• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
PowerPoint 프레젠테이션
PowerPoint 프레젠테이션

... The resolution of a discharge detector is equal to the smallest value of r which is determined by the smallest of the following three values: ...
1200-Volt IC Changes the Way 3-Phase Motor Drive
1200-Volt IC Changes the Way 3-Phase Motor Drive

NCV8851BDBGEVB NCV8851B Automotive Grade Synchronous Buck Controller Evaluation Board
NCV8851BDBGEVB NCV8851B Automotive Grade Synchronous Buck Controller Evaluation Board

... ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any partic ...
To Pot or Not Two common types of electrical testing are easily
To Pot or Not Two common types of electrical testing are easily

Optic Rotation Project One - Stony Brook Laser Teaching Center
Optic Rotation Project One - Stony Brook Laser Teaching Center

... of devices. We have installed a PZT to one end of the diffraction grating, and now we use a pulse/function generator to generate a cyclic triangle-shaped voltage and apply it on PZT. The PZT crystal will then accordingly contract or extend depending on the strength and polarity of the voltage bias, ...
SGC-2486Z
SGC-2486Z

... IDVD < (TJ - TL) / RTH, j-l ...
LM3916 Datasheet
LM3916 Datasheet

... In order for display to make sense when multiple drivers are cascaded in dot mode, special circuitry has been included to shut off LED #10 of the first device when LED #1 of the second device comes on. The connection for cascading in dot mode has already been described and is depicted in Figure 16. ...
Low-Noise, 900kHz, RRIO, Precision OPERATIONAL AMPLIFIER Zerø-Drift Series OPA378
Low-Noise, 900kHz, RRIO, Precision OPERATIONAL AMPLIFIER Zerø-Drift Series OPA378

... the output of the op amp is driven to one of the supply rails the feedback loop requirements cannot be satisfied and a differential input voltage develops across the input pins. This differential input voltage results in activation of parasitic diodes inside the front end input chopping switches tha ...
DCX69/-16/-25 Features Mechanical Data Ordering Information
DCX69/-16/-25 Features Mechanical Data Ordering Information

... Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks. LIFE SUPPORT Diodes Incorporated products are specifically n ...
G. Surge Impedance Loading (SIL)
G. Surge Impedance Loading (SIL)

CHAPTER 4. OVERVOLTAGES
CHAPTER 4. OVERVOLTAGES

... • (a) when the subject is close to a parallel hit or other tall object, • (b) due to an intense electric field from a stroke which can induce sufficient current to cause death, • (c) when lightning terminating on earth sets up high potential gradients over the ground surface in an outwards direction ...
Implementing an Isolated 1-Wire Bus
Implementing an Isolated 1-Wire Bus

H-bridge inverter control circuit lab document
H-bridge inverter control circuit lab document

TPS6300x High-Efficient Single Inductor Buck
TPS6300x High-Efficient Single Inductor Buck

... three-cell alkaline, NiCd or NiMH battery, or a onecell Li-ion or Li-polymer battery. Output currents can go as high as 1200 mA while using a single-cell Li-ion or Li-polymer battery, and discharge it down to 2.5 V or lower. The buck-boost converter is based on a fixed frequency, pulse width modulat ...
Parasitic Inductance Effect on Switching Losses for a High
Parasitic Inductance Effect on Switching Losses for a High

TPS797xx - Texas Instruments
TPS797xx - Texas Instruments

... to the input and is not internally limited. If extended reverse voltage operation is anticipated, external limiting might be appropriate. The TPS797xx features internal current limiting. During normal operation, the TPS797xx limits output current to approximately 190 mA. When current limiting engage ...
PRODUCT CODE: Carminder BARCODE: 9332820000825
PRODUCT CODE: Carminder BARCODE: 9332820000825

Nanotherm® DM: Inorganic Insulated Metal Substrate Benefits Call
Nanotherm® DM: Inorganic Insulated Metal Substrate Benefits Call

Integrated IC
Integrated IC

High PSR Low Drop-out Voltage Regulator (LDO)
High PSR Low Drop-out Voltage Regulator (LDO)

General Description Features
General Description Features

... The MAX16833/MAX16833B–MAX16833D are peak current-mode-controlled LED drivers for boost, buckboost, SEPIC, flyback, and high-side buck topologies. A dimming driver designed to drive an external p-channel in series with the LED string provides wide-range dimming control. This feature provides extreme ...
Solutions / Answers
Solutions / Answers

noise - London South Bank University
noise - London South Bank University

The notion of modeling among the students of technical
The notion of modeling among the students of technical

Hall Effect Products Surface Mount Sensors SS5 Series
Hall Effect Products Surface Mount Sensors SS5 Series

... a industry standard "gull-wing" design which makes it less susceptible to "solder bridging" and allows increased circuit board density. The SS5 series package can accommodate larger IC’s than SS1 and allows for fourpin designs The integrated circuits are designed to provide predictable performance o ...
< 1 ... 1215 1216 1217 1218 1219 1220 1221 1222 1223 ... 2207 >

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.
  • studyres.com © 2026
  • DMCA
  • Privacy
  • Terms
  • Report