• 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
Low Power Low Offset Voltage Single Comparator
Low Power Low Offset Voltage Single Comparator

... Note 1: For operating at high temperatures, the GS391 must be derated based on a 125ºC maximum junction temperature and a thermal resistance of 170ºC /W which applies for the device soldered in a PCB, operating in a still air ambient. The low bias dissipation and the “ON-OFF” characteristic of the o ...
Test Procedure for the NCV8853GEVB Evaluation Board
Test Procedure for the NCV8853GEVB Evaluation Board

... 1. Connect a dc input voltage, within the 6.0 V to 36 V range, between VIN and GND 2. Connect a load between VOUT and GND 3. Connect a dc enable voltage, within the 2.0 V to 5.5 V range, between EN/SYNC and GND 4. Optionally, for external clock synchronization, connect a pulse source between EN/SYNC ...
Microcare 10kw Grid Tied Inverter
Microcare 10kw Grid Tied Inverter

... upgraded and a range of Grid Tied Inverters using High Frequency Pulse Width Modulation (PWM) to regulate the output of the inverter has been introduced. The 10kw to 15 kw 3-phase series are applicable to all small commercial grid connected systems. This series of inverters have two MPPT trackers an ...
Light Emitting Diodes IV Characteristics.
Light Emitting Diodes IV Characteristics.

CURRENT, RESISTANCE, AND ELECTROMOTIVE FORCE
CURRENT, RESISTANCE, AND ELECTROMOTIVE FORCE

... (a) IDENTIFY: By definition, J = I/A and radius is one-half the diameter. SET UP: Solve for the current: I = JA = Jπ(D/2)2 EXECUTE: I = (1.50 106 A/m2)(π)[(0.00102 m)/2]2 = 1.23 A EVALUATE: This is a realistic current. (b) IDENTIFY: The current density is J = nqvd SET UP: Solve for the drift velocit ...
Physics Challenge Question 1: Solutions
Physics Challenge Question 1: Solutions

7510 - Analog Modules, Inc.
7510 - Analog Modules, Inc.

TDA2050 - 32W Hi-Fi Audio Power Amplifier Datasheet
TDA2050 - 32W Hi-Fi Audio Power Amplifier Datasheet

... - Set the voltage supply at the maximum operating value; - Apply a input signal in the form of a 1KHz tone burst of 1 sec duration: the repetition period of the signal pulses is 60 sec; - The output voltage is measured 1 sec from the start of the pulse; - Increase the input voltage until the output ...
LA5724MC
LA5724MC

Cell Voltage Calibration
Cell Voltage Calibration

SAC SILK GlowMaster KT88 true balanced Class A Power Amplifier
SAC SILK GlowMaster KT88 true balanced Class A Power Amplifier

... vacuum tube designs for under 100 watt RMS per channel amplifier. Its low output impedance and high damping factor means that it can fully control any loudspeaker with precise timing and pace even from low listening level to the highest level. Its true wide bandwidth means that it can equally render ...
SpeakerCraft SC2-50
SpeakerCraft SC2-50

interface ASD-NIB Analog Signal & Discrete Non-Incendive Barrier
interface ASD-NIB Analog Signal & Discrete Non-Incendive Barrier

Simple R-C Circuits Lab
Simple R-C Circuits Lab

... 2. Select a voltage on your power supply and measure the value with the multimeter. Next, vary the resistance and record the current measurement for each resistance value. Measure the resistance with the multimeter and the current with the current meter. Remember to disconnect the resistor from the ...
Document
Document

Charging a Battery Circuits Containing Capacitors in Series and in
Charging a Battery Circuits Containing Capacitors in Series and in

A cmos bandgap reference without resistors - Solid
A cmos bandgap reference without resistors - Solid

Resistance in Series Circuits
Resistance in Series Circuits

... the sum of the individual branch conductances. ...
Series vs. Parallel Circuit
Series vs. Parallel Circuit

Electric Circuits
Electric Circuits

MSE15
MSE15

... varies from 5 to 20 mA. If the Zener voltage is 6.8 V, the maximum value of series resistor is A. 410  B. 660  C. 320  D. 570  074. An amplifier comprises of four stages in CE configuration and the overall gain is 9  104. If the first two stages have a voltage gain of 20 per stage and other two ...
Mir4
Mir4

... should be between 3 and 5 Volts. It is safe to have an A-meter connected. In case of excessive current (> 100 mA), switch off immediately and check. The processor should survive a 1-2 second inversion of polarity. A high current may also be due to a transistor with a bad input connection. Both trans ...
The Ohmic Region of a Lightbulb
The Ohmic Region of a Lightbulb

... is visible! Nearly all of the remaining 94.8 ± 0.5% is infrared radiation, and 0.04 ± 0.01% of the radiation is in the ultraviolet spectrum. These uncertainties are approximate becuase Planck’s law has no simple closed form, so the uncertainty was calculated using the difference between calculation ...
4 - Electric Circuits
4 - Electric Circuits

Using the HP Z3801A as a Lab Frequency Standard
Using the HP Z3801A as a Lab Frequency Standard

... operation. The GPS receiver has front panel tell-tales that indicate power and lock or holdover mode. There are also other LEDs that under software control. However, the timing, position, tracking and other information is only available though the serial port. My Z3801A came with PC software that pr ...
< 1 ... 2008 2009 2010 2011 2012 2013 2014 2015 2016 ... 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