guard ring

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guard ring

[′gärd ‚riŋ]
(electricity)
A ring-shaped auxiliary electrode surrounding one of the plates of a parallel-plate capacitor to reduce edge effects.
(electronics)
A ring-shaped auxiliary electrode used in an electron tube or other device to modify the electric field or reduce insulator leakage; in a counter tube or ionization chamber a guard ring may also serve to define the sensitive volume.
(thermodynamics)
A device used in heat flow experiments to ensure an even distribution of heat, consisting of a ring that surrounds the specimen and is made of a similar material.
References in periodicals archive ?
In this respect, for example, the effects of a guard ring electrode on the operation of a capacitive transducer have been investigated [8].
Tenders are invited for Procurement of Seal Rings, Fins and Sealing strip for oil guard rings required for TG set of 210MW Unit.
Guard rings and via can be set-up through L-Edit's user interface or imported from a Virtuoso(R) technology file.
The Pyxis custom IC design platform is extended to handle fin grids and provide a fin grid display, and to support guard rings, MOS abutment rules and design rule-driven (DRD) layout.
The technology allows for integration of medium- and high-resistivity polysilicon resistors, medium- and high-voltage floating capacitors and deep, N+ doped guard rings.
New capabilities include device grouping with programmable guard rings, highly matched precision structures, multiple symmetry lines, and proximity matching.
Guard rings are typically used to reduce substrate coupling but overuse can mean wasted area and even an increase in the substrate noise observed by analog devices.