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EUP3408 1.5MHz, 800mA Synchronous Step-Down Converter with Soft Start
EUP3408 1.5MHz, 800mA Synchronous Step-Down Converter with Soft Start

... The EUP3408 is a constant frequency, current mode, PWM step-down converter. The device integrates a main switch and a synchronous rectifier for high efficiency. The 2.5V to 5.5V input voltage range makes the EUP3408 ideal for powering portable equipment that runs from a single cell Lithium-Ion (Li+) ...
Railway Track Pedestrian Crossing without using Staircase
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AD632 数据手册DataSheet 下载
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... configurations and is recommended for such applications). This range may be extended to 100:1 by simply reducing the X offset with an externally generated trim voltage (range required is ± 3.5 mV max) applied to the unused X input. To trim, apply a ramp of +100 mV to +V at 100 Hz to both X1 and Z1 ( ...
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... (d) Increase the resistive load by making the resistor 47kΩ instead of 10kΩ. Observe that the ripple decreases. Once again you may need to AC-couple and to increase the magnification of the DPO. Explain the advantage of the full-wave over the half-wave rectifier in making a stable power supply. In f ...
Electricity Distribution
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... Step-up transformers are mainly used in power transmission to increase voltage to reduce energy loss. Some household appliances (such as older style CRT TVs) also increase voltages using step-up transformers. Step-down transformers are used in electricity substations to reduce the voltage to 230 V f ...
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A308 Integrated Amplifier - Puerto Rico Suppliers .com

... With at least 150 watts per channel, huge current reserves and extremely low distortion over a very wide bandwidth and impedance range, the A308 dual mono integrated amplifier represents an extraordinarily high standard of performance. It used Musical Fidelity's latest circuit development, which tak ...
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... better choice is fiber optics. Fiber optics is a very important constituent of modern technology. The medical electronics finds numereous applications in the fiber optics field. In this project, we employ an optical fiber sensor that modulates the measured and yields variations in the electrical out ...
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... monitoring current leakage in generators. The T2900 measures the differential current of each of the 3 phases. The differential currents are measured by connecting a current transformer for each winding in parallel with inverse polarity. The highest of the 3 currents is selected and, if it exceeds t ...
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... (c) Flexible circuits can be fabricated using a process where silver ink is silk screened onto a flexible plastic sheet substrate. For an ink thickness of 15 µm, the resistivity is specified as ρ0 = 20 mΩ/sq. Calculate the resistance of a silver print trace that is 0.5 mm wide and 80 mm long. ...
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... 2. Control and data acquisition system topology Combining the features of the PC's with the one of distributed programmable microsystems in the studying of experimental processes or in the development of new scientific instruments we obtain many advantages. Distributed processing provides us speed a ...
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... (electrons, branches) which move more easily on a (conductor, insulator) than they do on a (conductor, insulator). A negatively charged object has (fewer, more) electrons than a neutral object. Current, which is the flow of (voltage, charge), flows from (high, low) voltage to (high, low) voltage. Th ...
The Schmitt Trigger
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... a comparatorapplication which switches the output negative when the input passes upward through a positive reference voltage. It then uses negative feedback to prevent switching back to the other state until the input passes through a lower threshold voltage, thus stabilizing the switching against r ...
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Opto-isolator



In electronics, an opto-isolator, also called an optocoupler, photocoupler, or optical isolator, is a component that transfers electrical signals between two isolated circuits by using light. Opto-isolators prevent high voltages from affecting the system receiving the signal. Commercially available opto-isolators withstand input-to-output voltages up to 10 kV and voltage transients with speeds up to 10 kV/μs.A common type of opto-isolator consists of an LED and a phototransistor in the same opaque package. Other types of source-sensor combinations include LED-photodiode, LED-LASCR, and lamp-photoresistor pairs. Usually opto-isolators transfer digital (on-off) signals, but some techniques allow them to be used with analog signals.
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