; deserving esteem; as, a valuable friend; a valuable companion.
a.
Having value or worth; possessing qualities which are useful and esteemed; precious; costly; as, a valuable horse; valuable land; a valuable cargo.
a.
Having the capacity of varying or changing; capable of alternation in any manner; changeable; as, variable winds or seasons; a variable quantity.
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.
a.
Changeable; uncertain; inconstant; variable.
a.
Invariable.
a.
Like the moon; variable.
n.
Flowing; unstable; inconstant; variable.