• 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
NCN49597 - Power Line Communication Modem
NCN49597 - Power Line Communication Modem

... 14. With the level control register set for maximal output amplitude. Tested with low pass filter tuned for CENELEC D−band. 15. This parameter will not be tested in production. 16. A sinusoidal signal of 100 mVpp is injected between VDDA and VSSA while the digital AD converter generates an idle patt ...
pptx
pptx

1. (10%) A PMOS transistor has Vs = 1.5 V , Vd = .9 V. Vg = .2 V
1. (10%) A PMOS transistor has Vs = 1.5 V , Vd = .9 V. Vg = .2 V

... does not change. In a PMOS transistor if the source terminal is at a lower potential compared with the body, the transistor has body-effect and the threshold increases. If the source terminal is at a higher potential compared with the body, the transistor does not have body effect and the threshold ...
A - Rockwell Automation
A - Rockwell Automation

... 6. The drive manufacturer shall have not less than ten years of experience in the manufacture of drives in the United States. 7. The drives shall be rated for constant or variable torque applications (460V - 1 HP to 150 HP), depending on the individual driven load requirements. 8. Power Line Conside ...
Second Order Circuits I
Second Order Circuits I

AN5326, Using the Programmable Gain Amplifier in the S12ZVLA
AN5326, Using the Programmable Gain Amplifier in the S12ZVLA

... Information in this document is provided solely to enable system and software implementers to use NXP products. There are no express or implied copyright licenses granted hereunder to design or fabricate any integrated circuits based on the information in this document. NXP reserves the right to mak ...
Servo Reverser - Hobbielektronika.hu
Servo Reverser - Hobbielektronika.hu

Feature Selection/Extraction for Classification Problems
Feature Selection/Extraction for Classification Problems

... An electric field is created which results in a voltage drop across the region – called the barrier voltage or built-in potential ...
BD6383EFV
BD6383EFV

... dissipation. The back metal is shorted with the back side of the IC chip, being a GND potential, therefore there is a possibility for malfunction if it is shorted with any potential other than GND, which should be avoided. Also, it is recommended that the back metal is soldered onto the GND to short ...
File
File

... conduction. Turn-off must be achieved in the anode-to-cathode circuit. There are three ways in which turn-off, or commutation as it is commonly called, can be achieved by: (1) reversing the anode-to-cathode voltage; (2) reducing the anode current below the holding current level; (3) forcing current ...
Annex C: Bid Submission Forms
Annex C: Bid Submission Forms

... 7 The Bidder shall fill in this Form in accordance with the instructions. Apart from providing additional information, no alterations to its format shall be permitted and no substitutions shall be accepted. ...
Question Bank - International Virtual University Campus
Question Bank - International Virtual University Campus

150-W, 86% High-Efficiency Primary Side Regulated DCM/CCM
150-W, 86% High-Efficiency Primary Side Regulated DCM/CCM

MT-090 TUTORIAL Sample-and-Hold Amplifiers
MT-090 TUTORIAL Sample-and-Hold Amplifiers

... The sample-and-hold amplifier, or SHA, is a critical part of most data acquisition systems. It captures an analog signal and holds it during some operation (most commonly analog-digital conversion). The circuitry involved is demanding, and unexpected properties of commonplace components such as capa ...
NCP1422LEDGEVB NCP1422 High Current LED Driver Evaluation Board User's Manual
NCP1422LEDGEVB NCP1422 High Current LED Driver Evaluation Board User's Manual

... are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marki ...
Electrolysis from Stray DC Current
Electrolysis from Stray DC Current

... traction substations spaced every 5 km to 15 km along the tracks. The current required to operate the train traction motors is received by the train pantograph from the contact wire, and then it returns to the traction substations via the wheels of the train and the unearthed track system. The overh ...
MMA6270QT, ±1.5 g - 6 g Dual Axis Low-g Micromachined
MMA6270QT, ±1.5 g - 6 g Dual Axis Low-g Micromachined

Winding Resistance Testing WRT-10
Winding Resistance Testing WRT-10

Development of 14 Gbit/s Uncooled TOSA with
Development of 14 Gbit/s Uncooled TOSA with

... We designed the new package to have differential signal transmission lines of 50 Ω characteristic impedance. The frequency characteristics were compared with those of the conventional coaxial-type package. The following describes the results. 4-1 Frequency characteristic In conventional packages, an ...
EE462 Principles of Mobile Robots Autumn 2000
EE462 Principles of Mobile Robots Autumn 2000

... How do you choose one type of device rather than the other? • Photocells are easy to work with, because electrically they are just resistors, but their response time is slow compared to the photodiode or phototransistor’s semiconductor junction. This means photocells are suitable for detecting level ...
512 X 18 First-In, First-Out
512 X 18 First-In, First-Out

A Lecture on Improve Power Quality Converters
A Lecture on Improve Power Quality Converters

ZXMS6004FF Product Summary Features and Benefits
ZXMS6004FF Product Summary Features and Benefits

... High Level Input Voltage for MOSFET to be on Low level input voltage for MOSFET to be off Peripheral Supply Voltage (voltage to which load is referred) ...
Power Electronic Modelling and Emulation of an Electrostatic
Power Electronic Modelling and Emulation of an Electrostatic

MAX3030E–MAX3033E ±15kV ESD-Protected, 3.3V Quad RS-422 Transmitters General Description
MAX3030E–MAX3033E ±15kV ESD-Protected, 3.3V Quad RS-422 Transmitters General Description

... this, the MAX3030E–MAX3033E have hot-swap capable inputs. When a circuit board is plugged into a “hot” backplane, there is an interval during which the processor is going through its power-up sequence. During this time, the processor’s output drivers are high impedance and are unable to drive the en ...
< 1 ... 513 514 515 516 517 518 519 520 521 ... 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