• 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
TDK-Lambda - SitesPlus
TDK-Lambda - SitesPlus

LV8806QA - ON Semiconductor
LV8806QA - ON Semiconductor

... Capacitor connection pin for setting boot frequency. Make sure to connect a capacitor of 500pF to 2200pF (recommendation) between this pin and GND. The capacitor is required to determine boot frequency to start motor. How to define capacitance: The capacitance should allow the shortest boot time for ...
M106N SERIES
M106N SERIES

IMH21
IMH21

... Parameter ...
application note u-129 uc3907 load share ic
application note u-129 uc3907 load share ic

... are easily paralleled for higher current applications. If special provisions are not made to equally distribute the load current among the paralleled supplies, then one or more units will hog the load current leaving the other units essentially idle. This results in greater thermal stresses on speci ...
MAX15059 76V, 300mW Boost Converter and Current Monitor for APD Bias Applications
MAX15059 76V, 300mW Boost Converter and Current Monitor for APD Bias Applications

MAX6613 Low-Voltage Analog Temperature Sensor in an SC70 Package General Description
MAX6613 Low-Voltage Analog Temperature Sensor in an SC70 Package General Description

... its own die temperature must be mounted on, or close to, the object whose temperature it is intended to measure. Because there is a good thermal path between the package’s metal lead and the IC die, the MAX6613 can accurately measure the temperature of the circuit board to which it is soldered. If t ...
Model #: APSINT2424 - uniscan power systems
Model #: APSINT2424 - uniscan power systems

Quasi-Resonant Full-Wave Zero-Current Switching Buck
Quasi-Resonant Full-Wave Zero-Current Switching Buck

... converter, conventional buck converter can be worked with resonant by connecting a series inductor to the switch utilized in the input and a parallel capacitor to the output diode. While a unidirectional switching device is used in half-wave quasiresonant converter, bidirectional switching device is ...
Monitoring DC anode current of a grounded
Monitoring DC anode current of a grounded

History of Frequency Modulation - Hik
History of Frequency Modulation - Hik

MODEL: M6DVS
MODEL: M6DVS

... Thank you for choosing M-System. Before use, please check contents of the package you received as outlined below. If you have any problems or questions with the product, please contact M-System’s Sales Office or representatives. ...
EPF 230V/16A-S EPF 230V/35A-S
EPF 230V/16A-S EPF 230V/35A-S

... Ohms resistant, inductive resistant (differential mode and common mode filter). By these, a low-pass behaviour is achieved. The SPDs are fitted with a thermal protection NC contact, which respond if the varistor exceed a certain level of temperature due to thermal overload. These thermal protection ...
L6699: Enhanced high-voltage resonant controller
L6699: Enhanced high-voltage resonant controller

BD9870FPS
BD9870FPS

common random-noise source
common random-noise source

Lab 3 Series and Parallel Circuits
Lab 3 Series and Parallel Circuits

... 6) The wire you removed had two ends. Connect your black probe to where one end of the wire was connected. 7) Connect the red probe to where the other end of the wire was connected. 8) Verify that your current is below 0.2 amps (200 milliamps). This is a rough measurement and should not be recorded ...
Etendue - USAI Lighting
Etendue - USAI Lighting

... is often different from the voltage at the input, but the currents through the primary and secondary windings will adjust such that the product of volts and amps remains constant. For example, a transformer with a 100 V, 10 A input may have a 50 V 20 A output. The product of 100 x 10 is the same as ...
1.8-V, 7-MHz, 90-dB CMRR, SINGLE-SUPPLY, RAIL-TO-RAIL I/O OPERATIONAL AMPLIFIER OPA2364-Q1 FEATURES
1.8-V, 7-MHz, 90-dB CMRR, SINGLE-SUPPLY, RAIL-TO-RAIL I/O OPERATIONAL AMPLIFIER OPA2364-Q1 FEATURES

... The OPA2364 and OPA4364 are high-performance CMOS operational amplifiers optimized for low-voltage single-supply operation. These miniature low-cost amplifiers are designed to operate on single supplies from 1.8 V (±0.9 V) to 5.5 V (±2.75 V). Applications include sensor amplification and signal cond ...
1. Introduction - About the journal
1. Introduction - About the journal

AND8309 - Trends in Integrated Circuits that Affect ESD Protection
AND8309 - Trends in Integrated Circuits that Affect ESD Protection

07EDCTransistorsOiho..
07EDCTransistorsOiho..

A Breakdown Voltage Multiplier for High Voltage Swing Drivers
A Breakdown Voltage Multiplier for High Voltage Swing Drivers

... driver, for output voltages over 3 Vpp, has been primarily done in compound semiconductors [7]–[11]. This is mainly due to breakdown limitations of silicon transistors and large required voltage swings of today’s high-speed optical modulators. Furthermore, the process technology disparity between th ...
BD8143MUV : Power Management ICs
BD8143MUV : Power Management ICs

series circuit.
series circuit.

... • The total resistance to current in the circuit is the sum of the individual resistances along the circuit path. • The current is equal to the voltage supplied by the source divided by the total resistance of the circuit. This is Ohm’s law. • The voltage drop, or potential difference, across each d ...
< 1 ... 1143 1144 1145 1146 1147 1148 1149 1150 1151 ... 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