• 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
Fast, Parallel Two-Rail Code Checker with Enhanced Testability*
Fast, Parallel Two-Rail Code Checker with Enhanced Testability*

DET-L SERIES Oriel ® Amplified Detectors
DET-L SERIES Oriel ® Amplified Detectors

The PIC-EL
The PIC-EL

RF5616 3.0V TO 5.0V, 5GHz LINEAR POWER AMPLIFIER Features
RF5616 3.0V TO 5.0V, 5GHz LINEAR POWER AMPLIFIER Features

... First, second, and third stage bias voltage combined on the die to one external voltage. This Pin requires regulated supply for best performance. Supply voltage for the PA. Internally decoupled with approximately 100pF. Power detector voltage is proportional to RF output power. May need external dec ...
Edward`s slides (PPT download)
Edward`s slides (PPT download)

... ABB UL Current Limiting Breakers: ...
300B Temperature Controller Manual
300B Temperature Controller Manual

document
document

... H.P. of work without exceeding its temperature rise requirements. A 10 H.P. motor with a 1.15 S.F. can produce 11.5 H.P. of work without exceeding its temperature rise requirements. Overloads, with the resulting overcurrents, if allowed to continue, will cause heat build-up within the motor. The out ...
Reference Divider
Reference Divider

Troubleshoot Manual - Guillen`s Enterprises, Inc.
Troubleshoot Manual - Guillen`s Enterprises, Inc.

LTC4307 - Low Offset Hot Swappable 2
LTC4307 - Low Offset Hot Swappable 2

SRM1 Datasheet
SRM1 Datasheet

... Note: ...
Fast Acting Fuse for Semicon- ductor Protection
Fast Acting Fuse for Semicon- ductor Protection

High Performance CMOS Transmitters for
High Performance CMOS Transmitters for

User Manuals - Fieldpiece Instruments
User Manuals - Fieldpiece Instruments

Rosemount™ 8600 Series Utility™ Vortex Flowmeter
Rosemount™ 8600 Series Utility™ Vortex Flowmeter

M A N U A L
M A N U A L

... This symbol is used throughout this manual to draw attention to topics of special importance to the installation and operation of the IMS2 soft starter. Caution Statements cannot cover every potential cause of equipment damage but can highlight common causes of damage. It is therefore the installer’ ...
Guide and Requirements for Service at 69000 to 287000
Guide and Requirements for Service at 69000 to 287000

... incoming transmission line insulation. At 230 kV and 287 kV it is BC Hydro's practice to install overhead ground wires on transmission structures from the station out 500 m. Customers may wish to use the same practice at their stations. The critical flashover levels for standard BC Hydro line constr ...
TDA8025HN
TDA8025HN

... voltages are high enough to ensure correct operation of the TDA8025 and flawless communication between it and the microcontroller. This information is combined and sent to the digital controller in order to reset the TDA8025. An extension of the power-on reset pulse width of ± 8 ms (tw(POR)) is used ...
EGN-1002-Microcontro..
EGN-1002-Microcontro..

... Ground- 0V (Vss) Regulated 5V output (Vdd) ...
I×R - KTH
I×R - KTH

... Temperature affects virtually all physical phenomena - even when you are not primarily interested in measuring the temperature, one must often still measure it in order to correct for its impact on other variables! ...
Integrating Electronic Equipment and Power into Rack Enclosures
Integrating Electronic Equipment and Power into Rack Enclosures

AN907 - Stepping Motors Fundamentals
AN907 - Stepping Motors Fundamentals

... With appropriate control systems, both permanent magnet and hybrid motors can be microstepped, allowing positioning to a fraction of a step, and allowing smooth, jerk-free moves from one step to the next. Microstepping is not generally applicable to variable reluctance motors. These motors are typic ...
AN 366: Understanding I/O Output Timing for Altera Devices
AN 366: Understanding I/O Output Timing for Altera Devices

... To calculate the system tCO using method 2, choose the Output Pin Load option with an output pin load of 6 pF in the Quartus II software and rerun timing analysis. The 6 pF represents the 4 pF pin capacitance of the DQ pin, as described in the Micron data sheet, and a 2 pF capacitance representing t ...
Ch28 Direct Current Circuits
Ch28 Direct Current Circuits

... bed frame. If your grandmother touched the faulty knob and the bed frame at the same time, she could receive quite a jolt, as there would be a potential difference of 120 V across her. If the 120 V is DC, the shock could send her into ventricular fibrillation, and the hospital staff could use the de ...
Power Distribution Systems
Power Distribution Systems

... Goals of System Design When considering the design of an electrical distribution system for a given customer and facility, the electrical engineer must consider alternate design approaches that best fit the following overall goals. 1. Safety: The No. 1 goal is to design a power system that will not ...
< 1 ... 67 68 69 70 71 72 73 74 75 ... 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