• 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
ADF4360-4 Integrated Synthesizer and VCO Data
ADF4360-4 Integrated Synthesizer and VCO Data

AX-SIGFOX - Ultra-Low Power, AT Command Controlled, Sigfox
AX-SIGFOX - Ultra-Low Power, AT Command Controlled, Sigfox

Keithley Model 238 High-Current Source-Measure Unit
Keithley Model 238 High-Current Source-Measure Unit

... Exercise extreme caution when a shock hazard is present. Lethal voltage may be present on cable connectorjacks or test fixtures. The American National Standards Institute (ANSI) states that a shock hazard exists when voltage levels greater than 30V RMS, 42.4V peak, or 60VDC are present. A good safet ...
4.5. Current Mode Instrumentation Amplifiers
4.5. Current Mode Instrumentation Amplifiers

seismometers calibration: comparison between a relative
seismometers calibration: comparison between a relative

LCL Interface Filter Design for Shunt Active Power Filters
LCL Interface Filter Design for Shunt Active Power Filters

... influence of the values of product L2C and of the two parameters (L2 and C) on the total harmonic distortion factor of the supply current allowed us to point out the following conclusions: 1. There is an optimum value of product L2C which leads to a minimum value of the current THD (Fig. 11). This o ...
Lecture 9 – Low Power Design
Lecture 9 – Low Power Design

Current Sensors Product Range Guide
Current Sensors Product Range Guide

... Product reliability. Industry knowledge. Expertise. Standard with every order. With more than 50,000 sensing, switching, and control products ranging from snap-action, limit, toggle, and pressure switches to position, speed, pressure, and airflow sensors, Honeywell Sensing and Control has one of the ...
On the selection and installation of surge protection devices in a TT
On the selection and installation of surge protection devices in a TT

œmнjaд, 26.0
œmнjaд, 26.0

2016 A- 61 Lakshmi Cotton Factory Bajakhana, Distt. Bathinda
2016 A- 61 Lakshmi Cotton Factory Bajakhana, Distt. Bathinda

LLCL Grid-Connected Inverters Paper Min Huang
LLCL Grid-Connected Inverters Paper Min Huang

MAX9317/MAX9317A/MAX9317B/MAX9317C Dual 1:5 Differential Clock Drivers with LVPECL Inputs and LVDS Outputs
MAX9317/MAX9317A/MAX9317B/MAX9317C Dual 1:5 Differential Clock Drivers with LVPECL Inputs and LVDS Outputs

... Note 1: Measurements are made with the device in thermal equilibrium. Note 2: Current into a pin is defined as positive. Current out of a pin is defined as negative. Note 3: DC parameters are production tested at +25°C. DC limits are guaranteed by design and characterization over the full operating ...
slides from group 2
slides from group 2

... contributions, which is not possible with current AFM ...
Recovery of dielelectric strength of expulsion fuses after arc current
Recovery of dielelectric strength of expulsion fuses after arc current

TPS386596 Quad Reset Supervisor With Manual Reset Input (Rev. A)
TPS386596 Quad Reset Supervisor With Manual Reset Input (Rev. A)

this Manual - Blue Sky Energy Inc.
this Manual - Blue Sky Energy Inc.

... h) Be extra cautious to reduce risk of dropping metal tool onto battery. It might spark or short circuit battery or other electrical part that may cause explosion. i) Remove personal metal items such as rings, bracelets and watches when working with a lead-acid battery. A lead-acid battery can produ ...
www .wpiinc.com - World Precision Instruments
www .wpiinc.com - World Precision Instruments

... linear output voltage vs ...
Presentation – Germicidal Lamps Basics 2013
Presentation – Germicidal Lamps Basics 2013

March 2008
March 2008

The role of input chirp on phase shifters based on slow
The role of input chirp on phase shifters based on slow

MAX107 Dual, 6-Bit, 400Msps ADC with On-Chip, Wideband Input Amplifier General Description
MAX107 Dual, 6-Bit, 400Msps ADC with On-Chip, Wideband Input Amplifier General Description

... Note 2: Input offset is the voltage required to cause a transition between codes 0 and -1. Note 3: Numbers provided are for DC-coupled case. The user has the choice of AC-coupling, in which case, the DC input voltage level does not matter. Note 4: The peak-to-peak input voltage required, causing a f ...
LT5557 - 400MHz to 3.8GHz 3.3V Active Downconverting Mixer.
LT5557 - 400MHz to 3.8GHz 3.3V Active Downconverting Mixer.

... GND (Pins 9, 12): Ground. These pins are internally connected to the backside ground for improved isolation. They should be connected to the RF ground on the circuit board, although they are not intended to replace the primary grounding through the backside contact of the package. ...
Table of Contents - Industrial Manufacturing
Table of Contents - Industrial Manufacturing

Ch9-12
Ch9-12

...  Since the input to Q1 and Q2 rises and falls by the same amount, and their bases are tied together, the rise in IC1 has the same magnitude as the fall in IC2. CH 10 Differential Amplifiers ...
< 1 ... 253 254 255 256 257 258 259 260 261 ... 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