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ILB-CP05 - IOTA Engineering
ILB-CP05 - IOTA Engineering

EE-0903368-Electronics Laboratory Experiment 3-Feb-2017
EE-0903368-Electronics Laboratory Experiment 3-Feb-2017

... To investigate how clipper circuit using diodes is working. To investigate how clamper circuit utilizing a capacitor with diode is working. To see how diodes could work in logical AND and OR gates. ...
Audio Interconnect Cables
Audio Interconnect Cables

ECOTAP VPD The new compact class for distribution transformers
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... distribution transformer intervenes and restores the voltage to a level which is ideal for consumption. This enables energy costs to be reduced by up to fifteen percent. Dispersed generation plants – economically complying with grid connection conditions. For integration into the grid, dispersed ge ...
C6200 GENCONTROLLER Installation Manual
C6200 GENCONTROLLER Installation Manual

Vout Vdd Vss 50 ohms - + 2 pF 500 ohms 500 ohms
Vout Vdd Vss 50 ohms - + 2 pF 500 ohms 500 ohms

™ High-Performance, JFET-Input AUDIO OPERATIONAL AMPLIFIERS OPA1641 OPA1642
™ High-Performance, JFET-Input AUDIO OPERATIONAL AMPLIFIERS OPA1641 OPA1642

... network and therefore no additional noise contributions). The OPA1641, OPA1642, and OPA1644 are shown with total circuit noise calculated. The op amp itself contributes both a voltage noise component and a current noise component. The voltage noise is commonly modeled as a time-varying component of ...
Experiment 16-1 – Basic Direct Current (DC) Equipment
Experiment 16-1 – Basic Direct Current (DC) Equipment

design and construction of a single phase automatic face change
design and construction of a single phase automatic face change

... supply. In this case 160V is the limit, which the system changes over from public supply or generator. The sensor stage monitors the unregulated voltage dropped across R1 and R2 as shown in Fig. 2. The voltage feeds an input on IC1 which compares this input with a fixed reference across VR1. The dro ...
Signal Encoding Techniques
Signal Encoding Techniques

... midbit transition serves as clock and data low to high transition represents a 1 high to low transition represents a 0 used by IEEE 802.3 ...
Longitudinal Painting
Longitudinal Painting

... the incoming bunches, the idea is to modulate the portion of the bucket length that gets populated on each turn. ...
High-Side Measurement Current Shunt Monitor.
High-Side Measurement Current Shunt Monitor.

An example of positive feedback op amp circuit: Schmitt Trigger In
An example of positive feedback op amp circuit: Schmitt Trigger In

THE L6569: A NEW HIGH VOLTAGE IC DRIVER FOR
THE L6569: A NEW HIGH VOLTAGE IC DRIVER FOR

... positive temperature coefficient thermistor (PTC) in parallel with the lamp achieves the task by adjusting both the filament current and the preheat duration. The board uses a 150Ω PTC with two 8.2 nF capacitors. The preheat lasts 0.8s and the filament current is 0.45 Arms. The PTC is a cheap device ...
LT1580(-2.5) - Linear Technology
LT1580(-2.5) - Linear Technology

... The LT1580 has improved frequency compensation which permits the use of capacitors with very low ESR. This is critical in addressing the needs of modern, low voltage, high speed microprocessors. Current generation microprocessors cycle load current from several hundred milliamperes to several ampere ...
DS1090 Low-Frequency, Spread-Spectrum EconOscillator General Description
DS1090 Low-Frequency, Spread-Spectrum EconOscillator General Description

... Spread-spectrum functionality is achieved by a userconfigurable divider (determines dither rate), a triangle generator, and a user-configurable dither amplitude circuit (see Block Diagram). The input to the triangle-wave generator is derived from the internal master oscillator and is fed through a u ...
The Yaesu FT200
The Yaesu FT200

... to power amplifier V6/V7, 2 x 6JS6A, and to the aerial. Power amplifier V6/V7 operates in class AB2 for maximum power output. The AC audio component of PA grid current, when overdriven by signal peaks, is rectified by diodes D4/D5 to provide an ALC (Automatic Level Control) voltage to the IF amplifi ...
IOSR Journal of VLSI and Signal Processing (IOSR-JVSP)
IOSR Journal of VLSI and Signal Processing (IOSR-JVSP)

The Product Detector
The Product Detector

AN1318 Interfacing Semiconductor Pressure Sensors
AN1318 Interfacing Semiconductor Pressure Sensors

... measurement depends directly on the tolerance of the bias supply. It also provides a convenient means for temperature compensation. The bridge resistors are silicon resistors that have positive temperature coefficients. Therefore, when they are placed in series with zero TC temperature compensation ...
Supporting online material
Supporting online material

... experienced before measurements. In order to minimize the threshold voltage variation caused by hysteresis, we used exactly the same condition (relatively quick gate voltage sweeping rate of 500 mV/s was used to minimize the mobile ion effect) to test all the devices presented in Fig. 2b main panel ...
MAX14606/MAX14607 Overvoltage Protectors with Reverse Bias
MAX14606/MAX14607 Overvoltage Protectors with Reverse Bias

... faults up to +36V. When the input voltage exceeds the overvoltage threshold, the internal FET is turned off to prevent damage to the protected components. The devices automatically choose the accurate internal trip thresholds. The internal OVLO are preset to typical 5.87V (MAX14606) or 6.8V (MAX1460 ...
REU Poster - CURENT Education
REU Poster - CURENT Education

... As seen below, the switching period of silicon is about thirteen times larger than GaN. When compared to the real switching speed of GaN, the simulation is about 1.3ns too fast, but in either case the considerable difference in switching speed when compared to silicon is still valid. ...
Low Power, 350 MHz Voltage Feedback Amplifiers AD8038/AD8039
Low Power, 350 MHz Voltage Feedback Amplifiers AD8038/AD8039

in the primary coil
in the primary coil

... power is sent across long transmission lines at ______ HIGH voltages. WHY? If the voltage is high, the current will be relatively ____, low so there will be less power loss in the lines. ...
< 1 ... 1309 1310 1311 1312 1313 1314 1315 1316 1317 ... 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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