Patent ID: 6693783
Filing Date: 2004-02-17
Classification: G11C

Abstract:
A trimming circuit for modifying electronic circuits, the trimming circuit comprising:a first input pad configured to receive a trigger signal; a delay structure coupled to the first input pad, the delay structure being configured to add a first delay to the trigger signal and to filter power and voltage spikes in the trigger signal; a transistor coupled to the delay structure, the transistor being configured to couple between a first voltage potential and an output node, the first delay being of a sufficiently long duration so as to decrease the switching speed of the transistor to allow the delay structure to filter power and voltage spikes in the trigger signal; and a trimming fuse having a first end and a second end, the first end being coupled with the output node, the second end being configured to couple to a second voltage potential, wherein the transistor supplies sufficient current to trim the trimming fuse when the transistor turns on, and wherein the trimming fuse decouples the output node from the second end of the trimming fuse when the trimming fuse is trimmed.