• 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
SIMATIC S7-200 SMART
SIMATIC S7-200 SMART

DS1250Y/AB 4096k Nonvolatile SRAM FEATURES PIN ASSIGNMENT
DS1250Y/AB 4096k Nonvolatile SRAM FEATURES PIN ASSIGNMENT

... 6. If the CE low transition occurs simultaneously with or latter than the WE low transition, the output buffers remain in a high-impedance state during this period. 7. If the CE high transition occurs prior to or simultaneously with the WE high transition, the output buffers remain in high-impedance ...
Primary Coil or Primary Winding
Primary Coil or Primary Winding

... • The power loss is converted to heat . The heat produced can be found by calculating the transformer efficiency. ...
EC23776782
EC23776782

Prediction of Noise Generated by Electromagnetic Forces
Prediction of Noise Generated by Electromagnetic Forces

SN74F126  QUADRUPLE BUS BUFFER GATE WITH 3-STATE OUTPUTS
SN74F126 QUADRUPLE BUS BUFFER GATE WITH 3-STATE OUTPUTS

Optocoupler, Phototransistor Output, with Base Connection
Optocoupler, Phototransistor Output, with Base Connection

... Parameters provided in datasheets and / or specifications may vary in different applications and performance may vary over time. All operating parameters, including typical parameters, must be validated for each customer application by the customer’s technical experts. Product specifications do not ...
Lecture 7
Lecture 7

ATV28HU09M2 SCHNEIDER ELECTRIC
ATV28HU09M2 SCHNEIDER ELECTRIC

... Use with a motor with a power different to the speed controller rating The device can supply any motor with a power less than that for which it is designed. For motor powers slightly greater than the speed controller rating, ensure that the current taken does not exceed the continuous output current ...
Description - lmn.pub.ro
Description - lmn.pub.ro

Twitter - Texas Instruments
Twitter - Texas Instruments

RHP020N06
RHP020N06

ADP2105 数据手册DataSheet 下载
ADP2105 数据手册DataSheet 下载

... Changes to Table Summary Statement .......................................... 4 Changes to LX Minimum On-Time Parameter, Table 1 ............. 5 7/08—Rev. A to Rev. B Changes to General Description Section ...................................... 1 Changes to Figure 3 ................................. ...
Instantaneous Active and Reactive Power and Current Strategies for
Instantaneous Active and Reactive Power and Current Strategies for

hxlvdsr - Honeywell
hxlvdsr - Honeywell

A TELEMETRY SYSTEM FOR FIREFIGHTERS
A TELEMETRY SYSTEM FOR FIREFIGHTERS

... Due to this, an active filter is essential to amplify the signal in the circuit and also to filter the noise. The schematic shown in Fig 2 is the circuit diagram for the low-pass filter implemented for the Oxygen Sensor and Fig 3 shows the Bode plot for the Oxygen sensor. The active filter uses two ...
Manual - Tone King Amplifier Company
Manual - Tone King Amplifier Company

... Volume and Attenuation The Royalist is a non-master-volume amp, just like an old JTM45. This means that the volume control alone determines the signal level through the amplifier. This makes it simple to dial in. You turn the volume control down for clean tones, and turn it up to overdrive the amp ...
DIGITAL ELECTRONICS LECTURE NOTES
DIGITAL ELECTRONICS LECTURE NOTES

Capacitor and inductors
Capacitor and inductors

General Description Features
General Description Features

... design supplies load currents up to 150A for low-voltage CPU core power requirements. A tri-state SEL input is available to configure the VID logic for either the Intel VRD11/VRD10 or AMD K8 Rev F applications. An enable input (EN) is available to disable the IC. True-differential remote output-volt ...
Design optimizations of phase noise, power consumption and
Design optimizations of phase noise, power consumption and

Introduction to Fundamental Crystal Oscillators
Introduction to Fundamental Crystal Oscillators

... This capacitance is not related to any capacitance present in the crystals or the circuit but refers to the load capacitance used when crystals are measured in standard test sets. The preferred value of capacitance is 30 pF but crystals can be manufactured for other values. These circuits are design ...
PWM - Dimmer
PWM - Dimmer

Example Generic Electrical Procedure Manual
Example Generic Electrical Procedure Manual

... 2.1.9. Note 5: Errors due self-heating and voltage coefficients Measuring resistors at high power levels (above 0.5 watts) will cause the resistor to heat up, due to the temperature co-efficient of the resistor the value will change. As the temperature rise reaches an equilibrium the value of resist ...
Basic Circuit Elements - New Age International
Basic Circuit Elements - New Age International

< 1 ... 690 691 692 693 694 695 696 697 698 ... 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