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3-Phase Voltage Source Inverter With Square Wave Output
3-Phase Voltage Source Inverter With Square Wave Output

Automatic engine RPM control circuit description 3
Automatic engine RPM control circuit description 3

PDF
PDF

ISL28233IUZ
ISL28233IUZ

... All input terminals have internal ESD protection diodes to both positive and negative supply rails, limiting the input voltage to within one diode beyond the supply rails. For applications where either input is expected to ...
Slide Title Goes Here
Slide Title Goes Here

... link intrinsically eye-safe at the front panel connector of the Readout Module • Unkown – whether the light level at the receiver is adequate for good link performance • Known – the TTC optical links are intrinsically eye-safe and perform very well ...
Current-Only Directional Overcurrent Relay
Current-Only Directional Overcurrent Relay

ph104exp03_DC_Circuits_03 - Physics Department, Princeton
ph104exp03_DC_Circuits_03 - Physics Department, Princeton

... metal-lined, so inserting a lead into a hole means connecting that lead to the hole. Within set patterns, the holes are themselves connected together (the connections between the holes are made with metal on the inside of the breadboard, so you can't see them by eye). The figure shows you four examp ...
ADL5310 数据手册DataSheet 下载
ADL5310 数据手册DataSheet 下载

... use the accurate logarithmic relationship between a bipolar transistor’s base emitter voltage and collector current, with appropriate scaling by precision currents to compensate for the inherent temperature dependence. Input and reference current pins sink current ranging from 3 nA to 3 mA (limited ...
FETs, the curve trace,r and PSpice simulation -
FETs, the curve trace,r and PSpice simulation -

... and sweep-voltage series resistance should be set so your curve family fills about ¾ of the screen. Sketch (or photograph and print) the characteristics. Be sure to label your axes values and the values of the VGS steps since the 577 tracer does not do this for you. With the device still in the test ...
Pspice Slide - Electrical Engineering
Pspice Slide - Electrical Engineering

... from N+ through the switch to node N-. VN is the voltage source through which the controlling current flows. WNAME is the model name of the switch. ION: control current for ON state, unit: A, default: 1E-3. IOFF: control current for OFF state, unit: A, default: 0. RON: ON state resistance, unit: Ohm ...
Switched - Vicphysics
Switched - Vicphysics

... transistor itself is small compared to the other resistors (X & Y) in the circuit, and makes very little difference in that regard. But, if you make the resistance of X very large, so that the current through that path in the circuit almost stops, then no current will flow through Y either. A small ...
Lab 9-1a: Op-Amp limitation – slew rate (p200)
Lab 9-1a: Op-Amp limitation – slew rate (p200)

... Lab 12-2: Three terminal fixed regulator (p275) Read pages 267-73 on voltage regulators. Hook up the circuit in Fig. L12.4 with two modifications: first, do not use the fixed 15V supply (just use the variable supply which can go up to 21V) and, second, add your multimeter (configured for measuring ...
ADL5391 DC to 2.0 GHz Multiplier Data Sheet (Rev. 0)
ADL5391 DC to 2.0 GHz Multiplier Data Sheet (Rev. 0)

... can be done using a balun or active components, such as the AD8313, the AD8132 (both with operation down to dc), or the AD8352 (for higher drive capability). If using the ADL5391 single-ended without ac coupling capacitors, the reference voltage of 2.5 V needs to be taken into account. Voltages abov ...
Transformers
Transformers

MAX6613MXK+T
MAX6613MXK+T

datasheet - KANSAI
datasheet - KANSAI

Power Factor Improvement of a Three Phase Rectifier by Boost
Power Factor Improvement of a Three Phase Rectifier by Boost

3P - Middle Atlantic
3P - Middle Atlantic

... Specifier Notes: Specify required options. Delete options not required. Consult Middle Atlantic Products for more information. ...
DC Motor Drives - Universiti Teknologi Malaysia
DC Motor Drives - Universiti Teknologi Malaysia

... 0 to base  armature voltage, above base  field flux reduction Armature voltage control Field flux control ...
V/F control - ResearchGate
V/F control - ResearchGate

... Induction motors with squirrel cage rotors are the workhorse of industry because of their low cost and rugged construction. When Squirrel cage induction machine is operated directly from the line voltages(60 Hz/50 Hz essentially constant voltage) an Induction motor is operated at constant speed. How ...
Semi-Conductor Diode notes
Semi-Conductor Diode notes

... and corresponding increase in current. Forward bias can be increased to the point where every available electron/hole combination is being utilized. This condition is called “Saturation”. Any further increase in forward bias will cause non-free electrons to start moving, and will destroy the diode. ...
Experiments for First Year Electrical Engg Lab
Experiments for First Year Electrical Engg Lab

... ii) After the saturation point, now current is again reduced to zero. Due to this field strength also reduces to zero. But it is observed that flux density do not trace the same curve back but falls back as compared to previous magnetization curve .This phenomenon of falling back of flux density whi ...
ADP3088 1 MHz, 750 mA Buck Regulator Data Sheet (REV. C)
ADP3088 1 MHz, 750 mA Buck Regulator Data Sheet (REV. C)

... PWM comparator, whichever is lower. The error amplifier measures the output voltage through an external resistor divider tied to the FB pin. This amplifier servos the switch current to regulate the FB pin voltage to 1.245 V. An internal regulator provides power to the control circuitry. The COMP pin ...
TLV7256 - Texas Instruments
TLV7256 - Texas Instruments

Learn the Importance of Isolation In Four Easy Lessons
Learn the Importance of Isolation In Four Easy Lessons

< 1 ... 1191 1192 1193 1194 1195 1196 1197 1198 1199 ... 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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