Integrated circuit resistance ladder.

摘要

A resistance ladder having a plurality of resistance branches in an integrated circuit chip, including a layer of resistive material (10) defining a plurality of discrete linear segments (12) and a plurality of connector tabs (14) extending from each of the linear segments at predetermined intervals for defining each resistance branch: wherein the layer of resistive material further defines a number of curvilinear segments (16) for connecting the linear segments to provide a continuous resistive material layer for defining said resistance ladder. Each curvilinear segment is approximately a segment of a circle. The resistive material layer also defines a plurality of connector tabs (18) extending from each curvilinear segment; with the angular separation of the tabs being approximately defined bywherein R is the resistance required for each leg of the resistance ladder;
p is the sheet resistance of the resistive material;r, is the inner radius of said circle; andr2 is the outer radius of said circle.