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Aalborg Universitet Islanded Microgrids
Aalborg Universitet Islanded Microgrids

SSM2166 数据手册DataSheet 下载
SSM2166 数据手册DataSheet 下载

... Figure 15 illustrates a typical transfer characteristic for the SSM2166 where the output level in decibels is plotted as a function of the input level in decibels. The dotted line indicates the transfer characteristic for a unity-gain amplifier. For input signals in the range of VDE (downward expans ...
ELECTROANTENNOGRAPHY - Ockenfels Syntech GmbH
ELECTROANTENNOGRAPHY - Ockenfels Syntech GmbH

... than that of the antenna (10 M ) almost the full voltage of 1 mV is present at the input of the amplifier, and thus available for further amplification. The conclusion from this exercise with Ohm’s law is that the input resistance of the amplifier should be much higher than that of the antennal resi ...
Feedback
Feedback

TS4621ML - STMicroelectronics
TS4621ML - STMicroelectronics

99% Efficiency True-Bridgeless Totem-Pole PFC
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... the PFC are the VDC, VAC-P, VAC-N and IL. The input voltage polarity and Rms value are determined from VAC-P and VAC-N. The outer voltage loop output multiplied by |VAC| gives sinusoidal current reference. Current loop gives the proper duty-ratio for boost circuit. The polarity determined how PWM si ...
AN105 - Current Sense Circuit Collection
AN105 - Current Sense Circuit Collection

... so the ultra-high precision concept can be utilized at higher voltages than the fully integrated ICs mentioned. This circuit simply commutates charge from the flying sense capacitor to the ground-referenced output capacitor so that under dc input conditions the single-ended output voltage is exactly ...
Interactive computer aided design of permanent magnet DC motors
Interactive computer aided design of permanent magnet DC motors

... the magnets (B,) by the ratio of the magnet to airgap crosssectional area. In order to account for flux focusing within the magnet, the magnet area is calculated at a radius one third the distance from the inner surface of the magnet (i.e., a radius equal to D,/2 1, lm/3).The magnet area is also adj ...
Effect of Series Active Voltage Conditioners on Modernized Grid
Effect of Series Active Voltage Conditioners on Modernized Grid

AN-804 Improving A/D Converter Performance Using Dither
AN-804 Improving A/D Converter Performance Using Dither

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Single-Phase Power/Energy Meter with Tamper

... Power meters are sometimes referred to as energy meters and vice versa. Per definition, (active) power is a measure of what is required (or consumed) in order to perform useful work. For example, a light bulb with a 100W rating consumes 100 watts of active power in order to create light (and heat). ...
ADS1000-Q1 数据资料 dataSheet 下载
ADS1000-Q1 数据资料 dataSheet 下载

... The I2C bus is bidirectional: the SDA line is used both for transmitting and receiving data. When a master reads from a slave, the slave drives the data line; when a master sends to a slave, the master drives the data line. The master always drives the clock line. The ADS1000 never drives SCL, becau ...
16340-1: medium voltage metal-clad switchgear
16340-1: medium voltage metal-clad switchgear

... 8. Space heaters, rated 240VAC, shall be supplied to prevent moisture condensation in the breaker enclosure. Heaters shall be thermostatically controlled and located in the low voltage compartment. The heater control circuit shall be provided with fused switches or low voltage circuit breakers for d ...
Institutionen för systemteknik R/2R DAC Nonlinearity Compensation Department of Electrical Engineering Master’s thesis
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... Kirchoff’s current law Kirchoff’s voltage law Least significant bit Most significant bit Operational amplifier Pulse-amplitude modulation Successive approximation Spurious-free dynamic range Signal-to-noise-and-distortion ratio Signal-to-noise ratio Time-discrete Fourier transform Total harmonic dis ...
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Power Supplies
Power Supplies

Starting and control of three-phase asynchronous motors
Starting and control of three-phase asynchronous motors

... solution, as high peak currents influence the electrical supply, and torque surges subject the mechanical components of the machine or system to high levels of stress. The soft starter provides a remedy. It enables a continuous and surge-free increase in torque and also offers the opportunity for a ...
10121017, 10121032, 10121064, 10121034
10121017, 10121032, 10121064, 10121034

... 1.2 Worldwide Statistical Report ...............................................................................................16 1.3 History of Accident due to fire in Bangladesh .....................................................................17 1.4 What are robots ........................... ...
Affordable solutions designed around your needs
Affordable solutions designed around your needs

1968 IEEE: Fluctuation phenomena in nerve membrane
1968 IEEE: Fluctuation phenomena in nerve membrane

... nerve membrane was adapted to the object of investigation, a single nerve fiber of the sciatic nerve of the frog, Rana temporaria. Electrical properties of the node of Ranvier in the resting state and of the internodal segments and physical dimensions of both are given in Table I. Dynamic properties ...
SiGe - NTU
SiGe - NTU

... new extrinsic base construction with a low resistance collector design to simultaneously minimize base resistance, collector resistance and base-collector capacitance. (i)Gate delays of 3.6ps per stage are achieved for CML ring oscillators at a differential voltage swing of 300mV (ii)The HBTs demons ...
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MAX2058 700MHz to 1200MHz High-Linearity, SPI-Controlled DVGA with Integrated Loopback Mixer General Description
MAX2058 700MHz to 1200MHz High-Linearity, SPI-Controlled DVGA with Integrated Loopback Mixer General Description

... The MAX2058 high-linearity digital-variable-gain amplifier (DVGA) is designed to provide 62dB of total gain range and typical output IP3 and output P1dB levels of +32.3dBm and +19dBm, respectively. The device is ideal for a variety of applications, including RFID handheld and portal readers, as well ...
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NHMFL Interphase Transformer _2_
NHMFL Interphase Transformer _2_

... high current 12–pulse interphase transformers, and for four high current filter inductors. The 12–pulse interphase transformers and the filter inductors are to be stacked two high, resulting in four interphase/filter reactor assemblies. It is preferred that all of this equipment be delivered 16 week ...
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Resistive opto-isolator



Resistive opto-isolator (RO), also called photoresistive opto-isolator, vactrol (after a genericized trademark introduced by Vactec, Inc. in the 1960s), analog opto-isolator or lamp-coupled photocell, is an optoelectronic device consisting of a source and detector of light, which are optically coupled and electrically isolated from each other. The light source is usually a light-emitting diode (LED), a miniature incandescent lamp, or sometimes a neon lamp, whereas the detector is a semiconductor-based photoresistor made of cadmium selenide (CdSe) or cadmium sulfide (CdS). The source and detector are coupled through a transparent glue or through the air.Electrically, RO is a resistance controlled by the current flowing through the light source. In the dark state, the resistance typically exceeds a few MOhm; when illuminated, it decreases as the inverse of the light intensity. In contrast to the photodiode and phototransistor, the photoresistor can operate in both the AC and DC circuits and have a voltage of several hundred volts across it. The harmonic distortions of the output current by the RO are typically within 0.1% at voltages below 0.5 V.RO is the first and the slowest opto-isolator: its switching time exceeds 1 ms, and for the lamp-based models can reach hundreds of milliseconds. Parasitic capacitance limits the frequency range of the photoresistor by ultrasonic frequencies. Cadmium-based photoresistors exhibit a ""memory effect"": their resistance depends on the illumination history; it also drifts during the illumination and stabilizes within hours, or even weeks for high-sensitivity models. Heating induces irreversible degradation of ROs, whereas cooling to below −25 °C dramatically increases the response time. Therefore, ROs were mostly replaced in the 1970s by the faster and more stable photodiodes and photoresistors. ROs are still used in some sound equipment, guitar amplifiers and analog synthesizers owing to their good electrical isolation, low signal distortion and ease of circuit design.
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