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  2. Zigzag transformer - Wikipedia

    en.wikipedia.org/wiki/Zigzag_transformer

    A conventional six-winding, grounding transformer or zigzag bank, [1] with the same winding and core quantity as a conventional three-phase transformer, can also be used in zigzag winding connection. In all cases the first coil on each zigzag winding core is connected contrariwise to the second coil on the next core.

  3. Two-phase electric power - Wikipedia

    en.wikipedia.org/wiki/Two-phase_electric_power

    A simplified diagram of a two-phase alternator [1] Two-phase electrical power was an early 20th-century polyphase alternating current electric power distribution system. Two circuits were used, with voltage phases differing by one-quarter of a cycle, 90°. Usually circuits used four wires, two for each phase.

  4. Dumble Amplifiers - Wikipedia

    en.wikipedia.org/wiki/Dumble_Amplifiers

    A few Dumble amps have a Dumbleator circuit built in, but most have "un-buffered" input jacks that tap directly out of the pre-amp and into the power amp. Dumble likely created this external loop because of the difficulty of fitting effects loop buffering into the amplifier chassis (and the limited use of effects loops for most players).

  5. Three-phase electric power - Wikipedia

    en.wikipedia.org/wiki/Three-phase_electric_power

    Three-phase transformer with four-wire output for 208Y/120 volt service: one wire for neutral, others for A, B and C phases. Three-phase electric power (abbreviated 3ϕ [1]) is a common type of alternating current (AC) used in electricity generation, transmission, and distribution. [2]

  6. Current mirror - Wikipedia

    en.wikipedia.org/wiki/Current_mirror

    If the collector base reverse bias on Q 2 is increased by increasing the applied voltage V A, the current in Q 2 increases, increasing V 2 and decreasing the difference V 1 − V 2 entering the op amp. Consequently, the base voltage of Q 2 is decreased, and V BE of Q 2 decreases, counteracting the increase in output current. If the op-amp gain ...

  7. Cell bank - Wikipedia

    en.wikipedia.org/wiki/Cell_bank

    A cell bank is a facility that stores cells of specific genome for the purpose of future use in a product or medicinal needs, but can also describe the entity of stored cells itself. Cell banks often contain expansive amounts of base cell material that can be utilized for various projects.

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