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Universal Decoupling Capacitor Design

IP.com Disclosure Number: IPCOM000039655D
Original Publication Date: 1987-Jul-01
Included in the Prior Art Database: 2005-Feb-01

Publishing Venue

IBM

Related People

Authors:
Mandava, BR Miller, RA [+details]

Abstract

This article describes the design and layout of a structured capacitor capable of decoupling power supply links for all types of switching circuits. This interdigital, multilayer ceramic capacitor structure incorporates four interconnected capacitors designed with a unique (Image Omitted) footprint allowing decoupling of one to four voltages. Capacitance per unit volume increases and decoupling points increase. Inherently lower inductance and impedance characteristics are derived from this design. Figs. 1 through 4 illustrate commonly-used transistor logic circuits (LVI, ECL, half current switch and a TTL switch) and their applicable capacitor wiring schematics. By means of the tab and plate configuration shown in Figs.