• 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
FJP5555 NPN Silicon Transistor FJP5555 — NPN Silicon T
FJP5555 NPN Silicon Transistor FJP5555 — NPN Silicon T

... Counterfeiting of semiconductor parts is a growing problem in the industry. All manufacturers of semiconductor products are experiencing counterfeiting of their parts. Customers who inadvertently purchase counterfeit parts experience many problems such as loss of brand reputation, substandard perfor ...
Accuracy versus Resolution - Scientific Devices Australia
Accuracy versus Resolution - Scientific Devices Australia

... system elements such as field sensors, actuators, signal conditioning modules (SCMs), and controlling units (PCs and PLCs). In addition, software algorithm integrity and operating system compatibility, or the degree of software “openness,” must be included in error budget considerations. For example ...
A) Resistance, Voltage and Current Measurement using Analog
A) Resistance, Voltage and Current Measurement using Analog

... Follow step-by-step procedure below to measure the value of each resistor. a) Turn your "Selector Knob" to X1K Resistance Measurement Range. b) Touch your RED PROBE and BLACK PROBE together. You will see your meter needle turn from ∞ to 0 Ω. Adjust your calibration knob until your meter needle preci ...
Circuit Note - Mouser Electronics
Circuit Note - Mouser Electronics

... The voltage generated by a thermocouple must be converted to temperature. Converting the voltage measured to an accurate temperature can be difficult, because the thermocouple voltage is small, the temperature-voltage relationship is nonlinear, and the cold junction temperature must also be accurate ...
BD95601MUV-LB
BD95601MUV-LB

... Frequency input. A resistor sets the switching frequency. The frequency can be set from 200kHz to 500kHz. Input Current Sense Amplifier input. FREQ pin is output. Output Current Sense Amplifier input. If the voltage between this pin and VOUT pin reaches the specified voltage level (setting at ILIM p ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)

... consumption achievable by tweaking both and subject to the constraint that the chips satisfy a target frequency. Even for technologies where the theoretical limit is not yet achievable using body biasing techniques or in cases where excessive forward bias at low degrades performance, it is still pos ...
2N5191 - Silicon NPN Power Transistors
2N5191 - Silicon NPN Power Transistors

... 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 ...
CP2102/9 - Silicon Labs
CP2102/9 - Silicon Labs

... The CP2102/9 is a highly-integrated USB-to-UART Bridge Controller providing a simple solution for updating RS232 designs to USB using a minimum of components and PCB space. The CP2102/9 includes a USB 2.0 fullspeed function controller, USB transceiver, oscillator, EEPROM or EPROM, and asynchronous s ...
RC - OCExternal
RC - OCExternal

ADG1311 数据手册DataSheet下载
ADG1311 数据手册DataSheet下载

FEBFL7701_L31H008A  7.8 W LED Ballast Using FL7701 Featured Fairchild Product:
FEBFL7701_L31H008A 7.8 W LED Ballast Using FL7701 Featured Fairchild Product:

... This document describes the proposed solution for an universal input, 2.4W LED ballast using the FL7701. The input voltage range is 187 VRMS – 264 VRMS and there is one DC output with a constant current of 250 mA at 31 VMAX. This document contains general description of FL7701, the power supply spec ...
Open-Winding Power Conversion Systems Fed by Half
Open-Winding Power Conversion Systems Fed by Half

... disadvantages of such a configuration include a higher total device VA rating and increased conduction loss as compared to a single Y/Δ-connected VSC. In certain ac–dc applications, such as telecommunications, wind, and aerospace generator drives, it is desired to have regulated input currents and o ...
1. Introduction
1. Introduction

... Digital isolation applications with primary side supply voltage VIN > 5.5 V or load power requirements of >2 W can use Si884xx/Si886xx products. These product’s dc-dc controller uses the isolated flyback circuit topology. The advantage of this topology when compared with the Si882xx/Si883xx is that ...
Printer Carriage Motion Control
Printer Carriage Motion Control

... Assembling the System As we have done in past expermiments, we will again construct the system in a modular way by building and testing pieces of the system as we go. This is always a good general approach in any kind of engineering, whether it be electronic work, system design, or computer programm ...
LM76 - Texas Instruments
LM76 - Texas Instruments

SECT_12_AtoD_DtoA - Advanced Microcomputer Systems
SECT_12_AtoD_DtoA - Advanced Microcomputer Systems

... o In practice, some combinations of DACs and microprocessors are easier than others and require much simpler hardware and software in the interface o Interfacing an 8-bit DAC to an 8-bit microprocessor is easy:  Write to port connected to DAC and signal DAC to begin o When DAC word > uP word, some ...
Analog/Mixed-Signal Circuits, Systems and Devices + TxACE
Analog/Mixed-Signal Circuits, Systems and Devices + TxACE

... Continued device scaling faces many issues: (1) increased susceptibility to soft errors such as energetic particle strikes, signal and power-supply noise coupling, and noisy device behavior, (2) hard errors from phenomena such as electro migration, device wear out, and aging (e.g. oxide breakdown, N ...
AN-610 - Fairchild
AN-610 - Fairchild

Lab 40 ELECTRICAL TRANSFORMERS
Lab 40 ELECTRICAL TRANSFORMERS

1. Digital I/O Types of Digital I/O Boards / Common Applications 3
1. Digital I/O Types of Digital I/O Boards / Common Applications 3

... In opto-coupler isolation output circuits the output transistor emitter serves as the output terminal. The internal logic is [ON(short):1, OFF(open):0]. With source type, when an output transistor is ON (load being applied), the electric current will flow from an output terminal to the load. Due to ...
Keywords: simulation, short
Keywords: simulation, short

OVER-VOLTAGE AND OVER-CURRENT PROTECTION IC (Rev. B)
OVER-VOLTAGE AND OVER-CURRENT PROTECTION IC (Rev. B)

MAX686 DAC-Controlled Boost/Inverter LCD Bias Supply with Internal Switch General Description
MAX686 DAC-Controlled Boost/Inverter LCD Bias Supply with Internal Switch General Description

... less than 1V and the switch current limit is exceeded), the MAX686 operates in initial power-up mode, and the minimum off-time increases to 5µs to provide soft-start. The switching frequency, which depends on the load, the input voltage, and the output voltage, can be as high as 300kHz. ...
Bipolar Junction Transistors: Basics
Bipolar Junction Transistors: Basics

...  When light strikes the collector-base pn junction, a base current, Iλ, is produced that is directly proportional to the light intensity.  This action produces a collector current that increases with Iλ .  Except for the way base current is generated, the phototransistor behaves as a conventiona ...
Conversion of a Marconi Blue Cap LNB into a 3cms 30
Conversion of a Marconi Blue Cap LNB into a 3cms 30

< 1 ... 574 575 576 577 578 579 580 581 582 ... 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