Power Electronics
... is the only wide band gap semiconductor among gallium nitride (GaN, EG = 3.4 eV), aluminum nitride (AlN, EG = 6.2 eV), and silicon carbide that possesses a high-quality native oxide suitable for use as an MOS insulator in electronic devices The breakdown field in SiC is about 8 times higher than in ...
... is the only wide band gap semiconductor among gallium nitride (GaN, EG = 3.4 eV), aluminum nitride (AlN, EG = 6.2 eV), and silicon carbide that possesses a high-quality native oxide suitable for use as an MOS insulator in electronic devices The breakdown field in SiC is about 8 times higher than in ...
Power Supplies - UniMAP Portal
... input. This is achieved by VL forward-biasing reverse-biased diode during the off times producing current and charging the capacitor for voltage production during the off times. With switching regulators 90% efficiencies can be achieved. ...
... input. This is achieved by VL forward-biasing reverse-biased diode during the off times producing current and charging the capacitor for voltage production during the off times. With switching regulators 90% efficiencies can be achieved. ...
PT420 Cable Actuated Sensor Instrument Grade • 4..20mA / 0..20mA
... Powder Painted & Anodized Aluminum Enclosure Industrial Automation & Testing Applications ...
... Powder Painted & Anodized Aluminum Enclosure Industrial Automation & Testing Applications ...
RLC Circuits Note
... of the inductor plus any resistance contributed by the Function Generator. Normally the Function Generator has an output impedance of 50 W. Verify that this is the case. Use an ohmmeter to measure the resistance of the inductor, add the value contributed by the Function Generator and use this sum in ...
... of the inductor plus any resistance contributed by the Function Generator. Normally the Function Generator has an output impedance of 50 W. Verify that this is the case. Use an ohmmeter to measure the resistance of the inductor, add the value contributed by the Function Generator and use this sum in ...
Lecture 21 - UConn Physics
... • The inductance of an inductor ( a set of coils in some geometry ..eg solenoid, toroid) then, like a capacitor, can be calculated from its geometry alone if the device is constructed from conductors and air. • If extra material (eg iron core) is added, then we need to add some knowledge of material ...
... • The inductance of an inductor ( a set of coils in some geometry ..eg solenoid, toroid) then, like a capacitor, can be calculated from its geometry alone if the device is constructed from conductors and air. • If extra material (eg iron core) is added, then we need to add some knowledge of material ...
In the experiment, the NTC resistance (and the associated
... The heater (high-power resistor driven by Darlington circuit) As heating device we use a simple high-power resistor that is driven by a so-called Darlington circuit, comprising a back-to-back combination of a standard transistor and a high-power transistor (see figure). Such a combination is needed ...
... The heater (high-power resistor driven by Darlington circuit) As heating device we use a simple high-power resistor that is driven by a so-called Darlington circuit, comprising a back-to-back combination of a standard transistor and a high-power transistor (see figure). Such a combination is needed ...
Short-Circuit Isolation
... be fully established when designing a fire detection system. Apollo offers a software program with which the viability of a design can be checked. The program, LoopCalc, may be downloaded from Apollo’s website: www.apollo-fire.co.uk If the fire control panel has built-in isolators, it is essential t ...
... be fully established when designing a fire detection system. Apollo offers a software program with which the viability of a design can be checked. The program, LoopCalc, may be downloaded from Apollo’s website: www.apollo-fire.co.uk If the fire control panel has built-in isolators, it is essential t ...
OICA Draft Proposal for the ELSA
... In cases where the measured values are not stable due to the operation of the on-board isolation resistance monitoring system, etc., necessary modification for conducting the measurement may be carried out, such as stopping of the operation of the device concerned or removing it. Furthermore, when t ...
... In cases where the measured values are not stable due to the operation of the on-board isolation resistance monitoring system, etc., necessary modification for conducting the measurement may be carried out, such as stopping of the operation of the device concerned or removing it. Furthermore, when t ...
Improved PL Tone Encoder
... Among the changes in this circuit are the use of a 78L05 IC voltage regulator instead of a resistor and a zener diode. This device looks like a transistor but has an extremely stable output voltage. The most important change is the use of an Op Amp as the output buffer. I originally tried using a Fi ...
... Among the changes in this circuit are the use of a 78L05 IC voltage regulator instead of a resistor and a zener diode. This device looks like a transistor but has an extremely stable output voltage. The most important change is the use of an Op Amp as the output buffer. I originally tried using a Fi ...
Electricity
... excess charge from one place to another. • Electric Current – is the flow of electric charge, measured in amperes. • Circuit – is closed conducting loop in which electric current can flow continually. • Voltage – is a measure of the amount of electrical potential energy in a flowing electric circuit ...
... excess charge from one place to another. • Electric Current – is the flow of electric charge, measured in amperes. • Circuit – is closed conducting loop in which electric current can flow continually. • Voltage – is a measure of the amount of electrical potential energy in a flowing electric circuit ...
MAX8569A/MAX8569B 200mA Step-Up Converters in 6-Pin SOT23 and TDFN General Description
... The MAX8569A and MAX8569B compact high-efficiency step-up converters feature low-quiescent supply current to ensure the highest possible efficiency over a wide load range. With a minimum 1.5V input voltage, these devices are well suited for applications with two alkaline cells, two nickel-metal-hydr ...
... The MAX8569A and MAX8569B compact high-efficiency step-up converters feature low-quiescent supply current to ensure the highest possible efficiency over a wide load range. With a minimum 1.5V input voltage, these devices are well suited for applications with two alkaline cells, two nickel-metal-hydr ...
LM358 - Engineering Electronics Shop
... supply should be of short time duration. Units can be destroyed, not as a result of the short circuit current causing metal fusing, but rather due to the large increase in IC chip dissipation which will cause eventual failure due to excessive function temperatures. Putting direct short-circuits on m ...
... supply should be of short time duration. Units can be destroyed, not as a result of the short circuit current causing metal fusing, but rather due to the large increase in IC chip dissipation which will cause eventual failure due to excessive function temperatures. Putting direct short-circuits on m ...
Source Resistance Induced Distortion in Op Amps
... shown in Figure 1. The readings at 1kHz and 10kHz were recorded for various values of source resistance from 100Ω to 100k. The measured results for several op amps are plotted in Figures 2 and 3. ...
... shown in Figure 1. The readings at 1kHz and 10kHz were recorded for various values of source resistance from 100Ω to 100k. The measured results for several op amps are plotted in Figures 2 and 3. ...
IR_SHARP
... Over the years, Sharp has introduced a family of infra-red detectors. These detectors boast a small package, very little current consumption, and a variety of output options. This article offers an overview of the various types, information on interfacing them, and hints and tips. A Little History I ...
... Over the years, Sharp has introduced a family of infra-red detectors. These detectors boast a small package, very little current consumption, and a variety of output options. This article offers an overview of the various types, information on interfacing them, and hints and tips. A Little History I ...
model sr540 optical chopper
... The Model SR540 Optical Chopper is used to square-wave modulate the intensity of optical signals. The unit can chop light sources at rates from 4 Hz to 3.7 kHz. Versatile, low jitter reference outputs provide the synchronizing signals required for several operating modes: single or dual beam; sum & ...
... The Model SR540 Optical Chopper is used to square-wave modulate the intensity of optical signals. The unit can chop light sources at rates from 4 Hz to 3.7 kHz. Versatile, low jitter reference outputs provide the synchronizing signals required for several operating modes: single or dual beam; sum & ...
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.