• 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
Class D Audio Amplifiers
Class D Audio Amplifiers

SBB-2082S 数据资料DataSheet下载
SBB-2082S 数据资料DataSheet下载

... responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents, or other rights of third parties, resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change comp ...
OPA683 Very Low-Power, Current Feedback OPERATIONAL AMPLIFIER With Disable FEATURES
OPA683 Very Low-Power, Current Feedback OPERATIONAL AMPLIFIER With Disable FEATURES

ZXLD1360 Description Pin Assignments Features Typical
ZXLD1360 Description Pin Assignments Features Typical

... Device operation (refer to Figure 1 - Block diagram and Figure 2 Operating waveforms) Operation can be best understood by assuming that the ADJ pin of the device is unconnected and the voltage on this pin (VADJ) appears directly at the (+) input of the comparator. When input voltage VIN is first app ...
Asynchronous machine
Asynchronous machine

... Assume three-phase wound-rotor induction machine • Cage winding can be represented by an equivalent three-phase winding • At steady-state the magnetic fields rotate at synchronous speed • Resultant air gap field induce voltages in stator and rotor windings • Supply frequency f1 in stator • slip freq ...
Chapter 5- Oscillloscope
Chapter 5- Oscillloscope

Distributed generation and voltage changes in a distribution network
Distributed generation and voltage changes in a distribution network

EE316_5
EE316_5

02 Guided notes material
02 Guided notes material

OPAx277 High Precision Operational Amplifiers
OPAx277 High Precision Operational Amplifiers

A High-Accuracy Electronic Pressure Transducer with a Wide
A High-Accuracy Electronic Pressure Transducer with a Wide

... recommendations for optimum performance. The SX15 transducer, IC2, is driven by a programmable current source, IC3, the value of which current is set by resistors R2, R3 and the voltage at the output pin 1 of op-amp IC4A. These components are also used to match the temperature coefficient of the cur ...
FM Receiver For 137 - 141MHz
FM Receiver For 137 - 141MHz

... of rather low quality, nevertheless, they started an era of space research of the Earth’s surface. The resolving power of todays images is currently of the order 1 pixel = 1 m. You can find more detailed information on the internet pages of the NOAA agency http://www.earth.nasa.gov/history/tiros/tir ...
Dual MicroPower LinCMOS Voltage
Dual MicroPower LinCMOS Voltage

... CMOS circuits are prone to gate oxide breakdown when exposed to high voltages even if the exposure is only for very short periods of time. Electrostatic discharge (ESD) is one of the most common causes of damage to CMOS devices. It can occur when a device is handled without proper consideration for ...
ISKRA Model E895G2 Electricity Meter
ISKRA Model E895G2 Electricity Meter

... This approval becomes subject to review on 1 September 2006, and then every 5 years thereafter. Instruments purporting to comply with this approval shall be marked NSC No 14/2/6 and only by persons authorised by the submittor. It is the submittor’s responsibility to ensure that all instruments marke ...
Effects of Total Harmonic Distortion on Power System
Effects of Total Harmonic Distortion on Power System

Band Gap Energies of Silicon and Germanium
Band Gap Energies of Silicon and Germanium

... ter handles uncertainty associated with the vertical axis variable. This must be done because of our inability to easily calibrate our temperature values during thermal equilibrium (Fig. (3)). To measure T , we use thermocouples that are epoxied to our diodes. LabPro lets us read out the temperature ...
Aalborg Universitet A generic inertia emulation controller for multi-terminal VSC-HVDC systems
Aalborg Universitet A generic inertia emulation controller for multi-terminal VSC-HVDC systems

Design Guide for QR Flyback Converter
Design Guide for QR Flyback Converter

... Choose the right controller considering the output power requirement: A free running QR control would result in high losses with decreasing loads because of increased frequency. Some controllers place a limit on the maximum frequency, resulting in FF DCM mode at a certain point. This effectively lim ...
Tech Note 4/16 Meg-alert VFD and Solid State Soft Starter
Tech Note 4/16 Meg-alert VFD and Solid State Soft Starter

Latchable Negative Floating Hot Swap Power
Latchable Negative Floating Hot Swap Power

ZM013666670
ZM013666670

... settling performance of the gain-boosted op amp [3] and the effort of pushing up the doublet can raise stability problem [4]. For high gain, the architecture of a single stage amplifier with gain-boosted amplifier is a nice choice compare to telescopic topology. However, the folded-cascode topology ...
LEDs: Everything You Wanted to Know
LEDs: Everything You Wanted to Know

... law predicts that the number of transistors in a dense integrated circuit doubles approximately every two years. However, this doesn’t apply only to integrated circuits; Moore’s law is also reflected in Light Emitting Diode (LED) technology. An LED is made up of many small dies. The same advancement ...
MAX77271 Multimode PA Step-Down Converter with Linear Bypass Mode General Description
MAX77271 Multimode PA Step-Down Converter with Linear Bypass Mode General Description

... powering the power amplifier (PA) in multistandard handsets such as LTE, WCDMA, TD-SCDMA, GSM, and EDGE. The device integrates a high-efficiency PWM stepdown converter for medium- and low-power transmission with an 85mΩ (typ) low dropout (LDO) bypass regulator, in parallel with the step-down convert ...
View
View

... ilsment of the bulb is necessary to start and to maintain rectification. To provide this emlsslon, the filament 1$ heated by passing current through the wire, which consumes between 10 and 60 watts depending upon the size of the bulb. After the bulb starts to rectify a bluehalo forms about the filam ...
ADP2102 数据手册DataSheet 下载
ADP2102 数据手册DataSheet 下载

... that converts a 2.7 V to 5.5 V unregulated input voltage to a lower regulated output voltage with up to 95% efficiency and 1% accuracy. The low duty cycle capability of the ADP2102 is ideal for USB applications or 5 V systems that power up submicron subvolt processor cores. Its 3 MHz typical operati ...
< 1 ... 977 978 979 980 981 982 983 984 985 ... 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