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Bryant & Stratton Course Course Number ELET200
Bryant & Stratton Course Course Number ELET200

... Optional sections are included in many experiments. They are to be used at the discretion of the instructor. Applications sections demonstrate how to use transducers such as buzzers, LEDs, microphones, motors, photoresistors, phototransistors, and speakers. Additional Work sections include advanced ...
Major causes of transient overvoltages
Major causes of transient overvoltages

... Bond grounds together at the equipment. Reduce, or prevent, surge current from flowing between grounds. • Create a low-pass filter using limiting and blocking principles. ...
LP2952/LP2952A/LP2953/LP2953A Adjustable Micropower Low-Dropout Voltage Regulators General Description Features
LP2952/LP2952A/LP2953/LP2953A Adjustable Micropower Low-Dropout Voltage Regulators General Description Features

... Note 3: When used in dual-supply systems where the regulator load is returned to a negative supply, the output voltage must be diode-clamped to ground. Note 4: May exceed the input supply voltage. Note 5: Output or reference voltage temperature coefficient is defined as the worst case voltage change ...
VCO-111S 数据资料DataSheet下载
VCO-111S 数据资料DataSheet下载

... Rating conditions to the device may reduce device reliability. Specified typical performance or functional operation of the device under Absolute Maximum Rating conditions is not implied. RoHS status based on EUDirective2002/95/EC (at time of this document revision). The information in this publicat ...
FIN1019 3.3V LVDS High Speed Differential Driver/Receiver
FIN1019 3.3V LVDS High Speed Differential Driver/Receiver

MAX16962 4A, 2.2MHz, Synchronous Step-Down DC-DC Converter General Description
MAX16962 4A, 2.2MHz, Synchronous Step-Down DC-DC Converter General Description

... The MAX16962 is a high-efficiency, synchronous stepdown converter that operates with a 2.7V to 5.5V input voltage range and provides a 0.8V to 3.6V output voltage range. The wide input/output voltage range and the ability to provide up to 4A to load current make this device ideal for on-board point- ...
LT2078/LT2079- Micropower, Dual and Quad, Single Supply, Precision Op Amps
LT2078/LT2079- Micropower, Dual and Quad, Single Supply, Precision Op Amps

... the LT2078/LT2079 was concentrated on reducing supply current without sacrificing other parameters. The offset voltage achieved is the lowest on any dual or quad nonchopper stabilized op amp––micropower or otherwise. Offset current, voltage and current noise, slew rate and gain bandwidth product are ...
Solution - inst.eecs.berkeley.edu
Solution - inst.eecs.berkeley.edu

Delphi Series E48SC12005, Eighth Brick Family DC/DC Power
Delphi Series E48SC12005, Eighth Brick Family DC/DC Power

... Delphi Series E48SC12005, Eighth Brick Family DC/DC Power Modules: 48V in, 12V/5A out The Delphi Series E48SC12005, Eighth Brick, 48V input, single output, isolated DC/DC converter is the latest offering from a world leader in ...
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Type TK Low TC Precision Radial-Lead Film Resistors

Principles of Conversion - Operating Tech Electronics, Inc.
Principles of Conversion - Operating Tech Electronics, Inc.

... Most electronic equipment runs from the AC mains supply, therefore the most common type of power conversion is from AC to DC and will be referred to as a "mains power supply" or "off-line power supply". The simplest form of AC-DC power supply consists of a 50 Hz transformer (which changes, or "tran ...
GYROSTAR® Ultra-Small angular velocity sensor with Murata`s
GYROSTAR® Ultra-Small angular velocity sensor with Murata`s

UCN5804 - Allegro Microsystems
UCN5804 - Allegro Microsystems

... many L/R applications, this substrate current is high enough to adversely affect the logic circuitry and cause misstepping. External series diodes (Schottky are recommended for increased efficiency at low-voltage operation) will prevent substrate current from being sourced through the outputs. Alter ...
DP-57 - Accuphase
DP-57 - Accuphase

... used in the DP-57 features an enhanced current-to-voltage (I/V) conver ter for processing the D/A conver ter output current. In combination with voltage summing, this design results in even better stability and top-notch perfor mance. The music emerges from a totally silent background, with breathta ...
R Ω Ω = + = Ω Ω+ Ω - Lakota East High School
R Ω Ω = + = Ω Ω+ Ω - Lakota East High School

... 13. When a light bulb is connected to a 4.5 V battery, a current of 0.16 A passes through the bulb filament. What is the resistance of the filament? ...
A 100 Watt Audio Amplifier Employing The LM3876
A 100 Watt Audio Amplifier Employing The LM3876

... very low distortion was available from 20 Hz to 20,000 Hz (2nd and 3rd harmonic distortion products were less than 50 dB below the fundamental energy at any frequency in this range). The upper –3 dB point of the amplifier was at 50 kHz, measured at 50 watts output. The output noise level was very lo ...
Input-output Transfer Function Analysis of a Photometer Circuit Based on an Operational Amplifier
Input-output Transfer Function Analysis of a Photometer Circuit Based on an Operational Amplifier

... According to [20], the circuit shown in Fig. 2 has both advantages and disadvantages. On the one hand, if the photodiode exhibits very good characteristics and the ambient temperature is held constant at the optimum value, this circuit provides a very high quality output voltage. On the other hand, ...
555 data sheet
555 data sheet

... General-purpose single bipolar timers Features ...
Using Thyristors in Heating Applications
Using Thyristors in Heating Applications

... Significant neutral currents can flow in 4-wire 3-phase thyristor controlled circuits, even when the load is nominally balanced. For example, if a burst fire thyristor or solid state relay is fitted in each line but the firing is not synchronised, then the return current flows through the neutral. I ...
Evaluates:  MAX1737 MAX1737 Evaluation Kit General Description Features
Evaluates: MAX1737 MAX1737 Evaluation Kit General Description Features

... Jumper JU1 connects the MAX1737 thermistor input (THERM) to GND through a 10kΩ resistor, disabling temperature qualification. To enable temperature qualification (charging between 0°C and 50°C), remove the shunt from JU1, and connect a thermistor (BC Components part number 2322-640-63103 or equivale ...
EET 163 B232
EET 163 B232

pdf document
pdf document

Analysis of Leakage Current and DC Injection in Transformerless PV
Analysis of Leakage Current and DC Injection in Transformerless PV

FEATURES DESCRIPTION D
FEATURES DESCRIPTION D

... required. However, if the OPA561 is intended to be driven into current limit, an R/C network (snubber) may be required. A snubber circuit may also enhance stability when driving large capacitive loads (> 1000pF) or inductive loads (motors, loads separated from the amplifier by long cables). Typicall ...
Optical Detectors
Optical Detectors

... speed or linearity of response, one must know two important electrical characteristics of a photodiode: the junction capacitance and the shunt resistance. Without these, the RC time constant of the complete operating circuit cannot be calculated. The parallel plate capacitance across the depletion r ...
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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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