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  2. Rectifier - Wikipedia

    en.wikipedia.org/wiki/Rectifier

    A rectifier used in high-voltage direct current (HVDC) power transmission systems and industrial processing between about 1909 to 1975 is a mercury-arc rectifier or mercury-arc valve. The device is enclosed in a bulbous glass vessel or large metal tub.

  3. Error correction code - Wikipedia

    en.wikipedia.org/wiki/Error_correction_code

    Low-density parity-check (LDPC) codes are a class of highly efficient linear block codes made from many single parity check (SPC) codes. They can provide performance very close to the channel capacity (the theoretical maximum) using an iterated soft-decision decoding approach, at linear time complexity in terms of their block length.

  4. Selenium rectifier - Wikipedia

    en.wikipedia.org/wiki/Selenium_rectifier

    An 8-plate 160 V 450 mA Federal brand selenium rectifier. A selenium rectifier is a type of metal rectifier, invented in 1933. [1] They were used in power supplies for electronic equipment and in high-current battery-charger applications until they were superseded by silicon diode rectifiers in the late 1960s.

  5. Online codes - Wikipedia

    en.wikipedia.org/wiki/Online_codes

    High level view of the use of online codes. The online encoding algorithm consists of several phases. First the message is split into n fixed size message blocks. Then the outer encoding is an erasure code which produces auxiliary blocks that are appended to the message blocks to form a composite message. From this the inner encoding generates ...

  6. Diode bridge - Wikipedia

    en.wikipedia.org/wiki/Diode_bridge

    This is an accepted version of this page This is the latest accepted revision, reviewed on 8 October 2024. Circuit arrangement of four diodes Diode bridge Diode bridge in various packages Type Semiconductor Inventor Karol Pollak in 1895 Electronic symbol 2 alternating-current (AC) inputs converted into 2 direct-current (DC) outputs A hand-made diode bridge. The silver band on the diodes ...

  7. Active rectification - Wikipedia

    en.wikipedia.org/wiki/Active_rectification

    Whereas normal semiconductor diodes have a roughly fixed voltage drop of around 0.5 to 1 volts, active rectifiers behave as resistances, and can have arbitrarily low voltage drop. Historically, vibrator -driven switches or motor-driven commutators have also been used for mechanical rectifiers and synchronous rectification.

  8. Silicon controlled rectifier - Wikipedia

    en.wikipedia.org/wiki/Silicon_controlled_rectifier

    A silicon controlled rectifier or semiconductor controlled rectifier is a four-layer solid-state current-controlling device. The name "silicon controlled rectifier" is General Electric 's trade name for a type of thyristor .

  9. Rectifier (neural networks) - Wikipedia

    en.wikipedia.org/wiki/Rectifier_(neural_networks)

    Plot of the ReLU (blue) and GELU (green) functions near x = 0. In the context of artificial neural networks, the rectifier or ReLU (rectified linear unit) activation function [1] [2] is an activation function defined as the non-negative part of its argument, i.e., the ramp function: