Patent ID: 7787323
Filing Date: 2010-08-31
Classification: G11C

Abstract:
1. A circuit, comprising: a first fuse having a first terminal coupled to receive a program voltage, and a second terminal; a first program transistor having a first current electrode coupled to the second terminal of the first fuse, a second current electrode coupled to a first power supply voltage terminal, and a control electrode, wherein the first fuse is programmed when the first program transistor is conductive; a second fuse having a first terminal coupled to receive the program voltage, and a second terminal; a second program transistor having a first current electrode coupled to the second terminal of the second fuse, and a second current electrode coupled to the first power supply voltage terminal, and a control electrode, wherein the second fuse is programmed when the second program transistor is conductive; and a first detect circuit having an input coupled to the second terminal of the first fuse, and an output coupled to the control electrode of the first program transistor, the first detect circuit for detecting when a first predetermined level of fuse programming has been achieved for the first fuse during a fuse programming operation, and in response, the first detect circuit for causing the first program transistor to be substantially non-conductive, and for causing the second program transistor to become conductive.