• 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
Proportionality, Superposition, Thévenin, and
Proportionality, Superposition, Thévenin, and

2SK3018
2SK3018

IN
IN

... a. The Question Booklet Code printed at the right hand top corner of this page does not match with the Question Booklet Code at the right hand top corner of the ORS or b. The Question Paper Code preceding the Registration number on the ORS is not IN, then exchange the booklet immediately with a new ...
BP5728
BP5728

... (VDD=15V, Vd=15V,IFB=0.1mA,SW1=R1,Ta=25°C, unless otherwise specified) ...
Ohm`s Law
Ohm`s Law

... Press Esc ( ) and use the arrow keys to select the first cell under ‘voltage (v)’. Press F2 to make the cell active for editing. Use the alphanumeric keys to enter your first value of Voltage from your Data Table. Press to activate your entry (and automatically select the next cell in the column). ...
Thevenin
Thevenin

Building Operator Certification * Level I for TSTF 32BJ
Building Operator Certification * Level I for TSTF 32BJ

TPS40002/3 Controllers Enable BUCK
TPS40002/3 Controllers Enable BUCK

... To meet this requirement with the lowest size and cost, a single 22-µF, X5R ceramic capacitor can be considered. Although these capacitors have an extremely small resistance, the datasheet indicates that the part undergoes a 30_C temperature rise with 2-ARMS current at 500 kHz. With VIN = 3.0 V, our ...
doc - Design Group
doc - Design Group

... For this calculation the current draw from above may be used as a starting spot but it is assumed that this maximum current draw will be done for very short durations (5 minute games, conservative 6 games). This means that the full 510mA will be drawn for only ½ hour of the eight total hours. For th ...
Effects of Device Variations on the EMI Potential of High
Effects of Device Variations on the EMI Potential of High

... device parameters at worst case values and the data signal is calculated with the HSPICE model. These parameters values are given in Table III. In Figure 10, for each harmonic peak in the spectrum, the ...
1 1. CONCEPT “UcD” stands for “Universal class D amplifier”. This is
1 1. CONCEPT “UcD” stands for “Universal class D amplifier”. This is

... at lower frequencies is not hard to do (class D amplifiers delivering 0.005% at 1kHz were already on the market) but sound quality would actually be worse off. ...
The Process
The Process

How a Dimmer Works
How a Dimmer Works

Leakage current considerations in automobile battery voltage
Leakage current considerations in automobile battery voltage

... voltmetersmaking having it The MR8741 exhibits unusually high input impedance for a voltmeter, input impedance around 1 MΩ. significantly more sensitive to abrupt minute current variations than common logger voltmeters having input impedance around 1 MΩ. ...
How to select external components for DC/DC Converters
How to select external components for DC/DC Converters

Typical Application Diagram
Typical Application Diagram

... QX5241 is a step-down high-brightness LED constant-current driver with high accuracy. A high-side current-sense resistor adjusts the output current, which minimizes the number of external components while delivering an LED current with ±1% accuracy, and a dedicated PWM input (DIM) makes a wide range ...
A Wide Tuning Range Voltage-Controlled Ring Oscillator dedicated
A Wide Tuning Range Voltage-Controlled Ring Oscillator dedicated

ADD CURRENT LIMIT TO THE BUF634
ADD CURRENT LIMIT TO THE BUF634

Underlying Principles - Sample H/L Question
Underlying Principles - Sample H/L Question

... Analogue signal: An analogue signal can vary continually between high and low values. A voltage signal responding to changes in temperature is an example. ...
AMS2596 数据手册DataSheet 下载
AMS2596 数据手册DataSheet 下载

... • High-efficiency step-down (buck) regulator • High-efficiency Pre-regulator for Linear regulator ...
BD238
BD238

... with “Base Island” layout. The resulting transistor ...
Skill Sheet 7-A Using an Electric Meter
Skill Sheet 7-A Using an Electric Meter

... What do you measure in a circuit and how do you measure it? This skill sheet gives you useful tips to help you use an electric meter and understand electrical measurements. ...
Study Notes for Test 1
Study Notes for Test 1

... When intensifying screens are used, 40 times less radiation is needed this is both cost efficient and safer for the patient. 4. What controls the energy of xray protons? Speeds of electrons 5. What effect does voltage have on the electrons? Voltage determines the direction of flow and speed of elect ...
AVOP-ELEKTRO-SKA-010
AVOP-ELEKTRO-SKA-010

... Residual current device is an electrical device used for increased protection against injury caused by an electric current. It can‘t be used for basic protection – by automatic disconnection. Working wires are conducted through RCD, protective conductor mustn't be conducted through this device. It ...
Chapter 4
Chapter 4

< 1 ... 1808 1809 1810 1811 1812 1813 1814 1815 1816 ... 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