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Snubber Capacitors - Application Guide
Snubber Capacitors - Application Guide

... Notice and Disclaimer: All product drawings, descriptions, specifications, statements, information and data (collectively, the “Information”) in this datasheet or other publication are subject to change. The customer is responsible for checking, confirming and verifying the extent to which the Infor ...
10 Electricity Trend setter Questions
10 Electricity Trend setter Questions

... electricity in motion is known as electrodynamics The voltmeter is a high-resistance galvanometer used to measure voltage. It measures the potential difference across any two points in an electric circuit and must always be connected in parallel that is, connected by means of a wire to either side o ...
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EE 101 Lab 2 Ohm`s and Kirchhoff`s Circuit Laws
EE 101 Lab 2 Ohm`s and Kirchhoff`s Circuit Laws

... additional components, such as the resistors that were used in Lab #1. A point in the circuit where two or more components connect together is called a circuit node. A path from one node to another is known as a circuit branch. A closed path through the circuit that starts at a particular node and p ...
THE LINEAR VARIABLE DIFFERENTIAL TRANSFORMER (LVDT
THE LINEAR VARIABLE DIFFERENTIAL TRANSFORMER (LVDT

Chapter 25 Clicker questions.
Chapter 25 Clicker questions.

... b. power at one voltage to the same power at another voltage. c. current from one place to another. d. voltage to useful applications. Explanation: Answers c or d are not the best choices, as is b, the more direct answer. If you answered a, OUCH! … no device creates energy! ...
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Protection of High-Voltage Power Supplies
Protection of High-Voltage Power Supplies

ICL7665 Microprocessor Voltage Monitor with Dual Over/Undervoltage Detection _______________General Description
ICL7665 Microprocessor Voltage Monitor with Dual Over/Undervoltage Detection _______________General Description

... the trip point (1.3V), the current through R11 is 1.3V / R11. The sum of the currents through R21A, R21B and R31 must equal this current when the two input voltages are at the desired low-voltage detection point. Ordinarily, R21A and R21B are chosen so that the current through the two resistors is e ...
Chapter 24: Transformers and Coupled Circuits
Chapter 24: Transformers and Coupled Circuits

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Series Circuit Lab

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MM74HC574WMX - West Florida Components

... advanced silicon-gate P-well CMOS technology. They possess the high noise immunity and low power consumption of standard CMOS integrated circuits, as well as the ability to drive 15 LS-TTL loads. Due to the large output drive capability and the 3-STATE feature, these devices are ideally suited for i ...
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MODEL L SERIES

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... Figure 1: Ideal Transformer Circuit a. Compute the voltage across V2, I1, and I2. b. Compute the power input and power output. c. Compute the reflected impedance seen on the primary side (Hint, you know V1 and I1). ...
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Switchmode Cathodic Protection Rectifiers

... Switchmodes, at their optimum efficiency, perform well in small enclosures within ambient temperatures of up to 158°F (70°C). A heat run was conducted in an enclosure with no ventilation at full load and over a period of 11 hours. The inside enclosure temperature was recorded against the ambient tem ...
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AN1052: Selecting a FET For Use With the Si875x

... Si875x datasheet for actual minimum and maximum values). The threshold voltage of the chosen transistor needs to be significantly below this. For most devices, the threshold voltage is typically less than 5 V and this parameter is usually not an issue. 2.2 Switching Characteristics The switching cha ...
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... The RT9420 provides rotational position feedback via 4...20 mA current loop signal. This device combines the superb linearity and resolution of a plastic-hybrid potentiometer and the durability of Celesco’s 4...20mA circuit to provide an accurate and reliable electrical signal. Additionally the zero ...
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Ari Polisois Simplex
Ari Polisois Simplex

... the power supplies, considering that this subject is recurrent in almost every description of an audio amplifier. As per Fig. #5, you need TWO, different ones. Why will be explained later in the text. The first, intended for the driver sections, must be able to deliver 425V at about 100 mA (actuall ...


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NJW4302 Data Sheet
NJW4302 Data Sheet

< 1 ... 1536 1537 1538 1539 1540 1541 1542 1543 1544 ... 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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