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Unit 2 - Mahalakshmi Engineering College
Unit 2 - Mahalakshmi Engineering College

edssc_2015_full_paper - DR-NTU
edssc_2015_full_paper - DR-NTU

... compensate the delay time variation of comparators when temperature varies. On the other hand, resistors with positive and negative temperature coefficient are also implemented which requires additional masks in fabrication process. However, most of them use analog integrator feedback loop to get th ...
ISL6568 - Intersil
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... differential amplifier is provided for remote voltage sensing, compensating for any potential difference between remote and local grounds. The output voltage can also be positively or negatively offset through the use of a single external resistor. A unique feature of the ISL6568 is the combined use ...
Lab #4 Thevenin`s Theorem
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... 11. The graph below represents the relationship between the current in a metallic conductor and the potential difference across the conductor at constant temperature. ...
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CLU701-1002C4 - citizen electronics co.,ltd.

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DM74LS373 • DM74LS374 3-STATE Octal D

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Cable current transformers - PFIFFNER Instrument Transformers Ltd

... The cable current transformer is designed for installation on fully insulated medium and high voltage cables or for installation on medium and high voltage bushings. This enables a space-saving system design. Primary currents of up to 5000 A can be measured. A specific core padding and the complete ...
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Mutant Clap - Control Voltage

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Analog and Digital Circuits Using Organic Thin-Film Transistors on Polyester Substrates
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Ms. Todd`s Honors Physics
Ms. Todd`s Honors Physics

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mic+600/DD/TC - Automation24

... of up to ten sensors automatically also operates in a mixed configuration of sensors with different detection ranges. The measurement repetition rate is then determined by the sensor with the largest detection range. If the sensors are electrically connected via pin 5 of the M12 circular connector, t ...
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... conditions. The disadvantages with this type of arrestor is that that the atmospheric conditions effect the performance of arrestor and the corrosion and pitting of horns change the characteristics of the arrestor. These type of arrestors are used in the distribution lines. Silicon Carbide arrestors ...
Lab One: Introductory Digital Design Laboratory
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MAX9164 3.3V Single LVDS Driver/Receiver General Description Features
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... The MAX9164 high-speed LVDS driver/receiver is designed specifically for low-power point-to-point applications. The MAX9164 operates from a single 3.3V power supply, and is pin compatible with the DS90LV019. The device features an independent differential driver and receiver. The MAX9164 driver outp ...
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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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