Patent ID: 6514799
Filing Date: 2003-02-04
Classification: H01L,H03M

Abstract:
A method for noise distribution in high resistivity substrates containing differential or balanced integrated circuitry, comprising the steps of:making noise from an existing noise source isotropic in relation to branches of the differential or balanced integrated circuitry by creating at least one low resistivity path adjacent to each pair of integrated transistors or group of transistors forming the differential or balanced integrated circuitry, the low resistivity path being symmetrical in relation to said each pair of integrated transistors or group of transistors forming the differential or balanced integrated circuitry thereby forming noise distributors for evenly distributing noise present; providing noise distributing structure forming a floating substrate contact of the same doping kind as a substrate or a well, within which the differential or balanced circuitry is contained, the noise distributing structure having no connections to nodes of the differential or balanced integrated circuitry and not needing to be continuous as long as a set of noise distributing low resistivity paths are maintained adjacent to each pair of integrated transistors or group of transistors forming the differential or balanced integrated circuitry.