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  2. Lock-in amplifier - Wikipedia

    en.wikipedia.org/wiki/Lock-in_amplifier

    A lock in amplifier uses a multiplier and a low pass filter to compare a reference signal against a noisy signal. A lock-in amplifier is a type of amplifier that can extract a signal with a known carrier wave from an extremely noisy environment. Depending on the dynamic reserve of the instrument, signals up to a million times smaller than noise ...

  3. Power amplifier classes - Wikipedia

    en.wikipedia.org/wiki/Power_amplifier_classes

    Power amplifier classes. In electronics, power amplifier classes are letter symbols applied to different power amplifier types. The class gives a broad indication of an amplifier 's characteristics and performance. The first three classes are related to the time period that the active amplifier device is passing current, expressed as a fraction ...

  4. Amplifier figures of merit - Wikipedia

    en.wikipedia.org/wiki/Amplifier_figures_of_merit

    In practical design, the result of a tradeoff is the class AB design. Modern Class AB amplifiers commonly have peak efficiencies between 30 and 55% in audio systems and 50-70% in radio frequency systems with a theoretical maximum of 78.5%. Commercially available Class D switching amplifiers have reported efficiencies as high as 90%. Amplifiers ...

  5. Homodyne detection - Wikipedia

    en.wikipedia.org/wiki/Homodyne_detection

    Homodyne detection. In electrical engineering, homodyne detection is a method of extracting information encoded as modulation of the phase and/or frequency of an oscillating signal, by comparing that signal with a standard oscillation that would be identical to the signal if it carried null information. "Homodyne" signifies a single frequency ...

  6. United States Army Prime Power School - Wikipedia

    en.wikipedia.org/wiki/United_States_Army_Prime...

    In the Cable Splicing class students learn how to splice and terminate low and medium voltage power cables up to 15,000 volts; how to locate underground power cable by using a tracing tool and then find the location of the fault in the cable. The Transformer annex covers transformer theory, calculations and construction.

  7. Stanford Research Systems - Wikipedia

    en.wikipedia.org/wiki/Stanford_Research_Systems

    Stanford Research Systems is a maker of general test and measurement instruments. The company was founded in 1980, is privately held, and is not affiliated with Stanford University. Stanford Research Systems (SRS) manufactures all of their products at their Sunnyvale, California facility. SRS produces scientific and engineering instruments for ...

  8. Boxcar averager - Wikipedia

    en.wikipedia.org/wiki/Boxcar_averager

    A boxcar averager, gated integrator or boxcar integrator is an electronic test instrument that integrates the signal input voltage after a defined waiting time (trigger delay) over a specified period of time (gate width) and then averages over multiple integration results (samples) – for a mathematical description see boxcar function. Zurich ...

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

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