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ADG419 数据手册DataSheet下载
ADG419 数据手册DataSheet下载

... Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied. Exposure to abso ...
2016 China International Conference on Electricity Distribution
2016 China International Conference on Electricity Distribution

... power quality, and that it should be paid more attention to. Voltage sag is defined as any voltage drop event between 10% and 90% of the nominal RMS voltage, lasting between 10ms to 1 min. It is always caused by short-circuits on power systems and it is almost impossible to avoid. A number of mitiga ...
A Design Study of Dual-Stator Permanent Magnet Brushless DC Motor
A Design Study of Dual-Stator Permanent Magnet Brushless DC Motor

... Dual-stator permanent magnet brushless DC Motor (DSBLDC) features high efficiency and torque-density. As DSBLDC could operate in various states according to different winding connection modes, it is fully qualified for electric vehicle (EV) drive. Unfortunately, due to the particular dual-stator str ...
High-voltage switch using series-connected
High-voltage switch using series-connected

... The series operation of self turn-off devices is not easy because of the following reasons: • unequal device switching characteristics; • unequal device leakage current; • unequal stray inductance in the series circuit; • unequal gate drive delay. Fig. 2 shows the typical waveforms of two series-con ...
DAC7613 - Texas Instruments
DAC7613 - Texas Instruments

... Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been de ...
AD8112 数据手册DataSheet 下载
AD8112 数据手册DataSheet 下载

DC-motor modelling and parameter identification
DC-motor modelling and parameter identification

... With all measurements available, and the estimated value of k a , we are ready to use (3.2) to estimate the friction coefficient f . However, the simple linear differential equation does not tell the whole truth. Besides the linear velocity dependent friction torque f ω(t ), there is also a static f ...
s-cab_quickstart - the NCE Information Station
s-cab_quickstart - the NCE Information Station

Most Common Errors in Service Entrance and Load Side Install
Most Common Errors in Service Entrance and Load Side Install

Challenges of Dimming LED Loads on ELV and MLV
Challenges of Dimming LED Loads on ELV and MLV

... transformer may begin to saturate due to the imbalance, and/or the light may become visibly unstable. If a dimmer does not create a perfectly symmetrical output, the current imbalances between positive and negative half-cycles can begin to saturate a transformer, especially if it is already operatin ...
The Bootstrapped Switch [A Circuit for All Seasons]
The Bootstrapped Switch [A Circuit for All Seasons]

... [8] H. Wei and B. Razavi, “An 8-bit 4-GS/s 120mW CMOS ADC,” IEEE J. Solid-State Circuits, vol. 349, pp. 1751–1761, Aug. 2014. [9] J. Mathew and B. Razavi, “A 12-bit 200-MS/s 3.4mW CMOS ADC with 0.85-V supply,” in Symp. ...
How to make a sticky surface slippery_APL
How to make a sticky surface slippery_APL

... moment during the AC oscillation cycle. The voltage-dependent values of θ r and θ a can then be determined from eq. ( 2) using the minimum ( f el = 0 ) and maximum ( f el = 2η ) of the electric force, respectively. Hence, we obtain the prediction that θ r is independent of the applied voltage, i.e. ...
USB-OTG full-speed transceiver
USB-OTG full-speed transceiver

... The STOTG04 is a USB On-The-Go full-speed transceiver. It provides complete physical layer (PHY) solution for any USB-OTG device. It contains VBUS charge pump and comparators, ID line detector and interrupt generator, and the USB differential driver and receivers. The STOTG04 transceiver is suitable ...
NAT2XXX Series SIP Non-Isolated Point-of
NAT2XXX Series SIP Non-Isolated Point-of

... 4). The converter’s pre-bias startup is affected by this function. The converter will still be able to start under a pre-bias condition, but the output voltage waveform will have a glitch during startup. Frequency Synchronization When multiple converters are used in a system, it is desirable to have ...
AP7311
AP7311

... Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use o ...
C-Bypass - Siemens
C-Bypass - Siemens

... Control logic short circuit protection 100,000 AIC short circuit rating Country of Origin (COO) USA IBC 2012 Seismic Certified Compact design ...
ADC, FFT and Noise. p. 1  ADC, FFT, and Noise
ADC, FFT and Noise. p. 1 ADC, FFT, and Noise

... takes the fast Fourier transform (FFT) of a specified number samples of the waveform, and (3) displays the Fourier transform on the monitor. For the number of samples always use a number that is a power of 2, i.e. 2n, because the FFT program works much more efficiently on such a sample. ...
clock skew
clock skew

... • The bypass capacitance is distributed across the chip so that a local spike in current can be supplied from nearby bypass capacitance rather than through the resistance of the overall power grid. • power distribution network doesn’t really need to carry all of the peak current. • Much of the diffe ...
Frequently asked questions about phase detectors
Frequently asked questions about phase detectors

... volts per radian. If the peaks of a triangular waveform are +V and -V, the slope is 2V/π volts per radian. If you find that the shape of the waveform is in-between sinusoidal and triangular you can take the average of these results, which is (V + 2V/π) / 2 = 0.82 × V volts per radian. Q. Is the DC p ...
ADR291 数据手册DataSheet 下载
ADR291 数据手册DataSheet 下载

... voltage references that use an XFET® reference circuit. The new XFET architecture offers significant performance improvements over traditional band gap and buried Zener-based references. Improvements include one quarter the voltage noise output of band gap references operating at the same current, v ...
LMC6482 - UTK-EECS
LMC6482 - UTK-EECS

... Human body model, 1.5kΩ in series with 100pF. All pins rated per method 3015.6 of MIL-STD-883. This is a Class 1 device rating. Limiting input pin current is only necessary for input voltages that exceed absolute maximum input voltage ratings. Applies to both single-supply and split-supply operation ...
MID400 AC Line Monitor Logic-Out Device
MID400 AC Line Monitor Logic-Out Device

... (defined as the ratio of the DC output current and the DC input current) is achieved through the use of high gain amplifier. The detector amplifier circuitry operates from a 5V DC supply and drives an open collector transistor output. The switching times are intentionally designed to be slow in or ...
Small signal analysis for DC bus voltage
Small signal analysis for DC bus voltage

... The three-phase voltage source converter (VSC) [1–3] has widespread applications, including active power filters, unified power flow control, high voltage direct current transmission, and power transmission for solar, wind, and other renewable energies. It can be also foreseen that the VSC could bec ...
Current-Mode Dual-Phase Precision Full
Current-Mode Dual-Phase Precision Full

... Basic and well known solutions using operational amplifiers [1] operate well only at low frequencies [2], [3] due to the finite slew-rate and effects caused by diode commutation. Therefore, for high-frequency applications other active elements such as current conveyors (CCs) [4]–[8], current-control ...
bq40z60 Charging Voltage Compensation
bq40z60 Charging Voltage Compensation

... The formula for the Minimum Output Voltage = 610 mV × (1 + R1 / R2), where we set R1 = 332 kΩ and R2 = 35.7 kΩ for a 3S configuration. So, the Minimum Output Voltage = 6283 mV The formula for the Voltage Resolution = (610 mV × (1 + R1 / R2)) / 256. So, Voltage Resolution = 6283 mV / 256 = 24.54 mV T ...
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Pulse-width modulation



Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a modulation technique used to encode a message into a pulsing signal. Although this modulation technique can be used to encode information for transmission, its main use is to allow the control of the power supplied to electrical devices, especially to inertial loads such as motors. In addition, PWM is one of the two principal algorithms used in photovoltaic solar battery chargers, the other being MPPT.The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast rate. The longer the switch is on compared to the off periods, the higher the total power supplied to the load.The PWM switching frequency has to be much higher than what would affect the load (the device that uses the power), which is to say that the resultant waveform perceived by the load must be as smooth as possible. Typically switching has to be done several times a minute in an electric stove, 120 Hz in a lamp dimmer, from few kilohertz (kHz) to tens of kHz for a motor drive and well into the tens or hundreds of kHz in audio amplifiers and computer power supplies.The term duty cycle describes the proportion of 'on' time to the regular interval or 'period' of time; a low duty cycle corresponds to low power, because the power is off for most of the time. Duty cycle is expressed in percent, 100% being fully on.The main advantage of PWM is that power loss in the switching devices is very low. When a switch is off there is practically no current, and when it is on and power is being transferred to the load, there is almost no voltage drop across the switch. Power loss, being the product of voltage and current, is thus in both cases close to zero. PWM also works well with digital controls, which, because of their on/off nature, can easily set the needed duty cycle.PWM has also been used in certain communication systems where its duty cycle has been used to convey information over a communications channel.
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