• 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
VLT Series 2000/3000 Watt True Sine Wave Inverter
VLT Series 2000/3000 Watt True Sine Wave Inverter

... Before installing the inverter, be sure the main rocker switch is set to “OFF”. Use the ON/OFF/REMOTE main rocker switch on the front panel to turn the inverter ON. Set the rocker switch to the ON position to turn the inverter ON. Notice the beeps and the activity of the indicator light display. The ...
mems accelerometers
mems accelerometers

... as a change of capacitance and variation of each of the three variables has been used in MEMS sensing. For example, whereas chemical or humidity sensor may be based on a change of , accelerometers have been based on a change in d or in A. If the dielectric in the capacitor is air, capacitive sensin ...
Laser PCB Milling Machine - Department of Electrical Engineering
Laser PCB Milling Machine - Department of Electrical Engineering

... group are ARC members, and are tasked with keeping the machine repaired and running, we have found this to be an increasingly difficult task. In just the last year we have had to replace the lead screw, and are currently in the process of replacing the main spindle motor. These problems resulted fro ...
Rail-to-Rail Op Amp Design ( cont`d )
Rail-to-Rail Op Amp Design ( cont`d )

... We have to push gm2 to 2 times of its original value in previous case! It means more power, and may reach near the limitation of the process, that is we can only design an amplifier with 50% of the GBW that a specific process permits. Of course, we do not want either of these two! • So, transconduct ...
TEXAS INSTRUMENTS (TLC2933AIPW) PHASE
TEXAS INSTRUMENTS (TLC2933AIPW) PHASE

... TEST CONDITIONS RBIAS = 3.3 kΩ, VCO IN = 1/2 VDD ...
Safety precautions 1
Safety precautions 1

STM1810
STM1810

... STM181x devices are low power reset devices used to monitor power supplies for microcontrollers. They perform a single function: asserting a reset signal whenever VCC supply voltage drops below a preset value and keeping it asserted until VCC has risen above the preset threshold for a minimum period ...
Crown Amplifiers Catalog - Langley Sound and Light
Crown Amplifiers Catalog - Langley Sound and Light

... Control Modules: VCA-MC4A: VCA module for CTs 4200A. VCA-MC8: VCA module for CTs 8200. Wall-mount level control panels for use with VCA module: 1-VCAP: Single-gang panel with 1 VCA channel volume control. 4-VCAP: Two-gang panel with 4 VCA channel volume controls. T-170V: This is an autoformer that a ...
Superconducting Quantum Interference Devices
Superconducting Quantum Interference Devices

Measurement Methods for Calculation of the Direction to a Flicker
Measurement Methods for Calculation of the Direction to a Flicker

Presentation Title Here
Presentation Title Here

... Does not involve Parasitics, except input / output CAP ESR and ESL Only Related to CURRENT, not voltage For example, with the same power level Buck converter, lower input voltage means higher input current, thus worse conducted EMI ...
R.M.A. Dawson, Z. Shen, M.H. Lu, J.C. Sturm et al, "Design of an improved pixel for a polysilicon active-matrix organic LED display," Dig. Soc. Info. Display Inter. Symp. pp. 11-14 (1998).
R.M.A. Dawson, Z. Shen, M.H. Lu, J.C. Sturm et al, "Design of an improved pixel for a polysilicon active-matrix organic LED display," Dig. Soc. Info. Display Inter. Symp. pp. 11-14 (1998).

SV200 Manual1 - Columbus McKinnon
SV200 Manual1 - Columbus McKinnon

... in personal injury or loss of life. Handle the drive with the same care and caution as all other high voltage electrical components. • Be sure to disconnect all AC input power to the drive before servicing. Lock and tag the main switch in the de-energized position per ANSI Z 244.1. • Wait at least 3 ...
leakage power analysis and reduction for nanoscale circuits
leakage power analysis and reduction for nanoscale circuits

Merlin Gerin Masterpact Earthing Switch
Merlin Gerin Masterpact Earthing Switch

S225-10-4C
S225-10-4C

... PROCEDURE B: REGULATOR BYPASS DISCONNECT SWITCH 1. Verify from the regulator nameplate that the control circuit is connected for the proper regulated load voltage. 2. Set the CONTROL switch to MANUAL and the POWER switch to EXTERNAL. 3. The knife switches on the back panel should be set with the V1 ...
mfj enterprises, inc. - Classic International
mfj enterprises, inc. - Classic International

PTN3381D
PTN3381D

... AC-coupled differential input signals to DVI v1.0 and HDMI v1.4b compliant open-drain current-steering differential output signals, up to 3 Gbit/s to support 36-bit deep color, 3D and 3 Gbit/s modes. Each of these channels provides a level-shifting differential buffer to translate from low-swing AC- ...
High-Efficiency Low-Voltage Rectifiers for Power
High-Efficiency Low-Voltage Rectifiers for Power

Linear-Digital IC`s
Linear-Digital IC`s

10-Port Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control Features
10-Port Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control Features

... Expanders with PWM Intensity Control The tradeoff for LED intensity control is between depth of current-control resolution, noise constraints, and software complexity: • For high LED resolution where each LED needs individual intensity settings, use the 8-bit PWM control plus the 1-bit analog contro ...
ADP1043A 数据手册DataSheet 下载
ADP1043A 数据手册DataSheet 下载

... The ADP1043A is a secondary side power supply controller IC designed to provide all the functions that are typically needed in an ac-to-dc or isolated dc-to-dc control application. The ADP1043A is optimized for minimal component count, maximum flexibility, and minimum design time. Features include r ...
MAX31865 RTD-to-Digital Converter General Description Features
MAX31865 RTD-to-Digital Converter General Description Features

... with a 10kω reference resistor and a 0.1µF capacitor across the RTD inputs. Note 5: The first conversion after enabling continuous conversion mode takes a time equal to the single conversion time for the respective notch frequency. Note 6: Specified with no load on the bias pin as the sum of analo ...
PD62GB10_11_Digital multimeters and power analyzers DMG series
PD62GB10_11_Digital multimeters and power analyzers DMG series

High-Efficiency Low-Voltage Rectifiers for Power Scavenging Systems
High-Efficiency Low-Voltage Rectifiers for Power Scavenging Systems

< 1 ... 64 65 66 67 68 69 70 71 72 ... 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