• 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
Select Core Material
Select Core Material

... Step 8: Select Conductors PExprt contains five conductor types, depending on the geometry chosen (concentric, planar, or ...
In Class Lab 5 - Types of Circuits 2
In Class Lab 5 - Types of Circuits 2

... 1. Build a circuit with two batteries, a switch, and three bulbs as shown in the diagram. 2. Close the switch and measure the voltage across the battery. All three bulbs are lit. 3. Measure the voltage across each bulb by touching the leads of the meter to the terminals of each bulb separately. 4. S ...
department of electrical engineering
department of electrical engineering

... In Real Diode on the other hand, there are more characteristics to consider. When Reversed biased, a leakage current is occurred because the semiconductor depletion region has very large resistance. The same happens for positive but not high enough biasing voltage, but when barring voltage is exceed ...
6001 power amplifier - Peavey Commercial Audio
6001 power amplifier - Peavey Commercial Audio

... speaker load from output short circuits, DC voltage on outputs, and thermal overload. The amplifier shall include circuitry to gradually increase gain to attenuator setting levels when the amplifier is turned on, and circuitry for impedance sensing and clip limiting. The amplifier shall have a volta ...
voltage fluctuations in ic power supply distribution
voltage fluctuations in ic power supply distribution

... drops may appear in the voltage power supply network of digital circuits. For short radius dominions, like functional units or even small cores the spatial voltage fluctuations may be considered negligible. This is the typical assumption in most of the research works [9,10,11,12], the voltage fluctu ...
Slide 1
Slide 1

Document
Document

... change in the resistance of a conductor, is made of platinum and has a resistance of 50.0 W at 20oC. When the device is immersed in a vessel containing melting indium, its resistance increases to 76.8 W. Find the melting point of Indium. ...
R = L / A.
R = L / A.

... (a) If each wire must be 20 m long, what diameter copper wire should you use to make the resistance 0.10  per wire. R = L / A A = L / R A =  (d/2)2  (d/2)2 = L / R ...
Automatic Routine Speeds Power-Supply
Automatic Routine Speeds Power-Supply

doc - Rutgers Engineering
doc - Rutgers Engineering

... completely different circuit between the nodes that are being replaced by the thevenin circuit. In this lab, we will be using the Thevenin circuit to model the waveform generator output circuit. As you might expect, the function generator internal circuitry is much more complex than that of Figure 1 ...
safe-test point
safe-test point

to notes15
to notes15

... at the meter. Maintaining acceptable service voltage is the distribution company’s responsibility.  Utilization voltage: The voltage at the line terminals of utilization equipment. This voltage is the facility’s responsibility. Equipment manufacturers should design equipment which operates satisfac ...
Geiger Mode Avalanche Photodiode with CMOS Transimpedance
Geiger Mode Avalanche Photodiode with CMOS Transimpedance

Differential Voltage Probe Instruction Sheet
Differential Voltage Probe Instruction Sheet

... workmanship for one year from the date of purchase. This warranty does not cover fuses, disposable batteries or damage from accident, neglect, misuse or abnormal conditions of operation or handling. Resellers are not authorized to extend any other warranty on Fluke’s behalf. To obtain service during ...
IZhO 2015 Exp_eng - International Zhautykov Olympiad
IZhO 2015 Exp_eng - International Zhautykov Olympiad

LM3915 Dot/Bar Display Driver
LM3915 Dot/Bar Display Driver

... The LM3915 is a monolithic integrated circuit that senses analog voltage levels and drives ten LEDs, LCDs or vacuum fluorescent displays, providing a logarithmic 3 dB/step analog display. One pin changes the display from a bar graph to a moving dot display. LED current drive is regulated and program ...
In-Class Worksheet #4
In-Class Worksheet #4

INSTALLATION AND SAFETY INSTRUCTIONS HC-221
INSTALLATION AND SAFETY INSTRUCTIONS HC-221

Poster - Technology Supplies
Poster - Technology Supplies

... The simplest complete circuit is a piece of wire from one end of a battery to the other. The electric current can flow but nothing useful happens. The wire just gets hot and the battery goes flat. To do something useful with the electric current, we need to put an electrical component into the circu ...
Maximizing DER Hosting Capacity of LV and MV Networks (Webinar
Maximizing DER Hosting Capacity of LV and MV Networks (Webinar

Dynam o - Bastl Instruments
Dynam o - Bastl Instruments

... negative voltage as soon as the EF OUT signal reaches the threshold voltage. This negative voltage is a curve derived from the EF OUT so it is proportional to the loudness of the signal. The indication LED shows when there is a negative CV output. The more negative the CV is, the brighter the LED. I ...
PPT - Dept. of Electrical and Computer Engineering
PPT - Dept. of Electrical and Computer Engineering

... The transmission line model, peak detector and error amplifier building blocks for on-chip matching component of the Ethernet communication system are scratched out. It will connect to a A/D converter and a control part to adjust the ends capacitances in the transmission line stage. ...
21676 Select test equipment and test an automotive
21676 Select test equipment and test an automotive

... include but are not limited to the current version of including updated amendments to, and replacements of – Health and Safety at Work Act 2015. ...
11.9 CIRCUIT ANALYSIS
11.9 CIRCUIT ANALYSIS

document
document

< 1 ... 1463 1464 1465 1466 1467 1468 1469 1470 1471 ... 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