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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
Time between start and end of a pulse
The pulse width is a measure of the elapsed time between the leading and trailing edges of a single pulse of energy. The measure is typically used with
Pulse_width
Electronic circuit or test equipment
A pulse generator is a device that produces controlled bursts of energy characterized by attributes such as duration (commonly known as pulse width),
Pulse_generator
signal. The pulse width ( τ {\displaystyle \tau } ) (or pulse duration) of the transmitted signal is the time, typically in microseconds, each pulse lasts.
Radar_signal_characteristics
Periodic rectangular waveform
onto a pulse wave by varying parameters like amplitude (pulse-amplitude modulation - PAM), width (pulse-width modulation - PWM), position (pulse-position
Pulse_wave
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
Integrated circuit used for timer applications
diode and lamp flashers, pulse generation, pulse-width modulation (PWM), logic clocks, tone generation, security alarms, pulse-position modulation, etc
555_timer_IC
Activity fraction of a periodic system
{\displaystyle D} is the duty cycle, P W {\displaystyle PW} is the pulse width (pulse active time), and T {\displaystyle T} is the total period of the signal
Duty_cycle
Number of pulses of a repeating signal
of 300 or 500 pulses per second. A related measure is the pulse width, the amount of time the transmitter is turned on during each pulse. After producing
Pulse-repetition_frequency
Represents an analog signal using only two levels
Unlike PWM, in which the width of square pulses is varied at a constant frequency, PFM fixes the width of square pulses while varying the frequency. In other
Pulse-frequency_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
Adoption of digital audio technology in the computer industry
Stuart, who wrote software to modulate the duration of and between pulses (pulse-width modulation or "PWM", via a process now often referred to as "bit
Digital_sound_revolution
Internal loudspeaker built into some (older) IBM PC-compatible computers
operating systems or games, could play pulse-code modulation (PCM) sound through the PC speaker using special Pulse-width Modulation techniques explained later
PC_speaker
Device storing number of times an event or process occurred
the pulse ends, the counter stops counting and the accumulated count indicates the measured pulse width in units of clock periods. The pulse width is C
Counter_(digital)
Digital representation of sampled analog signals
methods, pulse-width modulation and pulse-position modulation, in which the information to be encoded is represented by discrete signal pulses of varying
Pulse-code_modulation
Audio amplifier based on switching
between the supply rails, using pulse-width modulation, pulse-density modulation, or related techniques to produce a pulse train output. A low-pass filter
Class-D_amplifier
Management of the rotational speed of a computer fan
pulses twice for each revolution of the fan as a pulse train, with the signal frequency proportional to the fan speed Control input – a pulse-width modulation
Computer_fan_control
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
Form of signal modulation using time shifts
alongside pulse-code modulation and pulse-width modulation. In the early 1960s, Don Mathers and Doug Spreng of NASA invented pulse-position modulation used in
Pulse-position_modulation
Any laser not classified as continuous-wave
pulse cannot be narrower than the reciprocal of the pulse width. In the case of extremely short pulses, that implies lasing over a considerable bandwidth
Pulsed_laser
Protocol for sending vehicle sensor data
fixed-width low signal, followed by a variable-length high period. The low pulse-width is 5 (or more) ticks in length, while the high pulse-width can vary
SENT_(protocol)
Device that changes direct current (DC) to alternating current (AC)
pulse width, the harmonic spectrum can be changed. The lowest THD for a three-step modified sine wave is 30% when the pulses are at 130 degrees width
Power_inverter
Method of sound synthesis
oscillators are used: Pulse-width modulation is applied to both waveforms to create a more complex tone with vibrato: The pulse-width modulated sounds are
Subtractive_synthesis
Classification of power amplifier
fraction of the time that the device is conducting may be adjusted so a pulse-width modulation output (or other frequency based modulation) can be obtained
Power_amplifier_classes
Electromechanical device
techniques namely: Pulse-width modulation Frequency modulation Variable frequency, variable pulse width CLC control In pulse-width modulation the switches
Chopper_(electronics)
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
Technology of power electronics
Common modulation techniques include the carrier-based technique, or Pulse-width modulation, space-vector technique, and the selective-harmonic technique
Power_electronics
Pulsar in the constellation Vulpecula
PSR B1919+21 is a pulsar with a period of 1.3373 seconds and a pulse width of 0.04 seconds. Discovered by Jocelyn Bell Burnell on 28 November 1967, it
PSR_B1919+21
Incoherent light source
brightness at short wavelengths (extending into the ultraviolet) and short pulse widths, flashtubes are also ideally suited as light sources for pumping atoms
Flashtube
Semiconductor light source
Dimming: LEDs can be dimmed either by pulse-width modulation or lowering the forward current. This pulse-width modulation is why LED lights, particularly
Light-emitting_diode
Form of modulation
signal of interest. Pulse-width modulation (PWM) is a special case of PDM where the switching frequency is fixed and all the pulses corresponding to one
Pulse-density_modulation
Technique for driving a multiplexed display
4 switches called Tucoplexing. Charlieplexing can even be used with pulse-width modulation to control the brightness of 12 LEDs with 4 pins. In the following
Charlieplexing
Process of hair removal by exposure to laser pulses
principally in the pulse duration. While lasers may output trains of short pulses to simulate a longer pulse, IPL systems can generate pulse widths up to 250 ms
Laser_hair_removal
Type of adjustable-speed drive
software. VFDs include low- and medium-voltage AC–AC and DC–AC topologies. Pulse-width modulation (PWM) variable-frequency drive projects started in the 1960s
Variable-frequency_drive
AC to DC conversion circuit
The Warsaw rectifier is a pulse-width modulation (PWM) rectifier invented by Włodzimierz Koczara [pl] in 1992. The Warsaw Rectifier provides the following
Warsaw_rectifier
Display that uses the light-modulating properties of liquid crystals
January 12, 2020. Explanation of why pulse width modulated backlighting is used, and its side-effects, "Pulse Width Modulation on LCD monitors" Archived
Liquid-crystal_display
Electric vehicle charging connector in North America
current that is available via the charging station with the help of pulse-width modulation. A 16% PWM is a 10 A maximum, a 25% PWM is a 16 A maximum
SAE_J1772
Technique for amplifying ultrashort laser pulses
a million or more. Finally, the amplified laser pulse is recompressed back to the original pulse width through reversal of the process of stretching, achieving
Chirped_pulse_amplification
Electromechanical device
Consequently, both the pulse width and phase difference will vary over a range of values. For any particular encoder, the pulse width and phase difference
Incremental_encoder
Concept in human perception of sound
transmitter. In Frey's tests, a repetition rate of 50 Hz was used, with pulse width between 10–70 microseconds. The perceived loudness was found to be linked
Microwave_auditory_effect
Range imaging camera system
controlled by a pulse with the same length as the light pulse, where the control signal of switch G2 is delayed by exactly the pulse width. Depending on
Time-of-flight_camera
Regulating device used on transmission networks
commercially available. These devices typically used 3-level topologies and pulse-width modulation (PWM) to simulate voltage waveforms. Modern STATCOMs now make
Static synchronous compensator
Static_synchronous_compensator
Automotive engineering terminology
provide a serial data stream. The protocol communicates at 160 baud with Pulse-width modulation (PWM) signaling and monitors all engine management functions
On-board_diagnostics
2024 smartphone by Apple
a 60 Hz refresh rate and neither are flicker free due to the use of pulse-width modulation for brightness control. iPhone 16 features a more refined
IPhone_16
Way to produce very short laser bursts
Gaussian pulse consistent with this spectral width is around 300 picoseconds; for the 128 THz bandwidth Ti:sapphire laser, this spectral width corresponds
Mode_locking
Therapeutic technique
conductive gel pads. A typical battery-operated TENS unit is able to modulate pulse width, frequency, and intensity. Generally, TENS is applied at high frequency
Transcutaneous electrical nerve stimulation
Transcutaneous_electrical_nerve_stimulation
Electric vehicle charging connector in Europe
and adds a simple, robust, inexpensive and established datalink: LIN pulse width is the same as 5% PWM, so filters do not change. 电动汽车传导充电用连接装置 第 2 部分:交流充电接口
Type_2_connector
Form of signal modulation
systems based upon other common driver modulation techniques such as pulse-width modulation (PWM) as the forward current passing through an LED is relative
Pulse-amplitude_modulation
Entertainment venue in the Las Vegas Valley, United States
Adaptive Loudspeaker for subwoofers, and energy-efficient solutions such as pulse-width modulation and power factor correction. Sphere has approximately 150
Sphere_(venue)
Modulation technique for LED power control
information is encoded - or the power level is set - using pulses that have pseudo-random widths. The pulses are produced so that, on average, the produced signal
Stochastic Signal Density Modulation
Stochastic_Signal_Density_Modulation
Musical synthesizer
outputs: pulse and sloped. The shape control adjusts the pulse width and the contour of the sloped output, with the midpoint setting yielding a 50% pulse width
Korg_MS-10
Radar performance enhancement strategy
transmit pulse. The pulse width of each sample matches the pulse width of the transmit pulse. Enough samples must be taken to act as the input to the pulse-Doppler
Pulse-Doppler signal processing
Pulse-Doppler_signal_processing
Spectroscopic technique
resolution. Beyond the obvious consideration of a sufficiently short pulse width, the dependence of the frequency bandwidth must be accounted for. The
Time-resolved_spectroscopy
Concept in statistics and wave theory
of pulse waveforms and the spectral width of sources used for optical communications and the resolution of spectrometers. The convention of "width" meaning
Full_width_at_half_maximum
Analog synthesizer, manufactured by Korg from 1981 to 1984
which has a Master Tuning feature instead. Only the fixed pulse width and the amount of pulse width modulation are shared settings across all VCOs. The Mono/Poly
Korg_Mono/Poly
Type of computer memory
access cycle before completing the current cycle. Consequently, the CAS pulse width can be shorter and the cycle time decreased dramatically. Lin, Albert
Dynamic_random-access_memory
Printing process
that is printed with only one color of ink, in dots of differing size (pulse-width modulation) or spacing (frequency modulation) or both. This reproduction
Halftone
Electric power transmission system
variants of VSC technology: most installations built until 2012 use pulse-width modulation in a circuit that is effectively an ultra-high-voltage motor
High-voltage_direct_current
Type of solid state switch
turn on and off rapidly, the IGBT can synthesize complex waveforms with pulse-width modulation and low-pass filters, thus it is also used in switching amplifiers
Insulated-gate bipolar transistor
Insulated-gate_bipolar_transistor
Use of light in the visible spectrum as a telecommunication medium
symbols are differentiated by the pulse width, with a wider pulse representing the logical high "1", while narrower pulses representing logical low "0". Because
Visible_light_communication
Laser pulse with duration a picosecond (10^-12 s) or less
pulse propagates is a function of the index of refraction of the medium through which it travels, whereas "Ultrashort" refers to the temporal width of
Ultrashort_pulse
Radar technique
Cycle=\mathrm {PRF} \times Transmit\ Pulse\ Width\\\\Pulse\ Spacing=\left({\frac {c}{\mathrm {PRF} }}\right)\end{cases}}} Pulse-Doppler can reliably resolve true
Range_ambiguity_resolution
Method to control electric motors
keep the measured current components at their reference values. The pulse-width modulation of the variable-frequency drive defines the transistor switching
Field-oriented_control
Internal combustion engine sensor
injection (EFI) engines. Both sensor designs output a 0.0–5.0 volt or a pulse-width modulation (PWM) signal that is proportional to the air mass flow rate
Mass_flow_sensor
Pulse-width modulation rectifier
The Vienna rectifier is a three-phase AC pulse-width modulation rectifier, invented in 1993 by Johann W. Kolar at TU Wien, a public research university
Vienna_rectifier
Electric vehicle charging standard
communication can be differentiated. Basic signaling (BS) is done using a pulse-width modulation (PWM) signal which is transferred over the control pilot (CP)
Combined_Charging_System
Laboratory technique
excitation can be controlled with the pulse width, typically about 3–8 μs for the optimal 90° pulse. The pulse width can be determined by plotting the (signed)
Nuclear magnetic resonance spectroscopy
Nuclear_magnetic_resonance_spectroscopy
Signals broadcast by GPS satellites
PRN code with receiver generated PRN code shifted half a pulse width early and half a pulse width late are used to estimate adjustment required. The amount
GPS_signals
Purposeful modulation of nervous system activity
third a remote control to adjust the stimulus parameters such as pulse width and pulse rate in the PG. Improvements have been made in both the clinical
Neurostimulation
AC to DC power converter
PWM rectifier (pulse-width modulation rectifier) is an AC to DC power converter, that is implemented using forced commutated power electronic semiconductor
PWM_rectifier
Series of microcontrollers
timing related task: timers, counters, proportional pulse width control, pulse width measurement, pulse generation, stepper motor controllers, quadrature
Freescale_683XX
LaserDisc-based read-only memory format
constant angular velocity (CAV) playback, with analog video encoded using pulse-width modulation. However, instead of audio, digital data was stored using
LV-ROM
Type of neutron star with beams of radiation
pulsar "CP 1919" (now known as PSR B1919+21), with a pulse period of 1.337 seconds and a pulse width of 0.04-second, was discovered in 1967. The first binary
Pulsar
Silicon switching diode
400 mA (recurring peak forward current) IFSM = 1 A at 1 s pulse width; 4 A at 1 μs pulse width (non-repetitive peak forward surge current) Electrical and
1N4148_signal_diode
Swedish audio editing software
amount is slowly changed, a pulse-width modulation results. Using this technique, not only can a ramp wave create pulse-width modulation, but any other
Reason_(software)
Device that emits light via optical amplification
pulse cannot be narrower than the reciprocal of the pulse width. In the case of extremely short pulses, that implies lasing over a considerable bandwidth
Laser
Bowens’ transmitter operated at 6 MHz (50 m), had a pulse-repetition rate of 25 Hz, a pulse width of 25 μs, and approached the desired power. In 1935
History_of_radar
Type of voltage converter circuit
{P} }}}\cdot V_{\mathrm {supply} }} where D {\displaystyle D} is the pulse width modulator duty cycle. The forward converter is typically used in off-line
Forward_converter
Electrolysis method
conventional pulse width modulation (PMW), multiple dependent variables can be altered, including the type of waveform, typically a rectangular pulse wave, the
Pulse_electrolysis
Electronic instrument
Some TDRs transmit a pulse along the conductor; the resolution of such instruments is often the width of the pulse. Narrow pulses can offer good resolution
Time-domain_reflectometer
Display technology implementation
they choose a television, as important as the screen size. Using PWM (pulse-width modulation), a technology where the intensity of the LEDs are kept constant
LED-backlit_LCD
Miniature fan used in a computer for active cooling
features of a three-pin connector. The additional pin is used for a pulse-width modulation (PWM) signal to provide variable speed control. These can
Computer_fan
Short-range wireless standard
asynchronous, RZI, UART-like, 3/16 pulse. To save energy, the pulse width is often minimized to 3/16 of a 115.2KBAUD pulse width. 0.576–1.152 Mbit/s (formerly
IrDA
Microcontroller board
on a low value, a rising or falling edge, or a change in value. PWM (pulse-width modulation): pins 3, 5, 6, 9, 10, and 11. Can provide 8-bit PWM output
Arduino_Uno
Visual phenomenon
technologies. Another cause of light modulations may be lamps with unfiltered pulse-width modulation type external dimmers. Whether this is so may be tested with
Stroboscopic_effect
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
Power management integrated circuit
Power_management_integrated_circuit
Ethernet connection signaling mechanism
They are unipolar positive-only electrical pulses of a nominal duration of 100 ns, with a maximum pulse width of 200 ns, generated at a 16 ms time interval
Autonegotiation
Battery or gas-powered model cars or trucks controlled from a distance
control positions with pulse-width modulation. Upgraded radio systems are available that use the more robust frequency modulation and pulse-code modulation.
Radio-controlled_car
Form of illumination used in liquid crystal displays
Douglas Stanton, Martinus Stroomer and Adrianus de Vaan). Using PWM (pulse-width modulation, a technology where the intensity of the LEDs are kept constant
Backlight
Scale model steered using radio control
employed a bidirectional motor with a proportional pulse train that consisted of two tones, pulse-width modulated (TTPW). This system, and another commonly
Radio-controlled_model
Metadata formats for display devices
leading to 3-pixel-thin black bars. Specifying 1368 pixels as the screen width would yield an unnatural screen height of 769.5 pixels. Many Wide XGA panels
Extended Display Identification Data
Extended_Display_Identification_Data
Lamp with a tall stand made of wood or metal
torchère lamps use fluorescent, halogen, or LED light bulbs. Adjusting the pulse-width modulation in the electronic ballast can allow the fluorescent torchères
Torchère
Chemical excitation technique
excited by a strong pulse of light from a pulsed laser of nanosecond, picosecond, or femtosecond pulse width or by another short-pulse light source such
Flash_photolysis
Motor vehicle
position control) and TCC (torque converter clutch) apply, controlled by pulse-width modulation (PWM). On Mazda vehicles, this transmission uses Mazda M5
Ford_4F27E_transmission
Clock for measuring time duration
value. This might be used, for example, to measure events or generate pulse-width modulated waveforms to control the speed of motors (using a class D digital
Timer
Line of synthesizers
tuned continuously from a pure sine wave to a square wave (with variable pulse-width modulation), as well as 63 "spectral" waveforms which are entirely synthetic
Access_Virus
American longwave time signal radio station
using the IRIG "H" format and modulated onto the carrier wave using pulse-width modulation and amplitude-shift keying at one bit per second. A single
WWVB
Fuel injection technology for automotive petrol engines
with individual electrically controlled injectors per cylinder, and pulse-width modulated fuel delivery, the fuel pressure was not modulated by manifold
Jetronic
Pre-World War II British Army anti-aircraft radar
allowed the pulse width to be significantly reduced while offering the same range. The sharpness of the echo is a function of the pulse width, so by reducing
Radar, Gun Laying, Mk. I and Mk. II
Radar,_Gun_Laying,_Mk._I_and_Mk._II
Detail of the global positioning system
electronics can measure signal offset to within about one percent of a bit pulse width, 0.01 × 300 , 000 , 000 m / s ( 1.023 × 10 6 / s ) {\displaystyle {\frac
Error analysis for the Global Positioning System
Error_analysis_for_the_Global_Positioning_System
PULSE WIDTH
PULSE WIDTH
Female
Native American
Native American Algonquin name PULES means "pigeon."
Biblical
millet; small pulse
Surname or Lastname
English
English : derivative of the personal name Pell.German (Pullmann) : variant of Puhlmann, itself a variant of Puhl.Jewish (Ashkenazic) : occupational name for a bottle blower, from German Pulle ‘bottle’ + Mann ‘man’.
Girl/Female
Biblical
Millet, small pulse.
Surname or Lastname
German and Jewish (Ashkenazic)
German and Jewish (Ashkenazic) : occupational name for a purser, or for a purse-maker, from an agent derivative of Middle High German seckel, Yiddish zekl ‘purse’, ‘pouch’.English : from Old French seculier ‘secular’, hence a status name for a member of the secular clergy, or a nickname for someone without religious inclination.
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).
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.
Girl/Female
Native American
Pigeon.
Girl/Female
British, English
Pulses
Surname or Lastname
English
English : variant of Girdler.German (Gürtler) : occupational name for a maker of straps and belts, from Middle High German gurtel ‘belt’ (specifically a leather belt with brass fittings, from which a purse would be hung).
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.
PULSE WIDTH
PULSE WIDTH
Female
Chinese
intellectual.
Girl/Female
British, Christian, Hindu, Indian, Portuguese, Spanish
Victory
Girl/Female
Hindu, Indian, Marathi, Sanskrit
Saffron; Yellow Jasmine
Boy/Male
Hindu
The Moon
Boy/Male
Gujarati, Hindu, Indian, Kannada
An Ancient King
Girl/Female
Tamil
Gatrika | கதà¯à®°à®¿à®•à®¾
Song
Male
Arthurian
, the name of a king.
Girl/Female
Arabic, Muslim
Rich; Beloved One; Precious Gift
Male
English
Roman Latin name VICTOR means "conqueror."Â
Girl/Female
Arabic, Muslim
Princess of Paradise; Angel of Paradise
PULSE WIDTH
PULSE WIDTH
PULSE WIDTH
PULSE WIDTH
PULSE WIDTH
a.
Of, pertaining to, or showing, monocrotism; as, a monocrotic pulse; a pulse of the monocrotic type.
a.
Exciting the pulse; causing pulsation.
n.
Regularly of the pulse.
v. t.
To put into a purse.
n.
Hence, a treasury; finances; as, the public purse.
n.
A purse or bag in which to carry or measure diamonds, etc.
n.
A purse or purse net.
p. pr. & vb. n.
of 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.
a.
Pertaining to pulse; consisting of pulse.
n.
Pulse; pease.
n.
One who collects pods or pulse.
a.
Of or pertaining to the pulse.
v. i.
To beat, as the arteries; to move in pulses or beats; to pulsate; to throb.
a.
Of or pertaining to polycrotism; manifesting polycrotism; as, a polycrotic pulse; a polycrotic pulse curve.
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.
Excessive dicrotic; as, a hyperdicrotic pulse.
n.
Split pulse, esp. of Cajanus Indicus.
v. t.
To draw up or contract into folds or wrinkles, like the mouth of a purse; to pucker; to knit.
a.
Affected with purse pride; puffed up with the possession of riches.