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Glossary of Terms - Instrument Repair and Calibration
Glossary of Terms - Instrument Repair and Calibration

Op Amp integrated 8th order Butterworth low pass filter
Op Amp integrated 8th order Butterworth low pass filter

... Offset Adjust Input. To adjust output offset, bias OS externally. Connect OS to COM if no offset adjustment is needed. Refer to Offset and Common-Mode Input Adjustment section. Shutdown Input. Drive low to enable shutdown mode; drive high or connect to VDD for normal operation. Clock Input. To overr ...
GainMaker High Output HGBT 1 GHz with 42/54 MHz SPlit
GainMaker High Output HGBT 1 GHz with 42/54 MHz SPlit

... The GainMaker® Broadband Amplifier Platform includes a variety of RF amplifiers that address the divergent needs of today’s broadband networks. All GainMaker amplifiers provide superior 2-way performance and reliability combined with a user-friendly layout. All share common plug-in accessories and p ...
Smart sensor II dual-channel 1-bit, 4 MHz, second-order sigma
Smart sensor II dual-channel 1-bit, 4 MHz, second-order sigma

... The STPMS2 is a device designed to measure electrical line parameters (voltage and current) via analog signals from voltage sensors (current divider) and current sensors (inductive Rogowski coil, current transformer or shunt resistors). The device is used together with a digital signal processing ci ...
General
General

... The data loggers DL16 and DL16CAN have the ability to acquire signals from their voltage inputs, digital inputs (i.e. frequency signals), serial input (i.e. GPS-receiver) and logical signal input, and to save these signals onto an integrated 8-MB-SRAM-card with a sample frequency of up to 4 kHz (wit ...
Ballast Basics I - Universal Lighting Technologies
Ballast Basics I - Universal Lighting Technologies

... transistors, diodes, capacitors, IC’s, resistors, etc.) The High frequency voltage is then increased to a higher voltage so that it can ignite the lamps while also being able to limit the lamp current ...
In this lesson we will Study the control of several different kinds of
In this lesson we will Study the control of several different kinds of

... As with so many other parts of the design Constraints must be identified and included in design specification Not during the prototype development Motors are mechanical devices Typically have much looser time constraints Than one frequently finds in control of their electronic counterparts It’s rea ...
Parameter Display Program
Parameter Display Program

... 'Word value of the pulse length 'Used to calculate B ...
PSU_Part4_IsolatedDCDC - Renesas E
PSU_Part4_IsolatedDCDC - Renesas E

... ◊ The generic term "PWM IC" is unsuitable to use for "resonance converter ICs", which do not have duty control. ◊ "AC/DC" refers to the "function" of an AC adaptor or power supply unit. As the ICs are used for circuits that convert from DC to DC, the expression "AC/DC ICs" is not appropriate. ◊ With ...
Supplemental Correction Sheet for Solar Photovoltaic
Supplemental Correction Sheet for Solar Photovoltaic

Lecture 17
Lecture 17

... current through, the amount of current which flows stops increasing→ an effect called pinch-off. • Think of water being sucked through a flexible wall tube. Dropping the pressure at the end in order to try to get more water to come through just collapses the tube. • The current flow then just depend ...
PowerPoint 演示文稿
PowerPoint 演示文稿

... The information in this document may contain predictive statements including, without limitation, statements regarding the future financial and operating results, future product portfolio, new technology, etc. There are a number of factors that could cause actual results and developments to differ m ...
MAX16050/MAX16051 Voltage Monitors/Sequencer Circuits with
MAX16050/MAX16051 Voltage Monitors/Sequencer Circuits with

... can reverse sequence the outputs. In this situation, each voltage is turned off sequentially until it reaches a 250mV level, at which point, the next supply is turned off. The MAX16050/MAX16051 also provide internal pulldown circuitry that turns on during power-down, to help discharge large output c ...
Electronic Instruments
Electronic Instruments

B  2.5 A Output Current, IGBT Drive Optocoupler with Desaturation Detection
B 2.5 A Output Current, IGBT Drive Optocoupler with Desaturation Detection

... The internal gate driving circuitry of FOD8316 can be used with either a single positive power supply, VDD2, or a dual positive and negative supply, VDD2 and VSS. The output driver stage, VO, is made up of a pair of PMOS and NMOS transistors, which facilitates close to rail-to-rail output swing. Thi ...
Fundamentals of On-Resistance in Load Switches
Fundamentals of On-Resistance in Load Switches

“Monitorizarea calităţii energiei electrice dintr
“Monitorizarea calităţii energiei electrice dintr

... graphical method. I thought the graphic method is most suitable for this application [5]. According to this method, it is necessary to be constructed of natural or artificial mechanical properties formed by the coupling to the rotor circuit of the power levels of the resistance. It should be given l ...
OKI-78SR Series
OKI-78SR Series

... The user must assure that the input source has low AC impedance to provide dynamic stability and that the input supply has little or no inductive content, including long distributed wiring to a remote power supply. The converter will operate with no additional external capacitance if these condition ...
High Current Pulse Generator
High Current Pulse Generator

... our project. The device works on the basis of storing a large charge and then being able to control the discharge through a load. The first part of the device is the power delivery and power storage. Our supply of power is a normal 120V AC wall outlet. To supply our circuit with power we need a DC v ...
Canadian Electrical Code, Part I Full Impact Assessment
Canadian Electrical Code, Part I Full Impact Assessment

... connected load, if known; otherwise it shall be 80% of the rating of the overload or overcurrent devices protecting the branch circuit, whichever is smaller. (1) The voltage drop in an installation shall be based on the connected load of the feeder or branch circuit if known; otherwise it shall be b ...
I s
I s

5. Load - St. Aloysius Institute of Technology, Jabalpur
5. Load - St. Aloysius Institute of Technology, Jabalpur

Electric Safety - University of Washington
Electric Safety - University of Washington

... • During a weather storm, an atmospheric discharge hits a lightning pole. The pole is grounded through a hemisphere, and the maximum lightning current through the pole is 20,000A. – A person is playing golf 30 meters away from the center of the hemisphere. The distance between his feet is 0.3m, and ...
AD8304 160 dB Range (100 pA –10 mA) Logarithmic Converter
AD8304 160 dB Range (100 pA –10 mA) Logarithmic Converter

2 marks EC2201
2 marks EC2201

< 1 ... 899 900 901 902 903 904 905 906 907 ... 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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