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  2. Amplifier - Wikipedia

    en.wikipedia.org/wiki/Amplifier

    An amplifier, electronic amplifier or (informally) amp is an electronic device that can increase the magnitude of a signal (a time-varying voltage or current). It is a two-port electronic circuit that uses electric power from a power supply to increase the amplitude (magnitude of the voltage or current) of a signal applied to its input ...

  3. Mechanical amplifier - Wikipedia

    en.wikipedia.org/wiki/Mechanical_amplifier

    A mechanical amplifier or a mechanical amplifying element is a linkage mechanism that amplifies the magnitude of mechanical quantities such as force, displacement, velocity, acceleration and torque in linear and rotational systems. [1]

  4. Gain (electronics) - Wikipedia

    en.wikipedia.org/wiki/Gain_(electronics)

    The power gain can be calculated using voltage instead of power using Joule's first law = /; the formula is: = ⁡ . In many cases, the input impedance and output impedance are equal, so the above equation can be simplified to:

  5. Log amplifier - Wikipedia

    en.wikipedia.org/wiki/Log_amplifier

    A log amplifier, which may spell log as logarithmic or logarithm and which may abbreviate amplifier as amp or be termed as a converter, is an electronic amplifier that for some range of input voltage has an output voltage approximately proportional to the logarithm of the input:

  6. Glossary of physics - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_physics

    By definition, it is the amount of energy gained by the charge of a single electron moved across an electric potential difference of one volt. electronegativity A chemical property that describes the tendency of an atom or a functional group to attract electrons (or electron density) towards itself. electronics

  7. Operational amplifier - Wikipedia

    en.wikipedia.org/wiki/Operational_amplifier

    An operational amplifier (often op amp or opamp) is a DC-coupled electronic voltage amplifier with a differential input, a (usually) single-ended output, [1] and an extremely high gain. Its name comes from its original use of performing mathematical operations in analog computers .

  8. Quantum amplifier - Wikipedia

    en.wikipedia.org/wiki/Quantum_amplifier

    In physics, a quantum amplifier is an amplifier that uses quantum mechanical methods to amplify a signal; examples include the active elements of lasers and optical amplifiers. The main properties of the quantum amplifier are its amplification coefficient and uncertainty. These parameters are not independent; the higher the amplification ...

  9. Power amplifier classes - Wikipedia

    en.wikipedia.org/wiki/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 of the period of a ...