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Oscillator whose frequency can be tuned over some range
A variable frequency oscillator (VFO) in electronics is an oscillator whose frequency can be tuned (i.e., varied) over some range. It is a necessary component
Variable-frequency_oscillator
LC oscillator design
stable operation. Thus, a Colpitts oscillator used as a variable-frequency oscillator (VFO) performs best when a variable inductance is used for tuning, as
Colpitts_oscillator
Oscillator with frequency controlled by a voltage input
A voltage-controlled oscillator (VCO) is an electronic oscillator whose oscillation frequency is controlled by a voltage input. The applied input voltage
Voltage-controlled_oscillator
Oscillator used to change Signal frequency in electronics
local oscillator (LO) refers to an electronic oscillator when used in conjunction with a mixer to change the frequency of a signal. This frequency conversion
Local_oscillator
Electronic circuit
the oscillator's frequency. LC oscillators use a transistor (or vacuum tube or other gain element) and a positive feedback network. The oscillator has
Clapp_oscillator
Electronic oscillator
A Vackář oscillator is a wide range variable frequency oscillator (VFO) which has a near constant output amplitude over its frequency range. It is similar
Vackář_oscillator
Electronic oscillator circuit
crystal oscillator is an electronic oscillator circuit that uses a piezoelectric crystal as a frequency-selective element. The oscillator frequency is often
Crystal_oscillator
Instrument to measure radio frequency circuits
that measures the resonant frequency of nearby unconnected radio frequency tuned circuits. It is a variable-frequency oscillator that circulates a small-amplitude
Grid_dip_oscillator
Electronic oscillator
The Hartley oscillator is an electronic oscillator circuit in which the oscillation frequency is determined by a tuned circuit consisting of capacitors
Hartley_oscillator
Oscillator used in radio receivers
In a radio receiver, a beat frequency oscillator or BFO is a dedicated oscillator used to create an audio frequency signal from Morse code radiotelegraphy
Beat_frequency_oscillator
Frequency to which a carrier wave is shifted during transmission or reception
local oscillator signal in a process called heterodyning, resulting in a signal at the difference or beat frequency. Intermediate frequencies are used
Intermediate_frequency
Linear oscillator circuit using an RC network
Linear electronic oscillator circuits, which generate a sinusoidal output signal, are composed of an amplifier and a frequency selective element, a filter
RC_oscillator
Harmonic oscillator whose parameters oscillate in time
parametric oscillator is a driven harmonic oscillator in which the oscillations are driven by varying some parameters of the system at some frequencies, typically
Parametric_oscillator
Capacitor whose capacitance can be changed
the resonance frequency, e.g. to tune a radio (therefore it is sometimes called a tuning capacitor or tuning condenser), or as a variable reactance, e
Variable_capacitor
Electronic control system
of a variable frequency oscillator and a phase detector in a feedback loop (Figure 1). The oscillator generates a periodic signal Vo with frequency proportional
Phase-locked_loop
Physical system that responds to a restoring force proportional to displacement
harmonic oscillator is described as a damped oscillator. Depending on the friction coefficient, the system can: Oscillate with a frequency lower than
Harmonic_oscillator
Type of electronic circuit
audio frequency oscillator. An audio oscillator produces frequencies in the audio range, 20 Hz to 20 kHz. A radio frequency (RF) oscillator produces signals
Electronic_oscillator
Oscillating dynamical system with nonlinear damping
In the study of dynamical systems, the van der Pol oscillator (named for Dutch physicist Balthasar van der Pol) is a non-conservative, oscillating system
Van_der_Pol_oscillator
Repetitive variation of some measure about a central value
circuit Royer oscillator Vačkář oscillator Wien bridge oscillator Crystal oscillator Laser (oscillation of electromagnetic field with frequency of order 1015 Hz)
Oscillation
Electronic system for generating any of a range of frequencies
synthesizers use stable and accurate reference frequencies, such as those provided by a crystal oscillator. Three types of synthesizer can be distinguished
Frequency_synthesizer
Electric circuit that generates sine waves
bridge oscillator is a type of electronic oscillator that generates sine waves. It can generate a large range of frequencies. The oscillator is based
Wien_bridge_oscillator
1966 single by Napoleon XIV
Recording Studios in New York. Samuels used a variable-frequency oscillator to alter the 60 Hz frequency of the hysteresis motor of a multitrack tape recording
They're Coming to Take Me Away, Ha-Haaa!
They're_Coming_to_Take_Me_Away,_Ha-Haaa!
Parametric oscillator that oscillates at optical frequencies
parametric oscillator (OPO) is a parametric oscillator that oscillates at optical frequencies. It converts an input laser wave (called "pump") with frequency ω
Optical_parametric_oscillator
Radio communication system implemented in software
receiver uses a variable-frequency oscillator (VFO), a mixer, and a filter to tune the desired signal to a common intermediate frequency (IF) or baseband
Software-defined_radio
Analog multiplexing technique used in early telephone systems
frequencies involved (.25 ppm relative accuracy between the two terminals), crystal oscillators with a frequency-locked loop were used. The variable frequency
Carrier_telephony
Electrical circuit
voltage-controlled oscillators (e.g. variable frequency oscillators), voltage-controlled resistors, and voltage-controlled variable gain amplifiers. In
Operational transconductance amplifier
Operational_transconductance_amplifier
Electronic device
one frequency to another frequency, especially in a superheterodyne receiver. See frequency mixer. The circuit usually consists of a local oscillator and
Frequency_changer
Electronic musical instrument
grounded plate of a variable capacitor in an L-C (inductance-capacitance) circuit, which is part of the oscillator and determines its frequency. In the simplest
Theremin
Frequency at which systems tend to oscillate
harmonic oscillators, such as an idealized spring with no energy loss wherein the system exhibits constant-amplitude oscillations with a constant frequency. The
Natural_frequency
Clock type
condenser or variable capacitor changes the frequency coming from the quartz crystal oscillator when its capacitance is changed. The frequency dividers remain
Quartz_clock
Form of sound synthesis
waveform is changed by modulating its frequency with a modulator. The (instantaneous) frequency of an oscillator is altered in accordance with the amplitude
Frequency modulation synthesis
Frequency_modulation_synthesis
Quantum mechanical model
ω = k / m {\textstyle \omega ={\sqrt {k/m}}} is the angular frequency of the oscillator, x ^ {\displaystyle {\hat {x}}} is the position operator (given
Quantum_harmonic_oscillator
the above). Variable-frequency oscillator (VFO) Phase-locked loop frequency synthesiser Direct digital synthesis While modern frequency synthesizers
Radio_transmitter_design
inductance L1 of the LC circuit. In an Clapp oscillator, the tuning capacitor is in series to the inductance. The variable capacitor C2 controls the coupling between
Seiler_oscillator
VFO—Variable-frequency oscillator VFS—Virtual File System VHD—Virtual Hard Disk VG—Volume Group VGA—Video Graphics Array VHF—Very High Frequency VLAN—Virtual
List of computing and IT abbreviations
List_of_computing_and_IT_abbreviations
Radar technology
switching the frequencies back and forth, a composite image of the weather can be built up. Variable-frequency oscillator Frequency hopping Frequency diversity
Frequency_agility
Type of diode
voltage-controlled oscillators, parametric amplifiers, and frequency multipliers. Voltage-controlled oscillators have many applications such as frequency modulation
Varicap
Timing oscillator
Microelectromechanical system oscillators (MEMS oscillators) are devices that generate highly stable reference frequencies used to sequence electronic systems
Microelectromechanical system oscillator
Microelectromechanical_system_oscillator
Type of radio receiver
desired. Transformation of the incoming signal frequency is usually accomplished by a heterodyne oscillator and rectifier." A practical approach was to convert
Superheterodyne_receiver
Signal processing technique
output of a fixed radio frequency oscillator is mixed with that of an oscillator whose frequency is affected by the variable capacitance between the antenna
Heterodyne
Electronic circuit
principle of a relaxation oscillator. The non-sinusoidal output is not suitable for use as a radio-frequency local oscillator, but it can serve as a timing
Blocking_oscillator
Audio oscillator made by Hewlett-Packard
Retrieved 2010-05-10. "The 200B Oscillator and Disney Fantasound - HP History". US 2268872, Hewlett, William R., "Variable Frequency Oscillation Generator", published
HP_200A
in the approach chart of the AD) VDR VHF digital radio VFO Variable-frequency oscillator VFR visual flight rules VG vortex generator VGA Video Graphics
List of aviation, avionics, aerospace and aeronautical abbreviations
List_of_aviation,_avionics,_aerospace_and_aeronautical_abbreviations
Physical characteristic of oscillating systems
modeled as harmonic oscillators near their equilibria, a derivation of the resonant frequency for a driven, damped harmonic oscillator is shown. An RLC circuit
Resonance
Surname list
All pages with titles containing Vackarova Vackář oscillator, wide range variable frequency oscillator This page lists people with the surname Vačkář. If
Vačkář
Electronic method of transmitting information with a carrier wave
of frequency modulation in the frequency domain. As in other modulation systems, the modulation index indicates by how much the modulated variable varies
Frequency_modulation
Topics referred to by the same term
VFO may refer to: Variable-frequency oscillator, an oscillator whose frequency can be tuned over some range Vserossiyskaya Fašistskija Organizatsiya, a
VFO_(disambiguation)
Amateur radio transceiver series
Numerous frequencies can be stored in the radio's memory for rapid return to them, and selecting between the two variable-frequency oscillators allows one
Yaesu_FT-1000MP
Physical phenomenon
the change in variable xt dependent on the variable xt-1 evaluated at an earlier time. Simple mathematical models of self-oscillators involve negative
Self-oscillation
Vacuum tube used to generate microwaves
A backward wave oscillator (BWO), also called carcinotron or backward wave tube, is a vacuum tube that is used to generate microwaves up to the terahertz
Backward-wave_oscillator
Non-linear second order differential equation and its attractor
The Duffing equation (or Duffing oscillator), named after Georg Duffing (1861–1944), is a non-linear second-order differential equation used to model certain
Duffing_equation
Process where information about current status is used to influence future status
games. Oscillators are often characterized by the frequency of their output signal: A low-frequency oscillator (LFO) is an electronic oscillator that generates
Feedback
Medical intervention
ventilation (HFOV), PAW is the primary variable affecting oxygenation and is set independent of other variables on the oscillator. Because distal airway pressure
High-frequency_ventilation
Sundman Transformation and Differential Forms for Linearizing the Variable Frequency Oscillator Equation and the Modified Ivey's Equation". Fudma Journal of
List of nonlinear ordinary differential equations
List_of_nonlinear_ordinary_differential_equations
Physical constant in quantum mechanics
light describe a set of harmonic oscillators, one for each possible frequency. He examined how the entropy of the oscillators varied with the temperature of
Planck_constant
Pseudo-digital circuit
the voltage-controlled oscillator. The control signal impacts the oscillator's frequency, and phase is the integral of frequency, so a second integration
Delay-locked_loop
Meter that displays the frequencies of an electronic signal
unknown radio frequency. In this case the tuning fork is replaced by a small radio transmitter, the local oscillator (LO), tuned to a frequency close to that
Frequency_meter
Sound generating integrated circuit
waveforms by combining the outputs of a low frequency oscillator, variable frequency (voltage-controlled) oscillator (VCO) and noise source, modulating the
Texas_Instruments_SN76477
Signal processing technique in telecommunications
end, for each frequency channel, an electronic oscillator generates a carrier signal, a steady oscillating waveform at a single frequency that serves to
Frequency-division multiplexing
Frequency-division_multiplexing
Network of coupled dynamical systems
network connecting oscillators, where oscillators are nodes that emit a signal with somewhat regular (possibly variable) frequency, and are also capable
Synchronization_network
Property that an increasing voltage results in a decreasing current
same terminals. They are used in electronic oscillators and amplifiers, particularly at microwave frequencies. Most microwave energy is produced with negative
Negative_resistance
Synthesizer introduced in 1997
algorithms. The master and/or slave oscillator within OSC1 can be modulated by the first low-frequency oscillator (LFO1), either jointly or individually
Yamaha_AN1x
Pattern of oscillating motion in a system
the oscillators the frequency of the fundamental vibration of the whole block of solid. He assigned to the remaining oscillators the frequencies of the
Normal_mode
Miniature adjustable component
radio and television receivers, in the intermediate frequency (IF), oscillator and radio frequency (RF) circuits. They are adjusted into the right position
Trimmer_(electronics)
Frequencies in coupled oscillators
coupled oscillators, antiresonance, by analogy with resonance, is a pronounced minimum in the amplitude of an oscillator at a particular frequency, accompanied
Antiresonance
Form of diode
high-frequency electronics. It is based on the "Gunn effect" discovered in 1962 by physicist J. B. Gunn. Its main uses are in electronic oscillators to
Gunn_diode
Discrete probability distribution
mechanics, especially quantum optics. Namely, for a quantum harmonic oscillator system in a coherent state, the probability of measuring a particular
Poisson_distribution
Radio receiver with amplifier stages and a detector
reception frequency. This is in contrast to the modern superheterodyne receiver that must only tune the receiver's RF front end and local oscillator to the
Tuned radio frequency receiver
Tuned_radio_frequency_receiver
Mathematical transform that expresses a function of time as a function of frequency
then frequency has the unit hertz. The transform variable can also be written in terms of angular frequency, ω = 2 π ξ {\displaystyle \omega =2\pi \xi }
Fourier_transform
Laser light source
light of variable wavelengths by an optical parametric amplification process. It is essentially the same as an optical parametric oscillator, but without
Optical_parametric_amplifier
Measure of frequency stability in clocks and oscillators
(AVAR), also known as two-sample variance, is a measure of frequency stability in clocks, oscillators and amplifiers. It is named after David W. Allan and expressed
Allan_variance
Device for generating microwaves
The plates were connected to an oscillator that reversed the relative voltage of the two plates at a given frequency. At any given instant, the electron
Cavity_magnetron
Automatic fuze that detonates an explosive at a predetermined distance
beat frequency which corresponded to the velocity difference. Viewed another way, the received signal frequency was Doppler-shifted from the oscillator frequency
Proximity_fuze
Resistor Inductor Capacitor Circuit
many applications as oscillator circuits. Radio receivers and television sets use them for tuning to select a narrow frequency range from ambient radio
RLC_circuit
Spectral density of light emitted by a black body
magnitude, with several such oscillators at each of finitely many characteristic frequencies. These hypothetical oscillators were for Planck purely imaginary
Planck's_law
Storage of electricity in the human body
exploited in the theremin to shift the frequency of the musical instrument's internal oscillators (one oscillator controls pitch and the other controls
Body_capacitance
consists of two modules – a dual low-frequency oscillator and the triple delay-line oscillator. The low-frequency oscillator puts out 0.6 Hz and 6 Hz mixed
Logan_String_Melody
Representation of a signal as a rectangular wave with varying duty cycle
secondarily modulated with a low-frequency oscillator. This gives a sound effect similar to chorus or slightly detuned oscillators played together. (In fact
Pulse-width_modulation
Discrete device in an electronic system
capacitor Vacuum capacitor Variable capacitor – adjustable capacitance Tuning capacitor – variable capacitor for tuning a radio, oscillator, or tuned circuit Trimmer
Electronic_component
Probability distribution
X {\textstyle e^{itX}} , as a function of the real variable t {\displaystyle t} (the frequency parameter of the Fourier transform). This definition
Normal_distribution
American physicist (born 1925)
Complex Symmetric Matrices, and Physically Realizable Systems. Variable-frequency Oscillator Circuits Possessing Exceptional Stability (1951) Determination
Gordon_Eugene_Martin
network. The two variable frequency oscillators track each other at frequencies 100 kHz apart. The output of a 0.5-250 MHz oscillator, F1, is fed into
RX_meter
Variable bandwidth variant of Allan variance
mod σy2(τ), is a variable bandwidth modified variant of Allan variance, a measurement of frequency stability in clocks, oscillators and amplifiers. Its
Modified_Allan_variance
Type of laser
frequency is in most cases around 70 to 90 MHz, as given by the oscillator's round-trip optical path, typically a few meters. Ti:sapphire oscillators
Titanium-sapphire_laser
Vacuum tube used for amplifying radio waves
an amplifier for high radio frequencies, from UHF up into the microwave range. Low-power klystrons are used as oscillators in terrestrial microwave relay
Klystron
Electronic filter circuit controlled with voltage
from signal sources, including oscillators and noise, or the output of other processors. By varying the cutoff frequency, the filter passes or attenuates
Voltage-controlled_filter
High-frequency AC generator for radio transmission
developed by Ernst Alexanderson beginning in 1904, for the generation of high-frequency alternating current for use as a radio transmitter. It was one of the
Alexanderson_alternator
Definitions of terms used in amateur radio
UHF (Ultra High Frequency) The band of frequencies between 300 MHz and 1300 MHz. VFO Variable Frequency Oscillator, a type of oscillator that can be tuned
Glossary_of_amateur_radio
electron-hole (p-n) plasmas. Electronic oscillator Larrabee R.D., Steel M.C. "Oscillistor — New type of semiconductor oscillator", J. Appl. Phys. v.31, N.9 p.1519–1523
Oscillistor
Device which uses electromagnetic induction to sense objects
amplifier, this forms a tuned frequency oscillator. When power is applied, the resulting oscillation is a high frequency alternating electric current in
Inductive_sensor
Acoustic sensing method
iceberg at a 2-mile (3.2 km) range. The "Fessenden oscillator", operated at about 500 Hz frequency, was unable to determine the bearing of the iceberg
Sonar
Equipment used in induction heating
batch process line. Due to its flexibility and potential frequency range, the valve oscillator based induction heater was until recent years widely used
Induction_heater
Pictogram used to represent various electrical and electronic devices or functions
3-pin voltage regulator Frequency text should be placed next to each oscillator symbol, such as "16MHz". Crystal oscillator (IEEE‑style) Ceramic resonator
Electronic_symbol
Frequency mixing function in signal processing
modulated. Oscillator 1 gets modulated by oscillator 3's frequency, oscillator 2 by oscillator 1's frequency, and oscillator 3 by oscillator 2's frequency. Ring
Ring_modulation
American physicist and electrical engineer
connected to a variable-frequency electronic oscillator would vibrate strongly at a very specific frequency, but that at other frequencies it would not
Walter_Guyton_Cady
Device that changes direct current (DC) to alternating current (AC)
output frequency of a power inverter device is usually the same as standard power line frequency, 50 or 60 hertz. Exceptions include variable frequency motor
Power_inverter
Concept relating to waves and signals
continuous variable (such as strain or pressure) as a function of time and/or space. Discrete spectra are also produced by some non-linear oscillators where
Spectrum_(physical_sciences)
Continuous (non-quantized) quantities in quantum information science
quantum harmonic oscillator with its associated creation and annihilation operators, one defines a canonically conjugate pair of variables for each mode
Continuous-variable quantum information
Continuous-variable_quantum_information
3–30 kHz range of the electromagnetic spectrum
receiver and transmitter must have their frequency locked to a stable reference such as a GPS disciplined oscillator or a rubidium standard in order to support
Very_low_frequency
Study of oscillations in stars
with the behaviour of simple harmonic oscillators, this implies that oscillating solutions exist when the frequency is either greater or less than both
Asteroseismology
VARIABLE FREQUENCY-OSCILLATOR
VARIABLE FREQUENCY-OSCILLATOR
Boy/Male
Vietnamese
Valuable.
Girl/Female
Gujarati, Hindu, Indian
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’).
Surname or Lastname
English (also frequent in Wales)
English (also frequent in Wales) : patronymic from the personal name Watkin.
Girl/Female
Armenian
Valuable.
Girl/Female
Christian & English(British/American/Australian)
Amiable
Girl/Female
Assamese, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Telugu
Valuable
Boy/Male
Greek
Amiable.
Boy/Male
Hawaiian
Valuable.
Boy/Male
Anglo, British, English
Variable
Boy/Male
Arabic, Bengali, Hindu, Indian, Kannada, Marathi, Muslim, Telugu
Valuable
Girl/Female
Tamil
Valuable
Boy/Male
Hindu, Indian
Valuable
Male
Danish
, amiable.
Boy/Male
Tamil
Amiable
Boy/Male
Arabic, Indian, Muslim
Valuable
Male
Danish
, amiable.
Girl/Female
Indian
Valuable
Boy/Male
Hindu
Amiable
Boy/Male
Hindi
Valuable.
VARIABLE FREQUENCY-OSCILLATOR
VARIABLE FREQUENCY-OSCILLATOR
Male
Spanish
Spanish pet form of Portuguese/Spanish Gregorio, GOYO means "watchful; vigilant."
Boy/Male
Spanish
Boy.
Girl/Female
Hindu
The God of intelligence a light
Girl/Female
American, Arabic, Assamese, Bengali, British, Christian, Danish, Dutch, English, French, German, Greek, Hebrew, Hindu, Indian, Irish, Jamaican, Latin, Marathi, Muslim, Swedish, Telugu
Lily; Form of Lillian; Manuscripts of God; Lily Flower; A Symbol of Purity
Female
French
French form of Roman Latin Flora, FLEUR means "flower." The English word "Flower" is also occasionally used as a personal name.
Girl/Female
Gujarati, Hindu, Indian
Precious Diamond
Surname or Lastname
English (mainly West Midlands)
English (mainly West Midlands) : habitational name from Peyton in Sussex, named the Old English personal name Pǣga + Old English tūn ‘enclosure’, ‘settlement’, or from some other place similarly named. Peyton in Essex has probably not contributed; it has a quite different early etymology, and even in the 16th century it was still Pakenho or Patenhall.Irish (mainly County Donegal) : Anglicized form of Gaelic Ó Peatáin ‘descendant of Peatán’, a pet form of the personal name Pádraig (see Patrick). Outside County Donegal, the name is apparently mainly of English origin (see 1).
Boy/Male
English French Scandinavian
Counselor.
Girl/Female
Hindu, Indian
Loveable Person
Girl/Female
Tamil
Calm
VARIABLE FREQUENCY-OSCILLATOR
VARIABLE FREQUENCY-OSCILLATOR
VARIABLE FREQUENCY-OSCILLATOR
VARIABLE FREQUENCY-OSCILLATOR
VARIABLE FREQUENCY-OSCILLATOR
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.
n.
That which is variable; that which varies, or is subject to change.
n.
Arable land; plow land.
n.
An invariable quantity; a constant.
a.
Worthy; estimable; deserving esteem; as, a valuable friend; a valuable companion.
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.
v. t.
To represent by parable.
a.
Invariable.
n.
The condition of returning frequently; occurrence often repeated; common occurence; as, the frequency of crimes; the frequency of miracles.
a.
Arable; tillable.
n.
Frequency; abundance.
n.
Often to be met with; happening at short intervals; often repeated or occurring; as, frequent visits.
n.
Frequency.
a.
Liable to vary; too susceptible of change; mutable; fickle; unsteady; inconstant; as, the affections of men are variable; passions are variable.
adv.
At frequent or short intervals; many times; often; repeatedly; commonly.
n.
Infrequency.
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.
adv.
In a variable manner.
a.
Friendly; kindly; sweet; gracious; as, an amiable temper or mood; amiable ideas.