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Capacitors File
Capacitors File

Lab-18-(Circuit Analysis)
Lab-18-(Circuit Analysis)

... total quantity of charge leaving the junction each second. If this were not true, charge would accumulate on the junction. Since like charges repel, this is unlikely and could not be sustained unless a separate energy source were available to constrain the charges to the node. This is the origin of ...
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LM301A-N 数据资料 dataSheet 下载

... Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant ...
LF156 数据资料 dataSheet 下载
LF156 数据资料 dataSheet 下载

... common-mode limit on both inputs will force the amplifier output to a high state. In neither case does a latch occur since raising the input back within the common-mode range again puts the input stage and thus the amplifier in a normal operating mode. Exceeding the positive common-mode limit on a s ...
experiment 6 - Portal UniMAP
experiment 6 - Portal UniMAP

iW656 Product Summary - Dialog Semiconductor
iW656 Product Summary - Dialog Semiconductor

... Information in this document is believed to be accurate and reliable. However, Dialog Semiconductor does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information. Dialog Semiconductor furthermore takes no responsibility whatsoever for t ...
PSPICE tutorial: MOSFETs
PSPICE tutorial: MOSFETs

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Unified Power Quality Conditioner: A Review

... three-phase, three-wire system. The two active filters are composed of two 3-leg voltage source inverters (VSI). Functionally, the series filter is used to compensate for the voltage distortions while the shunt filter is needed to provide reactive power and counteract the harmonic current injected b ...
YI-WS5S20N(4)
YI-WS5S20N(4)

... Do not apply any stress to the lead, particularly when heated The LEDs must not be repositioned after soldering After soldering the LEDs, the epoxy bulb should be protected from mechanical shock or vibration until the LEDs return to room temperature. Direct soldering onto a PC board should be avoide ...
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... Issue 3 of the Kilovar Briefs discussed steady state sources of harmonics. These included arc furnaces, solid state energy conversion equipment, rotating machinery and transformers. During steady state operation of an AC power system, harmonics in the transformer magnetizing current are a small perc ...
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... CF is 8.53 Hz. Many calibration benches used to verify meter accuracy still use optical techniques. This limits the maximum frequency which can be reliably read to about 10 Hz. The only remaining unknown from Equation 1 is V2 or the signal level on Channel 2 (the voltage channel). ...
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... when the DMM is placed across a circuit for a measurement, it will have little impact on circuit performance. This is the desired effect for most voltage measurement applications and is especially important for sensitive electronics or control circuits. The main advantage of high impedance input tes ...
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Direct Current and Alternating Current Transmission

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... to RLC circuit – Oscillations said to be or forced – Oscillations occur at driving frequency, ωd – When ωd = ω, called resonance, current amplitude, I, is maximum ...
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OP27 - Analog Devices

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N:2-3 / Series and Parallel Circuits

... •Of course you would not. •With a series circuit, all the electrical devices in your home would go off every time a light bulb burned out or a switch was turned off. •Instead, the circuits in your home are parallel circuits. ...
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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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