Dictionary: JESD88

Acoustic data collected along an X-Z or Y-Z plane versus depth (Z) using a reflective acoustic microscope. A B-mode scan contains amplitude and phase/polarity information as a function of time of flight at each point along the scan line. A B-mode scan furnishes a two-dimensional (cross-sectional) description along a scan line (X or Y).

Example of B-mode display (bottom half of picture on left)

J-STD-035, 5/99

Acoustic data collected in an X-Y plane at depth Z using a reflective acoustic microscope. A C-mode scan contains amplitude and phase/polarity information at each point in the scan plane. A C-mode scan furnishes a two-dimensional (area) image of echoes arising from reflections at a particular depth (Z).

Example of C-mode display

J-STD-035, 5/99

Acoustic data collected in an X-Y plane throughout the depth (Z) using a through-transmission acoustic microscope. A through-transmission mode scan contains only amplitude information at each point in the scan plane. A through-transmission scan furnishes a two-dimensional (area) image of transmitted ultrasound through the complete thickness/depth (Z) of the sample or component.

Example of through-transmission display

J-STD-035, 5/99

The excess free energy over the ground state that must be acquired by an atomic or molecular system in order that a particular process can occur.

NOTE The activation energy is used in the Arrhenius equation for the thermal acceleration of physical reactions. The term "activation energy" is not applicable when describing thermal acceleration of time-to-failure distributions.

JEP122C, 3/06
JESD85, 7/01
JESD91A, 8/01

See "circuit element, active".

Desiccant that is either fresh (new) or has been baked according to the manufacturer's recommendations to renew it to original specifications.

J-STD-033B, 10/05

A device in which at least one circuit element is an active circuit element.

JESD99B, 5/07

See "circuit element, active".

A bipolar (three-state or totem-pole) output whose source-current capability significantly exceeds its sink-current capability.

JESD99B, 5/07

A bipolar (three-state or totem-pole) output whose sink-current capability significantly exceeds its source-current capability.

JESD99B, 5/07

The time it takes for the structure resistance to reach or exceed R_fail while the structure is under stress from the isothermal test algorithm.

JESD61#, 4/97

See "analog-to-digital [A/D] converter".

(1) A character or group of characters that identifies a register, a particular part of storage, or some other data source or destination. (Ref. ANSI X3.172.)

(2) To refer to a device or a data item by its address. (Ref. ANSI X3.172.)

JESD100-B, 12/99

The pins that are multiplexed three ways to serve as address input, data input, and data output pins. When the address data input/output numbering is significant for device operation, the addresses are numbered beginning with 0.

JESD21-C, 1/97

Those inputs that select (address) a particular cell or set of cells within a memory array for presentation on the device outputs. The integer (n) serves to differentiate the address inputs, one from another. When the address number is significant for device operation, the addresses are numbered beginning with 0.

JESD21-C, 1/97

An input that, when true, allows the input address to be entered into a register and, when false, causes the address state previously entered to be latched.

JESD21-C, 1/97

A register that is used to hold an address. (Ref. IEC 824.)

JESD100-B, 12/99

See "address data input/output".

A source of charged air molecules (ions).

JESD625-A, 12/99

See "address latch enable".