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Herbert Stemmler
Herbert Stemmler

IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)

4: Capacitors
4: Capacitors

RF3855 数据资料DataSheet下载
RF3855 数据资料DataSheet下载

... Connect to ground plane via 15nH inductor. DC return for the second stage bias circuit. This pin has no internal bonding; therefore, this pin can be connected to output pin 7, connected to the ground plane, or not connected. Slight tuning of the output match may be required due to stray capacitance ...
How to Design a Boost Converter With the TPS61170 Application Report ......................................................................................
How to Design a Boost Converter With the TPS61170 Application Report ......................................................................................

Troubleshooting corvette gauges
Troubleshooting corvette gauges

... discharge. You can perform the following test and see if it makes a diference. Start the engine and let it run for a few minutes until the ammeter reads close to zero. Shut off the engine and with the ignition switch OFF, turn on the high beam lights. Make a note of the ammeter reading. Turn off the ...
nssc spice lab elec1
nssc spice lab elec1

... branch current at the Vin node. Verify that these results are correct by running through the nodal analysis by hand. Assume the following branch currents • i1 is the current running from node 1 to node 4 • i2 is the current from from node 1 to node 3 • i3 is the current from node 3 to node 4 • i4 is ...
Resistors Value Lesson Plan
Resistors Value Lesson Plan

... A resistor is small but important component of your project. The components on your circuit board need to be protected, if we fed a 12 volt current from a battery directly to your small components they would be damaged. A resistor placed in front of a component will only allow a certain current to p ...
Models WH5A, WH5V Isolator (with Square Root
Models WH5A, WH5V Isolator (with Square Root

Document
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preview - SOL*R
preview - SOL*R

... 3) Determine when the variable resistor is set at 0 Ω. To do this, connect the multi-meter (set on the 10 V scale) across the variable resistor as indicated with the positive (+) lead connected to point C and the negative (–) (common) lead to point D. Attach the battery as shown making sure to conne ...
bi-dirctional three-level front- end converter for
bi-dirctional three-level front- end converter for

... IGBT based two-level converters as active front-end converter are very popular due to their bi-directional power flow capability, which is required by many industrial applications like grid integration of renewables, various motor drive applications, micro grid, uninterruptable power supply (UPS) et ...
Design of Accident Prevention System Using QRD 1114
Design of Accident Prevention System Using QRD 1114

... elements that relied on a change in the temperature of the detector. Early thermal detectors were thermocouples and bolometers which are still used today. Thermal detectors are generally sensitive to all infrared wavelengths and operate at room temperature. Under these conditions, they have relative ...
BFR460L3
BFR460L3

... very quickly and conveniently. The model already contains the package parasitics and is ready to use for DC and high frequency simulations. The terminals of the model circuit correspond to the pin configuration of the device. The model parameters have been extracted and verified up to 6 GHz using ty ...
RED72 - Coulton Instrumentation Ltd
RED72 - Coulton Instrumentation Ltd

... are fitted with test terminals. A testmeter on mA range may be touched across these terminals to measure the loop current (4-20 mA). HARTR Configurator The HARTR type transmitter can be connected for point-to-point communication or in multi-drop mode. In both cases it is possible to connect a HARTR ...
LM34/LM35 Precision Monolithic Temperature Sensors
LM34/LM35 Precision Monolithic Temperature Sensors

... the more popular Celsius and Fahrenheit scales. Fortunately, in 1983 two I.C.’s, the LM34 Precision Fahrenheit Temperature Sensor and the LM35 Precision Celsius Temperature Sensor, were introduced. This application note will discuss the LM34, but with the proper scaling factors can easily be adapted ...
Potential Dividers (Revision)
Potential Dividers (Revision)

... What other resistor combinations between A and B will give a potential of 4V between the resistors. 12V ...
QUALITY  ASSESSMENT  OF  METAL  OXIDE ... BY  NOISE SPECTROSCOPY Lech Hasse
QUALITY ASSESSMENT OF METAL OXIDE ... BY NOISE SPECTROSCOPY Lech Hasse

... that exist between the grains. Varistors saturate at higher voltages and their resistance doesn’t exceed tens of ohms. In practice, varistors should exhibit as much as possible nonlinear characteristics. It means high value of a parameter α. There are good, low nonlinear and linear junctions between ...
TBU white paper
TBU white paper

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INTEGRATED RESISTORS

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OPA2822 Dual, Wideband, Low-Noise Operational Amplifier FEATURES

AN394
AN394

... Select Input (S), the Serial Data Input (D), and the Serial Data Output (Q). Some microprocessor chips, such as ST’s microcontroller series, include an on-chip Serial Peripheral Interface (SPI). The MICROWIRE interface is ideally suited to use with these devices. However, the MICROWIRE EEPROM device ...
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An AC High Frequency Quasi Square Wave Bus Voltage for the Next

SN65LBC182 数据资料 dataSheet 下载
SN65LBC182 数据资料 dataSheet 下载

... internally to form a differential input/output (I/O) bus port that is designed to offer minimum loading to the bus. This port operates over a wide range of common-mode voltage, making the device suitable for party-line applications. The device also includes additional features for party-line data bu ...
8.1. Measurement of the electromotive force of an electrochemical cell
8.1. Measurement of the electromotive force of an electrochemical cell

... According to the above considerations, the E MF of a cell can be measured with a voltmeter, provided that the internal resistance of the voltmeter is “high enough”. But what is high enough? Obviously, the current passing the cell must be low enough to ensure the electrochemical equilibrium at both e ...
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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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