• 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
High-Efficiency Backup Power Supply
High-Efficiency Backup Power Supply

... backup capacitor, two items have to be fulfilled. First, the converter must be in forced PWM mode. The converter is able to operate in the reverse direction (only in this mode). To enable the forced PWM mode, the PS/SYNC pin must be programmed to a logic high level. The TPS63060 data sheet shows a d ...
1.5 Series-Parallel Network, Source Transformation
1.5 Series-Parallel Network, Source Transformation

Macro-Tech - AE Techron
Macro-Tech - AE Techron

... Load Impedance: Safe with all types of loads. Rated for 2 to 16 ohms in Stereo, 4 to 16 ohms in Bridge-Mono and 1 to 4 ohms in Parallel-Mono mode. Voltage Gain to 1-kHz, 8-ohm rated output; ...
Industrial Socket Testers 400V Truck and Coach Socket Tester
Industrial Socket Testers 400V Truck and Coach Socket Tester

... Transmitter • Simple operation by single button ...
BDTIC  Application Note No. 014
BDTIC Application Note No. 014

... supply voltage: VCE = VS - 0.65 V The voltage drop of approximately 0.65 V on Rext (i.e. between pins 3 and 4 of BCR400) is almost constant (Rext = 0.65 V x IC). In case a lower VCE is really required (e.g. to prevent exceeding of maximum VCE or VDS ratings), an additional resistor R = (VS - VCE -0. ...
TPS7A30 –35-V, –200-mA, Ultralow
TPS7A30 –35-V, –200-mA, Ultralow

REF1004-1.2 数据资料 dataSheet 下载
REF1004-1.2 数据资料 dataSheet 下载

... ● OPERATES UP TO 20mA ● PACKAGE: 8-Lead SOIC ...
AAT3663 数据资料DataSheet下载
AAT3663 数据资料DataSheet下载

... and GND. Connect directly to GND to disable the timer function. Charge current programming pin. Connect a resistor between this pin and GND to program the constant fast charge current. IC ground connection. Connect this pin to power ground. Battery temperature sense input. Connect the Li-Ion battery ...
Fast Defect Inspection and Classification of Patterned
Fast Defect Inspection and Classification of Patterned

60x36 Poster Template - Picosecond Timing Project
60x36 Poster Template - Picosecond Timing Project

Data Sheet MGA-83563 +22 dBm P 3V Power Amplifier
Data Sheet MGA-83563 +22 dBm P 3V Power Amplifier

... the specific printed circuit board material, thickness, and RF layout that are used. The inductor values shown in Figure 19 have been created for the PCB and RF layout that is used for the circuit examples presented in this application note. The methodology that was used to determine the optimum val ...
FFPF15S60S 15 A, 600 V, STEALTH II Diode TM
FFPF15S60S 15 A, 600 V, STEALTH II Diode TM

... Description ...
MAX1106/MAX1107 Single-Supply, Low-Power, Serial 8-Bit ADCs General Description
MAX1106/MAX1107 Single-Supply, Low-Power, Serial 8-Bit ADCs General Description

... inputs are pin-configurable, allowing unipolar and singleended or differential operation. The full-scale analog input range is determined by the internal reference of +2.048V (MAX1106) or +4.096V (MAX1107), or by an externally applied reference ranging from 1V to VDD. The MAX1106/MAX1107 also featur ...
Lesson: 23
Lesson: 23

RM4TA02 - Schneider Electric
RM4TA02 - Schneider Electric

19 V - 75 W laptop adapter with tracking boost PFC pre
19 V - 75 W laptop adapter with tracking boost PFC pre

MAX1997/MAX1998 Quintuple/Triple-Output TFT LCD Power Supplies with Fault Protection and VCOM Buffer
MAX1997/MAX1998 Quintuple/Triple-Output TFT LCD Power Supplies with Fault Protection and VCOM Buffer

... postregulate charge-pump outputs for TFT gate-on and gate-off supplies. Both linear-regulator controllers, as well as the step-up regulator, have supply-sequencing control inputs. The three outputs can be sequenced in any order by selecting the appropriate external components. The MAX1997 features a ...
The Tech2 L200 Variable Voltage Regulator
The Tech2 L200 Variable Voltage Regulator

... output is therefore constant to within only a few percent of the set level. 1.2. The limits of regulator design Voltage regulators work by resisting current flow – holding back energy to create a drop in the voltage. The internal characteristics of the regulator means that there has to be a certain ...
File
File

... conduction. Turn-off must be achieved in the anode-to-cathode circuit. There are three ways in which turn-off, or commutation as it is commonly called, can be achieved by: (1) reversing the anode-to-cathode voltage; (2) reducing the anode current below the holding current level; (3) forcing current ...
Question Bank - International Virtual University Campus
Question Bank - International Virtual University Campus

AN5326, Using the Programmable Gain Amplifier in the S12ZVLA
AN5326, Using the Programmable Gain Amplifier in the S12ZVLA

... Information in this document is provided solely to enable system and software implementers to use NXP products. There are no express or implied copyright licenses granted hereunder to design or fabricate any integrated circuits based on the information in this document. NXP reserves the right to mak ...
MT-090 TUTORIAL Sample-and-Hold Amplifiers
MT-090 TUTORIAL Sample-and-Hold Amplifiers

... The sample-and-hold amplifier, or SHA, is a critical part of most data acquisition systems. It captures an analog signal and holds it during some operation (most commonly analog-digital conversion). The circuitry involved is demanding, and unexpected properties of commonplace components such as capa ...
Second Order Circuits I
Second Order Circuits I

BD6383EFV
BD6383EFV

... dissipation. The back metal is shorted with the back side of the IC chip, being a GND potential, therefore there is a possibility for malfunction if it is shorted with any potential other than GND, which should be avoided. Also, it is recommended that the back metal is soldered onto the GND to short ...
Annex C: Bid Submission Forms
Annex C: Bid Submission Forms

... 7 The Bidder shall fill in this Form in accordance with the instructions. Apart from providing additional information, no alterations to its format shall be permitted and no substitutions shall be accepted. ...
< 1 ... 512 513 514 515 516 517 518 519 520 ... 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