• 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
Physics 536 Spring 2008 Project - Due April 25
Physics 536 Spring 2008 Project - Due April 25

P82774
P82774

... When calculating the maximum inrush or peak current: use Figure 1 to determine the highest value of "Rated Inrush Current" for a strobe (across the expected operating voltage range of the strobe); then multiply that value by the total number of strobes on the circuit; be sure to add the inrush or pe ...
Lecture 5-2 Capacitor Intro
Lecture 5-2 Capacitor Intro

Too Much Power Task - TaranakiSecondaryLiteracyNLC
Too Much Power Task - TaranakiSecondaryLiteracyNLC

TLV906x 10-MHz, RRIO, CMOS Operational
TLV906x 10-MHz, RRIO, CMOS Operational

... 8.3.1 Rail-to-Rail Input The input common-mode voltage range of the TLV906x family extends 100 mV beyond the supply rails for the full supply voltage range of 1.8 V to 2.5 V. This performance is achieved with a complementary input stage: an N-channel input differential pair in parallel with a P-chan ...
Phasors
Phasors

... Given this we can apply the techniques of analysis of resistive circuits with phasors to analyse single frequency AC circuits containing resistors, capacitors, and inductors. Multiple frequency AC circuits and AC circuits with different waveforms can be analysed to find voltages and currents by tran ...
Module3 Parallel Circuits
Module3 Parallel Circuits

HMC368LP4 / 368LP4E
HMC368LP4 / 368LP4E

... 100 kHz SSB Phase Noise: -140 dBc/Hz +5V @ 75 mA Supply 16 mm2 Leadless QFN SMT Package ...
DC1521 - LT3956EUHE Evaluation Kit Quick
DC1521 - LT3956EUHE Evaluation Kit Quick

Lab 14: ADC, FFT, and Noise
Lab 14: ADC, FFT, and Noise

... decrease the speed of the sweep. Again you should see the fluctuation decrease, though this time the level stays the same. (4) Observe the output of the white noise source using the 1/3-octave band analyzer. Explain why you expect to see a 3 dB per octave rise on this analyzer. (5) Pink noise is mad ...
REF3012 数据资料 dataSheet 下载
REF3012 数据资料 dataSheet 下载

... The REF30xx is a series, CMOS, precision bandgap voltage reference. Its basic topology is shown in Figure 1. The transistors Q1 and Q2 are biased such that the current density of Q1 is greater than that of Q2. The difference of the two base-emitter voltages, Vbe1 – Vbe2, has a positive temperature c ...
NEGATIVE RESISTANCE CHARACTERISTICS AND USES OF
NEGATIVE RESISTANCE CHARACTERISTICS AND USES OF

... Method for Obtaining Characteristic Gurjgfs The dynamic pictures on the oscilloscope were obtained by applying the negative haIf-cycle of a 60-cycle voltage to the crystal. A resistance of about 500 ohms was placed in series with the crystal to obtain a voltage proportional to the current for vertic ...
SQUID - Superconducting Quantum Interference Devices
SQUID - Superconducting Quantum Interference Devices

... Frequency can be measured with extreme accuracy. The standard volt is now defined as the voltage required to produce a frequency of 483,597.9 GHz. Voltages with accuracies of 10-10V. NIST has produced a chip with 19000 series junctions to measure voltages on the order of 10 volts with this accuracy. ...
power controller user`s manual
power controller user`s manual

Pyroelectric Infrared Sensor
Pyroelectric Infrared Sensor

LM2524D/LM3524D Regulating Pulse Width Modulator
LM2524D/LM3524D Regulating Pulse Width Modulator

... Note 1: Unless otherwise stated, these specifications apply for TA e TJ e 25§ C. Boldface numbers apply over the rated temperature range: LM2524D is b 40§ to 85§ C and LM3524D is 0§ C to 70§ C. VIN e 20V and fOSC e 20 kHz. Note 2: For operation at elevated temperatures, devices in the N package must ...
AM-560 AM-570 AM-540-EUR AM-550-EUR
AM-560 AM-570 AM-540-EUR AM-550-EUR

... The Amprobe AM-570 / AM-550-EUR is a fully featured multimeter designed for professional electricians who need to maintain service or troubleshoot advanced electrical systems. True-rms sensing accurately measures voltage on systems affected by harmonics; built-in flashlight allows you to identify wi ...
Wheatstone bridge circuit
Wheatstone bridge circuit

... CHAPTER 5 ...
Basic Electrical Engineering Laboratory
Basic Electrical Engineering Laboratory

... 6. Planck’s constant determination set-up with LED’s of different wavelengths. 7. Planck’s constant determination set-up using solar cell, on an optical bench AR coated filters in filter wheel. 8. Hall Effect experimental set-up: Complete in all respect with electromagnet, digital power supply, and ...
Assemble Manual - DIY, audio, electronics
Assemble Manual - DIY, audio, electronics

... maximum in real life, to allow for fluctuations. 4. Solder the rest of the resistors in place. See table 1 for selecting the input resistor values. 5. Solder C14, C15, C100 and C20 in place. As with all electrolytic capacitor the polarity must be respected. The positive pad is usually rectangular an ...
Transformer - Electrical engineering
Transformer - Electrical engineering

... •A typical op amp is an integrated device which has 1. Noninverting input 2. Inverting input 3. Two DC power supply leads (positive and negative) 4. An output terminal 5. Some other leads for fine tuning ...
48-Pulse Based SSSC (Static Synchronous Series
48-Pulse Based SSSC (Static Synchronous Series

Thermoelectric Cooling Performance
Thermoelectric Cooling Performance

... 3) Why are there differences between the manufacturer’s data and the experimental results for the plots of COP vs  T? Speculate about multiple causes. How could the thermocouples be positioned differently to get more accurate results? 4) Some of the  T values at low TEC voltages were initially neg ...
MAX1708 High-Frequency, High-Power, Low-Noise, Step-Up DC-DC Converter General Description
MAX1708 High-Frequency, High-Power, Low-Noise, Step-Up DC-DC Converter General Description

... (350kHz < fCLK < 1MHz) is applied to CLK. For wireless or noise-sensitive applications, this ensures that switching harmonics are predictable and kept outside the IF frequency band(s). High-frequency operation permits low-magnitude output ripple voltage and minimum inductor and filter capacitor size ...
permanent-magnet moving-coil movement
permanent-magnet moving-coil movement

... give full scale deflection. In addition, the sensitivity may be expressed as the number of millivolts across the meter when full scale current flows through it. This voltage drop is obtained by multiplying the full scale current by the resistance of the meter movement. A meter movement, whose resist ...
< 1 ... 1098 1099 1100 1101 1102 1103 1104 1105 1106 ... 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