Static information storage and retrieval – Read only systems – Fusible
Reexamination Certificate
2005-04-05
2005-04-05
Le, Vu A. (Department: 2824)
Static information storage and retrieval
Read only systems
Fusible
C365S207000, C365S208000
Reexamination Certificate
active
06876566
ABSTRACT:
A differential non-volatile memory device is provided that includes setting means, at least first and second OTP memory cells that are each coupled between a supply voltage and a reference voltage, and a read circuit forming a first current path between the first memory cell and the reference voltage and a second current path between the second memory cell and the reference voltage for reading the bit and the complementary bit that are stored in the first and second memory cells. The first current path includes a first circuit point that is associated with a first output terminal, and the second current path includes a second circuit point that is associated with a second output terminal. The setting means can be activated to bring the first and second circuit points to a voltage value that is substantially equal to the reference voltage, and is able to set the value of the current flowing through each of the first and second current paths. Also provided is a method for reading such a differential non-volatile memory device.
REFERENCES:
patent: 4787047 (1988-11-01), Wei
patent: 5949703 (1999-09-01), Shibata et al.
patent: 6430101 (2002-08-01), Toda
Pasolini Fabio
Tronconi Michele
Bongini Stephen
Fleit Kain Gibbons Gutman Bongini & Bianco P.L.
Jorgenson Lisa K.
Le Vu A.
STMicroelectronics S.r.l.
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