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Rocktron
Rocktron

... • All warnings on this equipment and in the operating instructions should be adhered to and all operating instructions should be followed. • Do not use this equipment near water. Care should be taken so that objects do not fall and liquids are not spilled into the unit through any openings. • The po ...
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- DARA SWITCHBOARDS

305-261/262 Measurement Laboratory
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... between the transmitting fibers and the reflective object the cone of emitted light coincides with the angle of view of the receiving fibers that capture most of the reflected light. Therefore, the detector shows the maximum sensitivity. However, the further increase of the distance between the fibe ...
Study the characteristics of negative feedback amplifiers and design
Study the characteristics of negative feedback amplifiers and design

... Analog System Lab Kit PRO ...
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- Krest Technology

... power loss due to leakage inductance. Recently, DC micro-grid gets major importance because of the significant increase in DC loads and demand of high quality power. These DC loads require different voltage levels based on their power ratings. Photo voltaic source (PV) is one of the prime source of ...
CAT3637 - 6-Channel Programmable High Efficiency LED Driver
CAT3637 - 6-Channel Programmable High Efficiency LED Driver

... inclusion of a 1.33x fractional charge pump mode increases device efficiency by up to 10% over traditional 1.5x charge pumps with no added external capacitors. Low noise input ripple is achieved by operating at a constant switching frequency which allows the use of small external ceramic capacitors. ...
MAX761/MAX762 12V/15V or Adjustable, High-Efficiency, Low I , Step-Up DC-DC Converters
MAX761/MAX762 12V/15V or Adjustable, High-Efficiency, Low I , Step-Up DC-DC Converters

... (MAX762), or they can be set with two external resistors. With a 5V input, the MAX761 guarantees a 12V, 150mA output. Its high efficiency, low supply current, fast start-up time, SHDN controlling capability, and small size make the MAX761 ideal for powering flash memory. The MAX761/MAX762 have an in ...
Layer 1 silicon sensor specifications for D0 SMTII
Layer 1 silicon sensor specifications for D0 SMTII

... delivered sensors, these measurements will be confirmed by independent measurements at Fermi National Accelerator Laboratory or at universities. Based upon the results of these measurements, we reserve the right to reject a sensor within 6 months after delivery. The manufacturer will be notified and ...
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... • Physically, what’s happening is that the final charge cannot be placed on a capacitor instantly. • Initially, the voltage drop across an uncharged capacitor = 0 because the charge on it is zero ! (V=Q/C) • As current starts to flow, charge builds up on the capacitor, the voltage drop is proportion ...
Intrinsically safe distribution box RSI-iss
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... The RSI-iss type distribution box with line separator is suitable for galvanic separation of line sections connecting the loudspeaking GTL (GTL/w) communication devices. The box is installed in the line, each 8 maximum GTL (GTL/w) devices cooperating within one control circuit. This box separates tw ...
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Electrical Quantities and Ohm`s Law

... The resistance created causes heat in the conductor when current flows through it; that is why a wire becomes warm when current flows through it. The higher the resistance of a conductor, the greater its opposition to current flow. The elements of an electric range become hot and the filament of an ...
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CC1000 Brochure

... A unique UHF RF Transceiver The CC1000 is a true single-chip UHF transceiver designed for very low power consumption and low voltage operation. Based on a pure 0.35 μm CMOS technology, the CC1000 RF transceiver offers a unique combination of low cost and high integration, performance and flexibility ...
Electrolink no.6 - guidance for interference with supply
Electrolink no.6 - guidance for interference with supply

... on the magnitude of the voltage change and the frequency of occurrence. Voltage depressions of less than 0.5% may cause complaints if the repetition rate is about 10 times per second. However, where the cause of the voltage depressions is infrequent (ie occurs at intervals of more than 2 hours) then ...
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... are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor doe ...
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AD8042

... The AD8042 is a low power voltage feedback, high speed amplifier designed to operate on +3 V, +5 V, or ±5 V supplies. It has true single-supply capability with an input voltage range extending 200 mV below the negative rail and within 1 V of the positive rail. ...
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... hardened to prevent single event transients (SETs) in excess of 1V for LETs up to 36MeV/mg/cm2. The ISL7124SRH has been specifically designed and manufactured to provide highly reliable performance in harsh radiation environments. It is total dose hardened to 300krad(Si) and offers guaranteed perfor ...
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Power Monitoring Technology

... The sample rate has a large impact on the ability of a device to correctly identify variations in the wave shape. Low sample rates are not suitable for any measurement where high accuracy is required or where there may be concerns about harmonics, low power factor or any other power quality phenomen ...
Dual-mode Multiphase Sinusoidal Oscillator using CDBAs
Dual-mode Multiphase Sinusoidal Oscillator using CDBAs

... widely used for realizing the multiphase sinusoidal waveforms [6] due to their commercial availability. However, circuit synthesis techniques in current domain using current conveyors [7], current followers [8] and operational transductance amplifiers [9] have gained substantial interests. The main ...
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... At power-up, the A8440 starts operation in 1x mode. If it is able to drive the programmed LED current, it continues to operate in 1x mode. If the battery voltage drops to a level where the LED current cannot be met, the driver automatically switches into 1.5x mode. The 1.5x charge pump will boost th ...
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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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