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... The ARM modulator, coupled to a 400nm # 220nm bus waveguide, has an integrated vertical p-n junction around its edge with p and n type doping concentrations of ~2#1018 cm–3 and interior p+ and n+ contacts with doping concentrations at a level of 1#1020 cm–3 (Fig. 1, left). The coupling region, singl ...
DIGITAL SERVO PROGRAMMER HFP-20 OPERATION
DIGITAL SERVO PROGRAMMER HFP-20 OPERATION

... like any traditional servo product. However Hitec expanded the capability of our digital servos to include the ability to program your own unique performance specification parameters. Many of you will have modern computer radios that will allow you to program most of these functions, some like dead ...
ILUMEN PID SOLUTION
ILUMEN PID SOLUTION

... ideal solution for medium and large scale projects. The Ilumen PID Control Box has integrated GPRS communication (to www.myilumen.be) so we can control the solution without going on site. ...
LTC4150 - Coulomb Counter/Battery Gas Gauge
LTC4150 - Coulomb Counter/Battery Gas Gauge

... presence of noise, spikes and ripple. 4.7μF is recommended for general applications but can be extended to higher values as long as the capacitor’s leakage is low. A 10nA leakage is roughly equivalent to the input offset error of the integrator. Ceramic capacitors are suitable for this use. Switchin ...
83-507-013 - TDK-Lambda Americas Inc.
83-507-013 - TDK-Lambda Americas Inc.

... This TDK-Lambda Americas Inc. product is warranted against defects in materials and workmanship for a period of five years from date of shipment. During the warranty period, TDK-Lambda Americas Inc. will, at it’s option, either repair or replace products which prove to be defective. ...
Voltage Collapse Mitigation - pes-psrc
Voltage Collapse Mitigation - pes-psrc

... collapse is a system wide phenomenon which cannot be described by knowledge of local conditions alone. To allow use of a scheme looking at the status of the critical equipment, manual arming and disarming by system operators may be required. This would place extra burden on system operators however, ...
industrial
industrial

P R O B L E M S
P R O B L E M S

... (a) For v sufficiently low that Q is cut off, find the value of the output voltage v . This is V . _ (b) For v, sufficiently high that Q is carrying all the current /, find the output voltage v . This is V . (c) Determine the value of v, that results in Q conducting 1% of /. This can be taken as V . ...
An Electronic Cause for Sudden Unintended Acceleration
An Electronic Cause for Sudden Unintended Acceleration

... one time, we find that the vehicle requires between 57 and 87 amps at any speed (depending upon whether the air conditioning system is being used), with another 10 to 76 amps required at low speeds (depending upon whether the cooling fans and ABS brakes are being used). This gives a total of 67 to 1 ...
Understanding Open Loop Gain of the PGA900
Understanding Open Loop Gain of the PGA900

... The PGA900 AOL curve is shaped by a low-frequency dominant pole, a midfrequency pole-zero pair, an additional zero, and a high-frequency triple pole. The complete PGA900 AOL curve is shown in Figure 1 and defined in Equation 1. The typical magnitude and phase response of the AOL curve changes due to ...
AX-SIGFOX - Ultra-Low Power, AT Command Controlled, Sigfox
AX-SIGFOX - Ultra-Low Power, AT Command Controlled, Sigfox

TENS Plus - Medi
TENS Plus - Medi

... 12 TENS Preset Programs P1-12 (see Programs Chart on back) Pulse Rate (Frequency): 2 - 150 Hz, 1 Hz/step Pulse Width (Duration): 50 - 300 microseconds (μs), 10 μs/step) Contraction (On) Time: 2 - 90 seconds, 1 sec/step Relaxation (Off) Time: 2 - 90 seconds, 1 sec/step Ramp Up/Down Time: 1 - 8 second ...
Design overhead distribution systems
Design overhead distribution systems

... Overhead transmission Overhead conductors are not covered by insulation. The conductor material is nearly always an aluminium alloy, made into several strands and possibly reinforced with steel strands. Copper was sometimes used for overhead transmission but aluminium is lower in weight for equivale ...
AN1653 ASB205-MPX5000 Series Sensor Module
AN1653 ASB205-MPX5000 Series Sensor Module

... It is supplied from a thermistor that has a nominal output voltage of 2.5 volts at 25 degrees C. This thermistor sees a temperature rise due to power dissipation on the board, and typically reads several degrees higher than ambient in still air. ...
SM12 Features Mechanical Data
SM12 Features Mechanical Data

... Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: ...
TLC274, TLC274A, TLC274B, TLC274Y, TLC279 LinCMOS
TLC274, TLC274A, TLC274B, TLC274Y, TLC279 LinCMOS

... description (continued) In general, many features associated with bipolar technology are available on LinCMOS operational amplifiers, without the power penalties of bipolar technology. General applications such as transducer interfacing, analog calculations, amplifier blocks, active filters, and si ...
Motion control Lexium 32i integrated drives
Motion control Lexium 32i integrated drives

Full-Text PDF
Full-Text PDF

... The accumulation scheme of the traditional N-stage digital domain CMOS TDI image sensor with L-bit column ADC, where L = ( M + K ) is shown in Figure 1. During the exposure time, the exposed object moves at a constant speed relative to the pixel array. The line time (TL ) is defined as the time that ...
Service Manual
Service Manual

Solution
Solution

... can also be studied in the frequency domain. Neglecting the effect of the filter in the data path, determine the transfer function from xBB(t) to Φout. Beginning from the output, we write the feedback signal arriving at the PFD as Φout/N, subtract it from 0 (the input phase), and multiply the result ...
Characteristics of DC generators
Characteristics of DC generators

... demagnetizing effect of armature reaction. This phenomenon is shown in the figure by the dotted line. Dotted portion of the characteristic gives approximately constant current irrespective of the external load resistance. This is because if load is increased, the field current is increased as field ...
LTM4603/LTM4603-1 - 6A DC/DC uModule with PLL, Output Tracking and Margining
LTM4603/LTM4603-1 - 6A DC/DC uModule with PLL, Output Tracking and Margining

... voltage range of 4.5V to 20V, the LTM4603 supports an output voltage range of 0.6V to 5V as well as output voltage tracking and margining. The high efficiency design delivers 6A continuous current (8A peak). Only bulk input and output capacitors are needed to complete the design. The low profile (2. ...
UWE Series - power, Murata
UWE Series - power, Murata

... open drain transistor. But it may also be driven with external logic or by applying appropriate external voltages which are referenced to Input Common. 6 Short circuit shutdown begins when the output voltage degrades approximately 2% from the selected setting. 7 The outputs are not intended to sink ...
AD8348 数据手册DataSheet 下载
AD8348 数据手册DataSheet 下载

... LO Inputs. For optimum performance, these inputs should be ac-coupled and driven differentially. Differential drive from single-ended sources can be achieved via a balun. To obtain a broadband 50 Ω input impedance, connect a 60.4 Ω shunt resistor between LOIP and LOIN. Typical input drive level is e ...
HYPERTHERM SENSOR™ PHC PLASMA HEIGHT CONTROL
HYPERTHERM SENSOR™ PHC PLASMA HEIGHT CONTROL

... 3) Suitable for use on a circuit capable of delivering not more than 5000rms symmetrical amperes,  230 volts maximum.  4) Integral solid state short circuit protection does not provide branch circuit protection.  Branch  circuit protection provided by integral LISTED branch circuit protection fuse.  ...
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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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