• 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
88974134 - Crouzet
88974134 - Crouzet

... ≤ 2 V for I = 0.5 A (at state 1) Make ≤ 1 ms Release ≤ 1 ms 1 Maximum on inductive load Against overloads and short-circuits : Yes Against overvoltages (*) : Yes Against inversions of power supply : Yes (*) In the absence of a volt-free contact between the logic controller output and the load 1 mA 0 ...
Series and Parallel Circuits
Series and Parallel Circuits

Powerpoint Slides
Powerpoint Slides

... In general, the resistance of materials goes up as the temperature goes up, due to thermal effects. This property can be used in thermometers. Resistivity decreases as the temperature decreases, but there is a certain class of materials called superconductors in which the resistivity drops suddenly ...
GNS RF2480
GNS RF2480

... Power supply for all circuits except the RF output stage. An external capacitor is needed if no other low frequency bypass capacitor is nearby. Power Down control. When this pin is "low", all circuits are shut off. A "low" is typically 1.2V or less at room temperature.When this pin is "high" (VCC), ...
Técnicas de Leitura - Etec Trajano Camargo
Técnicas de Leitura - Etec Trajano Camargo

... houses with the help of computers, our paylips are printed by computers, we pay bills prepared by computers, using checks marked with computer symbols, and the payments result in bank statements prepared by computers. Even more directly associated with the machines are those who use them in their da ...
AMICSA2016_B_Ferguson
AMICSA2016_B_Ferguson

The PXS Series of proportional extra-small high
The PXS Series of proportional extra-small high

Analysis of a New Third Harmonic Injection Active Rectifier Topology
Analysis of a New Third Harmonic Injection Active Rectifier Topology

Lecture - Montana State University
Lecture - Montana State University

... soon led to vacuum tubes, and audio engineering • WWII: radar, and early computers • Then came the transistor and the solid state era (analog and digital), including microprocessors • Now lasers, optics, microfabrication, etc. ...
Sensor specifications - CMA
Sensor specifications - CMA

CIRCUIT FUNCTION AND BENEFITS
CIRCUIT FUNCTION AND BENEFITS

... environment and the targeted application. For example, automotive applications must withstand a high level of EMC noise and transient pulses at the system level. Therefore, this type of application requires a design suitable for harsh electrical and physical environments. ...
Current Sensor (0222i) - CMA
Current Sensor (0222i) - CMA

... The Current sensor 0222i is designed for measuring small currents in AC and DC circuits in the range between -500 and +500 mA. It has two banana (4-mm) plugs for easy connection. The sensor contains a sensing element and a signal-conditioning amplifier. The sensing element is a 0.4  resistor (0.3 W ...
Capacitor Start and Capacitor Start/Capacitor
Capacitor Start and Capacitor Start/Capacitor

... RPM-sensitive voltage to the main AC input voltage (which serves as a reference voltage), the switch determines when the start circuit should be de-energized. The electronic switch interrupts the start circuit current after the motor has accelerated to the cut out voltage (speed), and reconnects the ...
MOBILE BUG
MOBILE BUG

... IC1 is designed as a differential amplifier Non inverting input is connected to the potential divider R1, R2. Capacitor C2 keeps the non inverting input signal stable for easy swing to + or – R3 is the feedback resistor IC1 functions as a current to voltage converter, since it converts the tiny curr ...
DAT 2166
DAT 2166

q I t =
q I t =

ECH8420 DATA SHEET General-Purpose Switching Device Applications
ECH8420 DATA SHEET General-Purpose Switching Device Applications

... Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment. The products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpos ...
Microphones - Music Technology 2
Microphones - Music Technology 2

RSB16F2
RSB16F2

Neutral Point Clamped (Npc) Type Multilevel Inverter
Neutral Point Clamped (Npc) Type Multilevel Inverter

AND8425 - Detection Voltage Selection Guidelines for Application of
AND8425 - Detection Voltage Selection Guidelines for Application of

... 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 particular purpose, nor doe ...
6-SIMULATION OF TRANSFER FUNCTION USING OP
6-SIMULATION OF TRANSFER FUNCTION USING OP

... 1. Connect the circuit as per the circuit diagram shown in fig (i). 2. A square wave input is given to both the integrator and non inverting amplifier circuits. 3. +Vcc and –Vee are applied as +10v and -10v at 7 and 4 pins respectively for every circuit shown in the circuit diagram. 4. Individual ou ...
Working With Optically-Isolated Relays
Working With Optically-Isolated Relays

... isolated relays, including PhotoMOS, this loss of LED power affects the device’s operating characteristics and lifecycle. Rising Currents. As LED power falls, the relay’s operating ...
synchronous
synchronous

... current) without any change in its load. Without overloading the motor, to what extent can the factory power factor be improved? Find the current and power factor of the synchronous motor for this condition. ...
Document
Document

< 1 ... 1528 1529 1530 1531 1532 1533 1534 1535 1536 ... 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