Compact distributed ladder attenuator

Wave transmission lines and networks – Attenuators

Reexamination Certificate

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C257S536000, C323S354000

Reexamination Certificate

active

07986197

ABSTRACT:
Simple and compact structures for an attenuator or resistor ladder can be implemented in a standard integrated circuit process as well as hybrid, thick or thin film ceramic processes, which allows metallization along with resistive components. The structure has the mathematical property that it attenuates an applied reference voltage logarithmically/exponentially along its length because of the natural solution of the Laplace equation for this type of geometry and contact configuration.

REFERENCES:
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patent: 4468607 (1984-08-01), Yamada et al.
patent: 5039961 (1991-08-01), Veteran
patent: 5637908 (1997-06-01), Lowther et al.
patent: 5969658 (1999-10-01), Naylor
patent: 7323933 (2008-01-01), Gilbert
patent: 2004/0169256 (2004-09-01), Kellner-Werdehausen et al.
patent: 2007/0200199 (2007-08-01), Murakami et al.
patent: 2008/0204299 (2008-08-01), Christ

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