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AD9762 数据手册DataSheet 下载
AD9762 数据手册DataSheet 下载

... The on-chip reference and control amplifier are configured for maximum accuracy and flexibility. The AD9762 can be driven by the on-chip reference or by a variety of external reference voltages. The internal control amplifier which provides a wide (>10:1) adjustment span allows the AD9762 full-scale ...
PawelkiewiczJake1_3_2
PawelkiewiczJake1_3_2

... Along with combinational logic, sequential logic is a fundamental building block of digital electronics. The output values of sequential logic depend not only on the current input values (i.e., combinational logic), but also on previous output values. Thus, sequential logic requires a clock signal t ...
Optical characterization of a leaky-mode polysilicon
Optical characterization of a leaky-mode polysilicon

ERROR PROPAGATION - Moorpark College
ERROR PROPAGATION - Moorpark College

... Look at the picture below and set up your station as shown. Be sure the thermometer is centered in the copper tube and is not touching the sides of the tube. Using the propane torch, heat the pipe uniformly along its length to a temperature of between 1250C and 1500C. When the temperature has somewh ...
49KB - NZQA
49KB - NZQA

... SYSTEM MAINTENANCE Carry out routine inspection and servicing on high voltage minimum oil circuit breakers ...
(Microsoft PowerPoint - 20091103 LUMIDAS
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... 1) LumiDas-T LED lamps consumes dramatically lower energy than conventional metal halide/sodium lamps. Lifetime of LumiDas-T lamp is longer than conventional lamps due to the nature of LEDs. Also the LED tunnel lamp has higher Color Rendering Index (CRI) than metal halide/sodium lamps. (CRI, Metal H ...
TLC2654, TLC2654A  Advanced LinCMOS LOW-NOISE CHOPPER-STABILIZED
TLC2654, TLC2654A Advanced LinCMOS LOW-NOISE CHOPPER-STABILIZED

... high chopping frequency of the TLC2654 and TLC2654A (see Figure 1) provides excellent noise performance in a frequency spectrum from near dc to 10 kHz. In addition, intermodulation or aliasing error is eliminated from frequencies up to 5 kHz. This high dc precision and low noise, coupled with the ex ...
lecture5 - Clarkson University
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... cause the apparent input value to change between a logic 0 and a logic 1. • Highly susceptible to electrostatic discharge (ESD) • Loose devices easily destroyed on a winter’s day in Potsdam ! ...
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Transistor - Downend School

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16826 - Public Address System

IET LABS, INC. 1864-1644 Positive Polarity Megohmmeter
IET LABS, INC. 1864-1644 Positive Polarity Megohmmeter

... We warrant that this product is free from defects in material and workmanship and, when properly used, will perform in accordance with applicable IET specifications. If within one year after original shipment, it is found not to meet this standard, it will be repaired or, at the option of IET, repla ...
Introduction, Features and Applications
Introduction, Features and Applications

... The KL-8078 are high performance microstepping drivers based on one of the most advanced technologies in the world today. They are suitable for driving 2-phase and 4-phase hybrid stepping motors. By using advanced bipolar constant-current chopping technique, they can output more speed and power from ...
Applied Circuit Theory - New Age International
Applied Circuit Theory - New Age International

... linear if y is proportional to x; that is, if y = f(x) then ky = f(kx). Circuit elements are included within this definition of linearity since they may be regarded as circuits. Resistors, capacitors, and inductors are normally close to linear within the range of operation specified by the manufactu ...
International Electrical Engineering Journal (IEEJ) Vol. 6 (2015) No.2, pp. 1787-1791
International Electrical Engineering Journal (IEEJ) Vol. 6 (2015) No.2, pp. 1787-1791

... known to exhibit non-linear behavior such as bifurcation and chaos due to cyclic switching of circuit topology [1]. Chaotic motion occurs frequently in the DC-DC converters, for the performance of the harsh electromagnetic noise, the control system of the intermittent unstable and critical operation ...
Linear and Digital IC Applications - ECM
Linear and Digital IC Applications - ECM

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ICM7555, ICM7556

... The ICM7555/6 devices are, in most instances, direct replacements for the NE/SE 555/6 devices. However, it is possible to effect economies in the external component count using the ICM7555/6. Because the bipolar 555/6 devices produce large crowbar currents in the output driver, it is necessary to de ...
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Compact power supplies up to 150 W TOE 8721 TOE 8722 Overview

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GENERAL DESCRIPTION FEATURES

... device switches between supplies, the DS32kHz measures the temperature and adjusts the crystal load to compensate the frequency. The power supply must remain at a valid level whenever a temperature measurement is made, including when VCC is first applied. While powered, the DS32kHz measures the temp ...
LED Flashlight Instructions
LED Flashlight Instructions

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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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