• 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
Bipolar Transistor Epilayer Design Using the MAIDS Mixed-Level Simulator
Bipolar Transistor Epilayer Design Using the MAIDS Mixed-Level Simulator

... to IP3 for class A, we have mapped the results of Fig. 6 on ) characteristics in Fig. 7 as lines of constant IP3. the The onset of quasi-saturation (q.s.) and avalanche are indicated by dashed lines. Clearly, both the quasi-saturation region and the avalanche region are nonlinear regions, of little ...
Relays General information
Relays General information

... According to the U.S.A.S.I. (United States of America Standards Institute) a relay can be defined as: An electrically controlled device that opens and closes an electrical contact to effect the operation of other devices in the same or another circuit. Relays are an important factor in today's indus ...
Analog FAQ - Penn State School of Electrical Engineering and
Analog FAQ - Penn State School of Electrical Engineering and

... a conversion triggered at that time, the ADC may not be able to perform correctly. With one conversion triggered, the logic should return to its correct pre-conversion state—but cases exist where two conversion cycles are necessary before the ADC is certain to perform a valid conversion. Hence, a go ...
Current chopping in SF6
Current chopping in SF6

ST in Aerospace
ST in Aerospace

... DemoBoard Now Flight : 3Q13 ...
Catalogue BIORiphaso MV
Catalogue BIORiphaso MV

... Doing so other protection can’t operate and capacitor can stay in service with a small capacitance reduction. The high reliability of these solutions allows to design capacitors with an higher dielectric stress and so units of reduced volume and higher reactive power per volume unity. ICAR available ...
Introduction to Motor Starting Analysis
Introduction to Motor Starting Analysis

... rotor motor application whether resistances are switched in steps by timing relays or continuously adjusted values obtained through a liquid rheostat feedback starting control. For small loads, voltage stabilizers are sometimes used. These devices provide essentially instantaneous response to voltag ...
A write-time based memristive PUF for hardware security applications
A write-time based memristive PUF for hardware security applications

L-26(TB)(ET) ((EE)NPTEL)
L-26(TB)(ET) ((EE)NPTEL)

Side-Chain Filtering Issue 74
Side-Chain Filtering Issue 74

... Couple this HPF with a LPF (low-pass filter) set in the high-mids to focus the compressor’s detection circuit entirely on the midrange of the vocal. This technique also works well on bass guitar. Remember that these filters are not applied directly to the original signal per se, so the vocal won’t s ...
555/625/750/800/1000/1100 kVA Performance power
555/625/750/800/1000/1100 kVA Performance power

... total harmonic distortion to less than 5 percent. Copper galvanic isolation is provided for both input and output to the UPS while isolating the DC ground from upstream devices in the event of a ground fault condition due to battery leakage. The EPS 8000 is a true high‑performance machine with effic ...
MAX809S - Very Low Supply Current 3-Pin
MAX809S - Very Low Supply Current 3-Pin

... The MAX809 and MAX810 are cost−effective system supervisor circuits designed to monitor VCC in digital systems and provide a reset signal to the host processor when necessary. No external components are required. The reset output is driven active within 10 msec of VCC falling through the reset volta ...
SP3203E 数据资料DataSheet下载
SP3203E 数据资料DataSheet下载

... on Figure 12. There are two methods within IEC61000-4-2, the Air Discharge method and the Contact Discharge method. With the Air Discharge Method, an ESD voltage is applied to the equipment under test (EUT) through air. This simulates an electrically charged person ready to connect a cable onto the ...
31_InstructorSolutionsWin
31_InstructorSolutionsWin

NEW TRIACS: IS THE SNUBBER CIRCUIT NECESSARY?
NEW TRIACS: IS THE SNUBBER CIRCUIT NECESSARY?

... load. At turn off it limits the slope of reapplied voltage dV/dt but generates an overvoltage VM. Its choice results of a compromise in order to respect (dV/dt)c and repetitive peak off state voltage VDRM triac specification.There are two possibilities: 1/ for low VDRM theresonantcircuit must be dam ...
BQ24314 数据资料 dataSheet 下载
BQ24314 数据资料 dataSheet 下载

... other circuit blocks are reset. The IC then waits for duration tDGL(PGOOD) for the input voltage to stabilize. If, after tDGL(PGOOD), the input voltage and battery voltage are safe, FET Q1 is turned ON. The IC has a soft-start feature to control the inrush current. The soft-start minimizes the ringi ...
Torque Wrenches - Motorq
Torque Wrenches - Motorq

... • Unique combination of features, makes this one of the most productive Circuit Testers available in the market place. • Safe to use with EGM’s, sensors, transducers, airbags etc. • No ground wire or clips required. • Detects from 3 to 28 volts. • Light, sound and vibration to indicate voltage. ...
- Notesvillage
- Notesvillage

... directly it 3 φ supply. The impendence of motor at standstill is relatively low and when it is directly connected to the supply system, the current at starting will be high (4 to 10 times the full load current) and at a low power factor. Consequently this method in suitable for relatively small mach ...
NEW TRIACS: IS THE SNUBBER CIRCUIT NECESSARY?
NEW TRIACS: IS THE SNUBBER CIRCUIT NECESSARY?

... load. At turn off it limits the slope of reapplied voltage dV/dt but generates an overvoltage VM. Its choice results of a compromise in order to respect (dV/dt)c and repetitive peak off state voltage VDRM triac specification.There are two possibilities: 1/ for low VDRM theresonantcircuit must be dam ...
A fast LED driver prototype for HCAL calibration
A fast LED driver prototype for HCAL calibration

... • A tunable calibration light in the range 0 to 100MIP • Simplification of the optical system: one LED -> one side emitting fibre, one row of scintillator tiles • PIN photo diode, do we need them? HCAL HH, DEC19, 2007 ...
LMH3401 7-GHz, Ultra-Wideband, Fixed-Gain
LMH3401 7-GHz, Ultra-Wideband, Fixed-Gain

... Wideband Gain Stages Single-Ended to Differential Conversions Level Shifters ...
Types of Wound Film Capacitors
Types of Wound Film Capacitors

... additional categories metal and non-metallic. Metal tubular capacitors generally use a non-ferrous tube, sealed on one or both end with a glass-to-metal seal. This configuration is typically used in low voltage applications (>1000 V), due to lack of adequate space for insulation between the capacito ...
MX7841 Octal, 14-Bit Voltage-Output DAC with Parallel Interface General Description
MX7841 Octal, 14-Bit Voltage-Output DAC with Parallel Interface General Description

... The MX7841 contains eight 14-bit, voltage-output digital-to-analog converters (DACs). On-chip precision output amplifiers provide the voltage outputs. The device operates from ±15V supplies. Its bipolar output voltage swing ranges from (VSS + 2.5V) to (VDD - 2.5V) and is achieved with no external co ...
Determining No-load Condition Without Violating
Determining No-load Condition Without Violating

... The CS5463 has three energy pulse outputs (E1, E2, and E3). The pulse outputs under no-load or starting condition has been well manipulated by the CS5463. In addition, the CS5463 has a no-load threshold register (LOADMin) to help disable the active energy pulse output under some specified condition. ...
AD8114 数据手册DataSheet 下载
AD8114 数据手册DataSheet 下载

< 1 ... 350 351 352 353 354 355 356 357 358 ... 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