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UCC28810 数据资料 dataSheet 下载
UCC28810 数据资料 dataSheet 下载

... error amplifier. The low start-up and operating currents of the device result in low power consumption and ease of start-up. The highly-accurate internal bandgap reference leads to tight regulation of the output voltage in normal and OVP conditions, resulting in higher system reliability. The enable ...
- Kewtech
- Kewtech

... The total leakage current is effectively the sum of the capacitive, conduction and surface leakage currents described above. Each current, and hence the total leakage current is affected by factors such as ambient temperature, conductor temperature, humidity and the applied level of voltage. If a ci ...
When is a Good Ground Not?
When is a Good Ground Not?

... internal resistance) improves cranking performance. A number of single-engine Pipers have 35 ampere-hour batteries in the tail . . they didn't need the extra capacity but the lower internal resistance improved cold weather cranking operations. B&C holds STCs for replacing a 35 ampere-hour, 30 pound ...
TEMPEST – Compromising Emanations
TEMPEST – Compromising Emanations

... 1.6*106 =1/(2*π*R*C). This results in R*C=1/(2*π*1.6*106)=10 -7. This frequency has been chosen because it left a good margin, and capacitors and resistors for this frequency are easy to find. To achieve this product, we could choose a capacitor of 1 nF (1 nano Farad, which ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) e-ISSN: 2278-1676,p-ISSN: 2320-3331,
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) e-ISSN: 2278-1676,p-ISSN: 2320-3331,

Chapter05
Chapter05

Example 19-6
Example 19-6

... If the battery is being charged, you have to “force” the current through the battery, and the V to “force” the current through is greater than the emf, so the + sign is necessary. This will become clear as you work (and understand) problems. Operationally, you simply include an extra resistor to rep ...
5.0 Background Information and Eddy Current Theory
5.0 Background Information and Eddy Current Theory

... Flux flowing through the inducting coil is oscillatory in nature and therefore induces a current in the object undergoing inspections [14]. The induced eddy currents are distributed into the rivet or other inspection media. Because eddy currents are circulatory, they also produce a secondary flux,  ...
History of Power System - University of Washington
History of Power System - University of Washington

AN-566: A Geophone/Hydrophone Acquisition Reference Design
AN-566: A Geophone/Hydrophone Acquisition Reference Design

... the steep digital filter response (see Table II of the data sheet). Similarly, performance of the acquisition system in the presence of signal like linearity and intermodulation or impulse response can be verified by applying an AC or two tone reference source between either TEST+ and TEST- or CAL+ ...
Full Text
Full Text

... frequency doublers, peak amplitude detector, and analog multiplier [1-6]. Squaring circuits are also widely used in other practical applications such as RMS-to-DC converters in instrumentation and non-linear signal generation in analog signal processing. Low power supply consumption has become one o ...
MAX15026 Low-Cost, Small, 4.5V to 28V Wide Operating General Description
MAX15026 Low-Cost, Small, 4.5V to 28V Wide Operating General Description

... The MAX15026 synchronous step-down controller operates from a 4.5V to 28V input voltage range and generates an adjustable output voltage from 85% of the input voltage down to 0.6V while supporting loads up to 25A. As long as the device supply voltage is within 5.0V to 5.5V, the input power bus (VIN) ...
AN-1718 Differential Amplifier Applications Up
AN-1718 Differential Amplifier Applications Up

... ADC and the load capacitor to provide a weak band pass filter effect. For broad band applications, higher value inductors will allow for better low frequency operation. However, large valued inductors will reduce high frequency performance, particularly inductors of small physical sizes such as 0603 ...
Questions - Science @ St John`s
Questions - Science @ St John`s

Section I3: Feedback Amplifiers
Section I3: Feedback Amplifiers

... Section I3: Feedback Amplifiers We are now going to discuss two specific examples of voltage and current feedback using the common-emitter (emitter-resistor) amplifier configuration. The specific examples chosen were previously introduced in Section D8 (Chapter 7 of your text) when we discussed bias ...
MAX9130 Single 500Mbps LVDS Line Receiver in SC70 General Description Features
MAX9130 Single 500Mbps LVDS Line Receiver in SC70 General Description Features

... LVDS is intended for point-to-point communication over a controlled-impedance medium as defined by the ANSI TIA/EIA-644 and IEEE 1596.3 standards. LVDS uses a lower voltage swing than other common communication standards, achieving higher data rates with reduced power consumption while reducing EMI ...
MAX3643 Evaluation Kit Evaluates: General Description Features
MAX3643 Evaluation Kit Evaluates: General Description Features

... The voltage at MDOUT is internally forced to 1.2V during the burst-on period. When the laser driver transitions to a burst-off period, the voltage at MDIN is sampled and then mirrored at MDOUT during the burst-off period. If the monitor diode has a high bandwidth, the MDIN voltage falls significantl ...
Lecture 8
Lecture 8

A Flexible Charge-Balanced Ratiometric Open
A Flexible Charge-Balanced Ratiometric Open

A Novel Low Voltage Low Power OTA Based on Level Shifter
A Novel Low Voltage Low Power OTA Based on Level Shifter

accurate measurement of resistance
accurate measurement of resistance

Tweed Champ 5F1 - cloudfront.net
Tweed Champ 5F1 - cloudfront.net

... V1 input The signal comes from the guitar and enters the amplifier through jacks J1 and J2. These are both standard SwitchCraft 12A jacks or equivalent. From the jacks, the signal carries through R1 (68K) and R2 (68K), developed across R3 (1M) and couples to pin 2 of V1 where it is amplified. V1a ca ...
Slide 1
Slide 1

MAX1638 High-Speed Step-Down Controller with Synchronous Rectification for CPU Power General Description
MAX1638 High-Speed Step-Down Controller with Synchronous Rectification for CPU Power General Description

... the worst-case specification limits for stress-related parameters, such as capacitor ripple current. The MAX1638 circuit was designed for the specified frequency. Do not change the switching frequency ...
Electronic Builing Blocks
Electronic Builing Blocks

< 1 ... 1181 1182 1183 1184 1185 1186 1187 1188 1189 ... 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.
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