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Represents an analog signal using only two levels
Pulse-frequency modulation (PFM) is a modulation method for representing an analog signal using only two levels (1 and 0). It is analogous to pulse-width
Pulse-frequency_modulation
Process of varying one or more properties of a periodic waveform
methods Pulse-amplitude modulation (PAM) Pulse-width modulation (PWM) and pulse-depth modulation (PDM) Pulse-frequency modulation (PFM) Pulse-position
Signal_modulation
Representation of a signal as a rectangular wave with varying duty cycle
Pulse-width modulation (PWM), also known as pulse-duration modulation (PDM) or pulse-length modulation (PLM), is any method of representing a signal as
Pulse-width_modulation
Form of signal modulation
Pulse-amplitude modulation (PAM) is a form of signal modulation in which the message information is encoded in the amplitude of a pulse train interrupting
Pulse-amplitude_modulation
Digital representation of sampled analog signals
Pulse-code modulation (PCM) is a method used to digitally represent analog signals. It is the standard form of digital audio in computers, compact discs
Pulse-code_modulation
Form of signal modulation using time shifts
Pulse-position modulation (PPM) is a form of signal modulation in which M message bits are encoded by transmitting a single pulse in one of 2 M {\displaystyle
Pulse-position_modulation
Nonlinear optical effect of light-matter interaction
will produce a phase shift in the pulse, leading to a change of the pulse's frequency spectrum. Self-phase modulation is an important effect in optical
Self-phase_modulation
Method for converting signals between digital and analog
into a pulse frequency, or pulse density, which can be understood as pulse-density modulation (PDM). A sequence of positive and negative pulses, representing
Delta-sigma_modulation
Form of modulation
Pulse-density modulation (PDM) is a form of modulation used to represent an analog signal with a binary signal. In a PDM signal, specific amplitude values
Pulse-density_modulation
Electronic method of transmitting information with a carrier wave
Frequency modulation (FM) is a signal modulation technique used in electronic communication, originally for transmitting messages with a radio wave. In
Frequency_modulation
Line code used in early magnetic data storage
Modified frequency modulation (MFM) is a run-length limited (RLL) line code used to encode data on most floppy disks and some hard disk drives. It was
Modified_frequency_modulation
Periodic rectangular waveform
Other pulse modulation techniques include Pulse Frequency Modulation (PFM), where the frequency of the pulses is varied, and pulse-density modulation (PDM)
Pulse_wave
Form of sound synthesis
Frequency modulation synthesis (or FM synthesis) is a form of sound synthesis whereby the frequency of a waveform is changed by modulating its frequency
Frequency modulation synthesis
Frequency_modulation_synthesis
Process in electronics and telecommunications
within a certain frequency band and is typically applied after line coding and before modulation. Transmitting a signal at a high modulation rate through
Pulse_shaping
Audio amplifier based on switching
waveform is derived using pulse-width modulation (PWM), pulse-density modulation (sometimes referred to as pulse frequency modulation), sliding mode control
Class-D_amplifier
Laser source with equal intervals of spectral lines
number of mechanisms exist for obtaining an optical frequency comb, including periodic modulation (in amplitude and/or phase) of a continuous-wave laser
Frequency_comb
ITU-T recommendation
encoding, titled Pulse code modulation (PCM) of voice frequencies released for use in 1972. G.711 passes audio signals in the frequency band of 300–3400 Hz
G.711
Electronic method of transmitting information with a carrier wave
bandwidth of which is twice the maximum frequency of the original baseband signal. Single-sideband modulation avoids this bandwidth increase, and the
Single-sideband_modulation
will be pulse modulated and in continuous wave systems, such as Doppler radar, modulation may not be required. Most systems use pulse modulation, with or
Radar_signal_characteristics
Encoding method used on early floppy and hard disk drives
Frequency modulation encoding, or simply FM, is a method of storing data that saw widespread use in early floppy disk drives and hard disk drives. The
Frequency_modulation_encoding
Electrical resonant transformer circuit invented by Nikola Tesla
interface. Two modulation techniques have been used: AM (amplitude modulation of the exciting voltage) and PFM (pulse-frequency modulation). These are mainly
Tesla_coil
Time between start and end of a pulse
function of the peak energy of the pulse, the pulse width, and the pulse repetition frequency. Increasing the pulse width increases the amount of energy
Pulse_width
Signal conversion technique
differential pulse-code modulation (DPCM) where the difference between successive samples is encoded into n-bit data streams. In delta modulation, the transmitted
Delta_modulation
Audio frequencies used for the transmission of speech
basis of the pulse-code modulation system used for the digital PSTN. Per the Nyquist–Shannon sampling theorem, the sampling frequency (8 kHz) must be at least
Voice_frequency
Rate of modulation of a digital signal
or pulses/second. (See Hartley's law). Modulation is used in passband filtered channels such as telephone lines, radio channels and other frequency division
Symbol_rate
Algorithm on pulse-width modulation
Space vector modulation (SVM) is an algorithm for the control of pulse-width modulation (PWM), invented by Gerhard Pfaff, Alois Weschta, and Albert Wick
Space_vector_modulation
2D modulation technique
Orthogonal Time Frequency Space (OTFS) is a 2D modulation technique that transforms the information carried in the Delay-Doppler coordinate system. The
Orthogonal Time Frequency Space
Orthogonal_Time_Frequency_Space
Frequency mixing function in signal processing
In electronics, ring modulation is a signal processing function, an implementation of frequency mixing, in which two signals are combined to yield an output
Ring_modulation
System that converts an analog signal into a digital signal
use sine wave or square wave frequency modulation; others use pulse-frequency modulation. Such ADCs were once the most popular way to show a digital display
Analog-to-digital_converter
Data communications modulation protocol
Frequency-shift keying (FSK) is a frequency modulation scheme in which digital information is encoded on a carrier signal by periodically shifting the
Frequency-shift_keying
Electronic method of transmitting information with a carrier wave
angle modulation, in which either the frequency of the carrier wave is varied, as in frequency modulation, or its phase, as in phase modulation. AM was
Amplitude_modulation
Type of radar system
difference, or phase shift, from pulse to pulse. This causes the reflector to produce Doppler modulation on the reflected signal. Pulse-Doppler radars exploit this
Pulse-Doppler_radar
Type of radar where a known stable frequency continuous wave radio energy is transmitted
with pure CW radar because the pulse rate is high enough that range measurements cannot be done without frequency modulation (FM). This technique turns the
Continuous-wave_radar
Type of continuous-phase frequency-shift keying
In digital modulation, minimum-shift keying (MSK) is a type of continuous-phase frequency-shift keying that was developed in the late 1950s by Collins
Minimum-shift_keying
Electronic circuit or test equipment
known as pulse width), rise and fall time, amplitude, and pulse repetition rate (frequency). They are implemented in various ways, including as elementary
Pulse_generator
Signal processing technique
linear-frequency-modulation waveform. There are other means to modulate the signal. Phase modulation is a commonly used technique; in this case, the pulse is
Pulse_compression
Computer component
co-operating with a backup battery. A PMIC can use pulse-frequency modulation (PFM) and pulse-width modulation (PWM). Wikimedia Commons has media related to
Power management integrated circuit
Power_management_integrated_circuit
Family of digital modulation methods
Another key property is that the modulations are low-frequency/low-bandwidth waveforms compared to the carrier frequency, which is known as the narrowband
Quadrature amplitude modulation
Quadrature_amplitude_modulation
Modulation technique for mitigating EMI of power converters
Random pulse-width modulation (RPWM) is a modulation technique introduced for mitigating electromagnetic interference (EMI) of power converters by spreading
Random_pulse-width_modulation
Fluctuations in the luminance of a light
mains-supply frequency, the driver or ballast technology and type of light regulation technology applied (e.g. pulse-width modulation). If the modulation frequency
Flicker_(light)
Method of encoding digital data on multiple carrier frequencies
telecommunications, orthogonal frequency-division multiplexing (OFDM) is a type of digital transmission used in digital modulation for encoding digital (binary)
Orthogonal frequency-division multiplexing
Orthogonal_frequency-division_multiplexing
Group of video-transmitting modulation modes
efficiently through long distances. In general, video modulation means that a higher frequency carrier wave is modified according to the original video
Video_modulation
Way to produce very short laser bursts
This time corresponds to a frequency exactly equal to the mode spacing of the laser, Δν = 1/τ. The duration of each pulse of light is determined by the
Mode_locking
DC-DC voltage step-down power converter
switching losses [de]. A different control technique known as pulse-frequency modulation can be used to minimize these losses. We still consider that the
Buck_converter
Electronic system for generating any of a range of frequencies
produce the clock pulse train. As a result, TAF-DPS can address the problems of arbitrary-frequency generation and instantaneous-frequency switching effectively
Frequency_synthesizer
Electromagnetic frequencies ranging from 3 kHz to 300 GHz
Electromagnetic spectrum EMF measurement Frequency allocation Frequency modulation (FM) Plastic welding Pulsed electromagnetic field therapy Radio astronomy
Radio_frequency
Means of modulation in music production
Low-frequency oscillation (LFO) is an electronic frequency that is usually below 20 Hz and creates a rhythmic pulse or sweep. This is used to modulate
Low-frequency_oscillation
Type of wave pulse
spectral bandwidth. Bandwidth-limited pulses have a constant phase across all frequencies making up the pulse. Optical pulses of this type can be generated by
Bandwidth-limited_pulse
Technique used to encode voices in telephony
Adaptive differential pulse-code modulation (ADPCM) is a variant of differential pulse-code modulation (DPCM) that varies the size of the quantization
Adaptive differential pulse-code modulation
Adaptive_differential_pulse-code_modulation
Type of adjustable-speed drive
low- and medium-voltage AC–AC and DC–AC topologies. Pulse-width modulation (PWM) variable-frequency drive projects started in the 1960s at Strömberg in
Variable-frequency_drive
Pattern used within a communications system to represent digital data
Modified frequency modulation, Miller encoding and delay encoding Non-return-to-zero (NRZ) Non-return-to-zero, inverted (NRZI) Pulse-position modulation (PPM)
Line_code
Electronic devices that generate electronic signals
often include some sort of modulation function such as amplitude modulation (AM), frequency modulation (FM), or phase modulation (PM) as well as a second
Signal_generator
Object detection system using radio waves
developed a breadboard test unit, operating at 50 cm (600 MHz) and using pulsed modulation which gave successful laboratory results. In January 1931, a writeup
Radar
Radio broadcasting using amplitude modulation
AM broadcasting is radio broadcasting using amplitude modulation (AM) transmissions. It was the first method developed for making audio radio transmissions
AM_broadcasting
Radio modulation design
Galileo and is a square sub-carrier modulation, where a signal is multiplied by a rectangular sub-carrier of frequency f sc {\displaystyle f_{\text{sc}}}
Binary offset carrier modulation
Binary_offset_carrier_modulation
Television that uses analog signals
monochrome signal. Using RF modulation the signal is then modulated onto a very high frequency (VHF) or ultra high frequency (UHF) carrier wave. Each frame
Analog_television
Electromagnetic wave that is not pulsed
radio-frequency oscillations in the transmitting antenna. The signals produced by these spark-gap transmitters consisted of strings of brief pulses of sinusoidal
Continuous_wave
Signal transmitted for test purposes in TV transmitters
reference pulse or Zero pulse is an artificially produced pulse in a professional television receiver imitating no radio frequency case for modulation index
Zero_reference_pulse
Visual phenomenon
mains-supply frequency, the driver or ballast technology and type of light regulation technology applied (e.g. pulse-width modulation). If the modulation frequency
Stroboscopic_effect
Frequency swept signal
inherently lower peak-to-average power ratio (PAPR). Chirp modulation, or linear frequency modulation for digital communication, was patented by Sidney Darlington
Chirp
Use of light in the visible spectrum as a telecommunication medium
dimming-capable modulations have been standardized in IEEE 802.15.7, in which are described three modulation techniques: on–off keying (OOK), variable pulse position
Visible_light_communication
Aspect of the operation of a servo
the servo a PWM (pulse-width modulation) signal, a series of repeating pulses of variable width where either the width of the pulse (most common modern
Servo_control
same frequency range as the normal echolocation call. This dynamic frequency modulation is called the Doppler shift compensation (DSC), and was discovered
Doppler_shift_compensation
Animal perception of low frequency sounds
during the other, leaving the mean discharge rate constant. Such pulse-frequency modulation allows the stimulus analysis to be independent of the peripheral
Perception_of_infrasound
Term used in analog TV broadcasting
called "negative modulation". When there is no modulating signal, the carrier has the full level and when there is a modulating video frequency (VF) signal
Residual_carrier
Disturbance in an electrical circuit due to external sources of radio waves
Electromagnetic interference (EMI), also called radio-frequency interference (RFI) when in the radio frequency spectrum, is a disturbance generated by an external
Electromagnetic_interference
Frequencies or wavelengths that can pass through a filter
SONET/SDH. In passband transmission, digital modulation methods are employed so that only a limited frequency range is used in some bandpass filtered channel
Passband
Solid-state photodetector
events, i.e. pulse frequency modulation (PFM). Pulses can be counted giving an indication of the input signal's optical intensity, while pulses can trigger
Single-photon_avalanche_diode
Phenomenon whereby deviations from a periodic waveform are reinforced by nonlinearity
Modulation instability only happens under certain circumstances. The most important condition is anomalous group velocity dispersion, whereby pulses with
Modulational_instability
Frequency of a chirp pulse
The spectrum of a chirp pulse describes its characteristics in terms of its frequency components. This frequency-domain representation is an alternative
Chirp_spectrum
In telecommunications, equivalent pulse code modulation (PCM) noise is the amount of noise power on a frequency-division multiplexing (FDM) or wire communication
Equivalent pulse code modulation noise
Equivalent_pulse_code_modulation_noise
Modulation technique for LED power control
of the higher frequency components in the SSDM signal on other systems should be analyzed. Pulse-width modulation Pulse-density modulation Electromagnetic
Stochastic Signal Density Modulation
Stochastic_Signal_Density_Modulation
Circuit
Electronics portal Pulse-swallowing counter R. L. Miller (1939). "Fractional Frequency Generators Utilizing Regenerative Modulation". Proceedings of the
Frequency_divider
Effect of a material on light
velocity, which describes the speed at which a pulse or information superimposed on a wave (modulation) propagates. In the accompanying animation, it
Dispersion_(optics)
Line code in which the signal value returns to zero between each pulse
a zero amplitude in pulse-amplitude modulation (PAM), zero phase shift in phase-shift keying (PSK), or mid-frequency in frequency-shift keying (FSK).
Return-to-zero
Multi-user version of OFDM digital modulation
using a "pulsed" high-power carrier. Constant delay, and shorter delay, can be achieved. OFDMA can also be described as a combination of frequency-domain
Orthogonal frequency-division multiple access
Orthogonal_frequency-division_multiple_access
Spectroscopic technique
properties of paramagnetic compounds. Pulsed EPR techniques such as electron spin echo envelope modulation (ESEEM) or pulsed electron nuclear double resonance
Pulsed electron paramagnetic resonance
Pulsed_electron_paramagnetic_resonance
Use of radio waves for communication
by the modulation signal; Frequency modulation (FM) – in an FM transmitter, the frequency of the radio carrier wave is varied by the modulation signal;
Radio
Internal loudspeaker built into some (older) IBM PC-compatible computers
systems or games, could play pulse-code modulation (PCM) sound through the PC speaker using special Pulse-width Modulation techniques explained later in
PC_speaker
Audio signal processing technique
The chirp pulse compression process transforms a long duration frequency-coded pulse into a narrow pulse of greatly increased amplitude. It is a technique
Chirp_compression
Electronic warfare technique
use both pulse timing and Doppler shifting to track targets, so by varying both the frequency and return timing (through amplitude modulation), these can
Range_gate_pull-off
Overview of and topical guide to television broadcasting
interference Amplitude modulation Frequency mixer Frequency modulation Quadrature amplitude modulation Vestigial sideband modulation (VSBF) Differential
Outline of television broadcasting
Outline_of_television_broadcasting
English engineer (1902–1971)
automatic frequency control circuits, digital delay lines and condenser microphones. Reeves recognised the potential that pulse-code modulation had for
Alec_Reeves
Form of radar used to create images of landscapes
But in a chirped radar, this longer pulse also has a frequency shift during the pulse (hence the chirp or frequency shift). When the "chirped" signal is
Synthetic-aperture_radar
Topics referred to by the same term
font description used by the Microsoft Windows operating system Pulse-frequency modulation PFM, a graphic image file format from Netpbm format PFM, the IATA
PFM
Part of electronic warfare
chirped, that is, the frequency of the carrier is varied within the pulse, much like the sound of a cricket chirping. When the pulse reflects off a target
Electronic counter-countermeasure
Electronic_counter-countermeasure
Sound chip that generates audio
creating sound compared to other methods such as frequency modulation synthesis or pulse-code modulation. PSGs are controlled by writing data to dedicated
Programmable_sound_generator
Classification of power amplifier
device is conducting may be adjusted so a pulse-width modulation output (or other frequency based modulation) can be obtained from the stage. Additional
Power_amplifier_classes
All-optical regenerator used in optical communications
Labs proposed and patented the use of self-phase modulation (SPM) for single channel optical pulse reshaping and re-amplification. More recent applications
Mamyshev_2R_regenerator
Measurement of a signal at discrete time intervals
proposed nonlinear function. Digital audio systems typically employ pulse-code modulation (PCM) to encode sound as a series of discrete samples of the electrical
Sampling_(signal_processing)
Technology of power electronics
a constant frequency. Three control methods that are generally accepted are ON/OFF Control, Phase-Angle Control, and Pulse-Width Modulation AC Chopper
Power_electronics
Device that emits light via optical amplification
to emit light with a very narrow frequency spectrum. Temporal coherence can also be used to produce ultrashort pulses of light with a broad spectrum but
Laser
Analog multiplexing technique used in early telephone systems
replace analog frequency-division systems. The Bell System's T1 system carried 24 voice channels over two cable pairs using pulse-code modulation and time-division
Carrier_telephony
Alteration of the original shape of a signal
phase velocity varies with frequency. In a filter, group delay tends to peak near the cut-off frequency, resulting in pulse distortion. When analog long
Distortion
Channel access method used by various radio communication technologies
can be combined with any modulation scheme like (in advanced cases) quadrature amplitude modulation (QAM) or orthogonal frequency-division multiplexing (OFDM)
Code-division_multiple_access
a clock pulse (3-PSK), and (c) a carrier signal that can assume any one of three different frequencies depending on three different modulation signal significant
Ternary_signal
Classification of radio frequency signals
for classifying radio frequency signals. Each type of radio emission is classified according to its bandwidth, method of modulation, nature of the modulating
Types_of_radio_emissions
Topics referred to by the same term
chirps, signals in which the frequency increases / decreases with time Chirping, pulse compression by linear frequency modulation Trash-talk in ice hockey
Chirping
Transmission method of conveying voice, data, image, signal or video
analog signal, using an analog modulation method such as frequency modulation (FM) or amplitude modulation (AM), or no modulation at all. Some textbooks also
Analog_transmission
Electromechanical device
techniques namely: Pulse-width modulation Frequency modulation Variable frequency, variable pulse width CLC control In pulse-width modulation the switches are
Chopper_(electronics)
PULSE FREQUENCY-MODULATION
PULSE FREQUENCY-MODULATION
Girl/Female
Muslim
One who remembers God frequently
Surname or Lastname
English (Dorset)
English (Dorset) : unexplained. This name is frequent in Nova Scotia.
Girl/Female
Biblical
Millet, small pulse.
Surname or Lastname
Dutch and North German (Hülse)
Dutch and North German (Hülse) : topographic name for someone who lived where holly grew, Middle Low German huls, hüls.English (mainly Lancashire) : habitational name from a place in Cheshire, recorded in the mid 13th century in the forms Holes, Holis, and Holys. This probably represents a Middle English plural of Old English holh ‘hollow’, ‘depression’ (see Hole).
Biblical
millet; small pulse
Surname or Lastname
English (frequent in eastern England)
English (frequent in eastern England) : ethnic name from Norman French aleman ‘German’ or alemayne ‘Germany’ (Late Latin Alemannus and Alemannia, from a Germanic tribal name that probably originally meant ‘all the men’). In some cases the surname may be from the region of Normandy known as Allemagne (south of Caen), probably named as a Germanic-speaking enclave in a Celtic area in Roman times. In North America, the form Allman has probably absorbed some cases of cognates from other languages, in particular Spanish Aleman and French Alleman.German (Allmann) : variant of Allemann (see Alleman) or in some cases probably an Americanized form of the same name.
Boy/Male
English American
A name beginning with D, also frequently used as an independent name.
Surname or Lastname
English (most frequent in northern Ireland)
English (most frequent in northern Ireland) : from Middle English fe(i)th ‘belief (especially Christian belief)’, ‘faithfulness’, ‘loyalty’. This may have been a nickname for a trustworthy person, but was more probably bestowed on one who used ‘Faith!’ frequently as a mild oath or exclamation.
Surname or Lastname
English
English : from an agent derivative of Middle English purse (see Purse), hence an occupational name for someone who made or sold purses and bags, or for an official in charge of expenditure.Scottish : Anglicized form of Gaelic Mac an Sparain ‘son of the purse’, traditionally born by purse-bearers to the Lords of the Isles.
Surname or Lastname
English
English : unexplained. Perhaps a variant of Newborn. This name occurs frequently in NC.
Girl/Female
Arabic, Muslim
One who Remembers God Frequently
Girl/Female
Native American
Pigeon.
Surname or Lastname
English (Devon)
English (Devon) : unexplained. This is a frequent name in OH.
Surname or Lastname
Swedish (also frequent in Finland)
Swedish (also frequent in Finland) : ornamental name from an unexplained first element + the suffix -lin or -in, common suffixes of surnames.French (Hélin) : from a pet form of Hélie (see Helie 1).French (Hélin) : from the Germanic personal name Heilin, a short form of any of various compound names with the first element heil (see Heilmann 2).English : variant of Hillian.
Surname or Lastname
English (also frequent in Wales)
English (also frequent in Wales) : patronymic from the personal name Watkin.
Female
Native American
Native American Algonquin name PULES means "pigeon."
Surname or Lastname
English
English : metonymic occupational name for someone who made bags or purses or for an official in charge of expenditure, from Middle English purse (via Old English from Latin bursa).Scottish : variant of Purser.
Boy/Male
English American
Tile layer, or a. An English surname frequently used as a given name.
Girl/Female
Arabic, Muslim
Prolific; Frequently Producing
Girl/Female
British, English
Pulses
PULSE FREQUENCY-MODULATION
PULSE FREQUENCY-MODULATION
Boy/Male
Biblical Hebrew
Ruling; a judgment of malediction.
Surname or Lastname
English (chiefly Yorkshire)
English (chiefly Yorkshire) : variant spelling of Boyce.Americanized spelling of French Bois.
Surname or Lastname
English
English : metronymic from the medieval female personal name Eve.
Male
Celtic
, of the race of Mars.
Girl/Female
Muslim
Dust colored, White
Boy/Male
Hindu
From the heart, Stream
Girl/Female
Anglo, British, English, German
Desired; Longed-for
Boy/Male
Indian, Telugu
God; God of Venkateswara
Girl/Female
Indian, Sanskrit
Offering to God
Boy/Male
Indian, Sanskrit
Full of Vies
PULSE FREQUENCY-MODULATION
PULSE FREQUENCY-MODULATION
PULSE FREQUENCY-MODULATION
PULSE FREQUENCY-MODULATION
PULSE FREQUENCY-MODULATION
n.
Frequency.
n.
Hence, a treasury; finances; as, the public purse.
n.
A sum of money offered as a prize, or collected as a present; as, to win the purse; to make up a purse.
n.
A seaweed of a reddish brown color, which is sometimes eaten, as in Scotland. The true dulse is Sarcophyllis edulis; the common is Rhodymenia. [Written also dillisk.]
a.
Affected with purse pride; puffed up with the possession of riches.
n.
Frequency.
n.
Frequency; abundance.
adv.
At frequent or short intervals; many times; often; repeatedly; commonly.
n.
A purse or purse net.
a.
Pertaining to pulse; consisting of pulse.
pl.
of Frequency
n.
A purse or bag in which to carry or measure diamonds, etc.
n.
The condition of returning frequently; occurrence often repeated; common occurence; as, the frequency of crimes; the frequency of miracles.
n.
Infrequency.
n.
Often to be met with; happening at short intervals; often repeated or occurring; as, frequent visits.
v. t.
To put into a purse.
v. t.
To draw up or contract into folds or wrinkles, like the mouth of a purse; to pucker; to knit.
v. i.
To beat, as the arteries; to move in pulses or beats; to pulsate; to throb.
n.
Pulse; pease.
n.
Regularly of the pulse.