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A cryogenic semiconductor device in which a reverse-biased pn junction is used to control the ionization between two ohmic contacts.



Related Terms

PNPN DIODE

A semiconductor device consisting of four alternate layers of p-type and n-type semiconductor material, with terminal connections to the two outer layers. Also known as npnp diode.

PASSIVE AND GATE

A fluidic device which achieves an output signal, by stream interaction, only when both of two control signals appear simultaneously.

CURRENT-CONTROLLED SWITCH

A semiconductor device in which the controlling bias sets the resistance at either a very high or very low value, corresponding to the off'' and on'' conditions of a switch.

CUT-IN

  1. A value of temperature or pressure at which a control circuit closes. 2. An electrical device that allows current to flow through an electric circuit.

JOYSTICK

A two-axis displacement control operated by a lever or ball, for XY positioning of a device or an electron beam.

MANUAL RESET DEVICE

A component of a control which requires resetting by hand to restart after safe operating conditions have been restored.

FORMING

  1. Application of voltage to an electrolytic capacitor, electrolytic rectifier, or semiconductor device to produce a desired permanent change in electrical characteristics as a part of the manufacturing process. 2. A process for shaping or molding sheets, rods, or other pieces of hot glass, ceramic ware, plastic, or metal by the application of pressure.

EDUCTOR

  1. An ejector-like device for mixing two fluids. 2. See ejector.

TIME DELAY

A deliberate delay of a predetermined time in the action of a safety device or control.

MULTIPLEXER

A device for combining two or more signals, as for multiplex, or for creating the composite color video signal from its components in color television. Also spelled multiplexor.

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