• 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
Restoration of a 1951 RCA-Victor Model X-711 AM
Restoration of a 1951 RCA-Victor Model X-711 AM

Clamp-on Meters
Clamp-on Meters

... • Inspect the test leads or accessory before use. They must be clean and dry, and the insulation must be in good condition. • Use this unit for the manufacturer’s intended purpose only, as described in this manual. Any other use can impair the protection provided by the unit. Failure to observe thes ...
6100B/6105A Electrical Power Standards Extended Specifications
6100B/6105A Electrical Power Standards Extended Specifications

... for sinusoidal waveforms. Few systems can match the 0.007 % (66 ppm) one year energy accuracy provided by the 6105A for sinusoidal waveforms. Waveforms with high harmonic distortion are delivered with similar accuracy traceable to national and international standards. Choosing between a 6100B or 610 ...
A Fully Integrated CMOS Phase-Locked Loop With 30MHz to 2GHz
A Fully Integrated CMOS Phase-Locked Loop With 30MHz to 2GHz

87KB - IEEE International Reliability Innovations Conference
87KB - IEEE International Reliability Innovations Conference

... Abstract—This paper studies the reliability of sampling circuit in Analog to Digital Convertor (ADC) systems with respect to transistor aging effects. The main concentration in this study is current leakage and the effects of aging on current leakage. The sampling circuit in ADC system suffers from ...
ADS1209 数据资料 dataSheet 下载
ADS1209 数据资料 dataSheet 下载

... The ADS1209 is a two-channel, high-performance, delta-sigma (ΔΣ) modulator with an 86dB dynamic range, operating from a single +5V supply. The differential inputs are ideal for direct connection to signal sources in an industrial environment. With the appropriate digital filter and modulator rate, t ...
OPA2832
OPA2832

PWM, Step-Down DC-to-DC Controller with Margining and Tracking ADP1822
PWM, Step-Down DC-to-DC Controller with Margining and Tracking ADP1822

... converter switching frequency to the applied signal. The maximum SYNC frequency is limited to 2× the nominal internal frequency selected by FREQ. Do not leave SYNC unconnected; when not used, connect SYNC to GND. Frequency Select Input. FREQ selects the converter switching frequency. Drive FREQ low ...
RT5007 - Richtek
RT5007 - Richtek

MAX5976A/MAX5976B 2.7V to 18V, 7A, Hot-Swap Solution General Description Features
MAX5976A/MAX5976B 2.7V to 18V, 7A, Hot-Swap Solution General Description Features

... overcurrent condition, the faster the response time allowing the devices to tolerate load transients and noise near the circuit-breaker threshold. The ICs also feature catastrophic short-circuit protection. During normal operation, if OUT is shorted directly to ground, a fast protection circuit forc ...
EcoSpeedTM Step-down Controller with I2C Interface
EcoSpeedTM Step-down Controller with I2C Interface

... controller. Additionally, a status register provides information on device state and faults. The controller is capable of operating with all ceramic solutions and switching frequencies up to 1MHz. The programmable frequency and selectable power save mode offer the flexibility to optimize the control ...
Modeion - OEZ sro
Modeion - OEZ sro

RB471E
RB471E

Kenya Certificate of Secondary Education
Kenya Certificate of Secondary Education

... Explain what happens to the iron fillings. ...
The RC Circuit: An Approach with Fourier Transforms In this article
The RC Circuit: An Approach with Fourier Transforms In this article

Pulse Testing for Nanoscale Devices
Pulse Testing for Nanoscale Devices

... as generating clock signals and simulating repeating control lines such as in memory read and write cycles. Current pulsing is very similar to voltage pulsing. In this method, a specified current pulse is applied to the DUT and the resulting voltage across the device is measured. Current pulsing is ...
BG26386390
BG26386390

... implement a given function. Since circuits are differential complementary data inputs and outputs are available which eliminates the need for inverters. The design is very modular, all gates use the same topology only the inputs are permuted which makes the design of cell library very simple. The di ...
LT1739 - Dual 500mA, 200MHz xDSL Line Driver Amplifier
LT1739 - Dual 500mA, 200MHz xDSL Line Driver Amplifier

... line driving back termination resistors. With this termination, while a DSL port is not transmitting data, it can still sense a received signal from the line across the backtermination resistors and respond accordingly. The two logic input control provides two intermediate (approximately 7mA per amp ...
C7804 Electric Components newer
C7804 Electric Components newer

... electronic “one way street”. Diodes have polarity. They have two terminals known as the cathode (C) and the anode (A). The diode allows current to flow through it only when the cathode is negative and the anode is positive. The figure shows several types of diodes in common use in electronic circuit ...
ADP1829 数据手册DataSheet 下载
ADP1829 数据手册DataSheet 下载

... voltage and is sized to handle large MOSFETs for point-of-load regulators. The two channels operate 180° out of phase, reducing stress on the input capacitor and allowing smaller, low cost components. The ADP1829 is ideal for a wide range of high power applications, such as DSP and processor core I/ ...
AP7363 Description Pin Assignments
AP7363 Description Pin Assignments

... The output capacitor is required to stabilize and help the transient response of the LDO. The AP7363 is stable with any type of capacitor, with no limitations on minimum or maximum ESR. The device is designed to have excellent transient response for most applications with a small amount of output ca ...
Instruction Manual - Fuji Electric Europe
Instruction Manual - Fuji Electric Europe

... RCD: Residual-current-operated protective device ELCB: Earth leakage circuit breaker Note: A box ( ) in the above table replaces A or E depending on the shipping destination. For three-phase 200 V class series of inverters, it replaces A. *1 The frame size and model of the MCCB or RCD/ELCB (with ove ...
MAXX-LINK MLX-100
MAXX-LINK MLX-100

... - Turn the audio system on, turn the volume all the way down, and ensure that there is no audio CD in your CD player. - Start off with the input LEVEL(gain) settings of the 4 amplifiers at top dead center, or the 12 o’clock position. - While measuring the Voltage AC on amplifier #1, continue adjusti ...
TP15900-4
TP15900-4

... parallel on the same remote alarm bus, the total available remote alarm circuit current will be evenly divided between each of the LED’s. For example, if three fuses blow, each LED, indicating the presence of a blown fuse, will conduct approximately 10 mA each, assuming the total available remote al ...
TPS62750 数据资料 dataSheet 下载
TPS62750 数据资料 dataSheet 下载

... USB powered portable applications. It can provide up to 1300mA average input current and is ideal for applications connected to a USB host. With an input voltage range of 2.9 V to 6.0V, the device supports batteries with extended voltage range and is ideal for powering USB applications where USB com ...
< 1 ... 958 959 960 961 962 963 964 965 966 ... 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