International Business Machines Corporation

Mark E Anderson, Ii

Edward P Maciejewski

George E Smith, Iii

Chandrasekara Kothandaraman

Sundar Kumar Iyer

An identification circuit for establishing and sensing the state of a fusible element used in on chip identification of the chip's type comprising: a circuit establishing control signals for turning the identification circuit on and off; dual paths energized by the control signals generated by the level setting circuit to energize one path through the fusible element to provide a state level and the other path through a reference path which provides a reference voltage level which is distinguishable from both the blown and unblown states of the fusible element; a differential sensing circuit for comparing the reference voltage level to the state level to provide a signal indicating the state of the fusible element; and protection circuitry to protect the circuit during an operation in which the state of the fusible element is set.

Growing community of inventors

New York, NY, United States of America

Mark E Anderson, Ii