The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 21, 1995
Filed:
Feb. 14, 1992
Michel Burri, Gd Saconnex, CH;
Motorola, Inc., Schaumburg, IL (US);
Abstract
A non-volatile memory cell including a pn diode and a circuit for sensing the logic state of the pn diode such that a logic one state indicates that the diode is in its normal state, while the other logic state is created by fusing the diode for creating a short circuit. The circuit for sensing the logic state of the diode includes a circuit for developing a sense voltage across the diode, a first comparator for comparing the sense voltage with a first reference voltage greater than the normal junction voltage, a second comparator for comparing the sense voltage with a second reference voltage less than the normal junction voltage but greater than the fused junction voltage and a circuit responsive to the outputs of the first and second comparators to provide an output signal which has a first value if the sense voltage is between the first and second reference voltages and a second value if the sense voltage is not between the first and second reference voltages.