Static information storage and retrieval – Floating gate – Particular biasing
Patent
1999-02-04
2000-10-03
Hoang, Huan
Static information storage and retrieval
Floating gate
Particular biasing
3651852, 36518525, 36518907, G11C 1606
Patent
active
06128226&
ABSTRACT:
A method for sensing a close to ground signal recieved from an array cell within a memory array includes the steps of providing a reference unit with a reference cell having a similar structure and a similar current path therethrough to that of the array cell, providing a timing unit with a timing cell having a similar structure and a similar current path therethrough to that of the array cell, discharging the array, the reference unit and the timing unit prior to charging them, generating a cell signal, a reference signal and a timing signal, respectively, upon charging, generating a read signal when the timing signal at least reaches a predefined voltage level and generating a sensing signal from the difference of the cell and reference signals once the read signal is generated. The reference unit has a reference capacitance which is a multiple of the expected capacitance of a bit line of the array and the timing unit has a predefined timing capacitance.
REFERENCES:
patent: 4916671 (1990-04-01), Ichiguchi
patent: 5812456 (1998-09-01), Hull et al.
patent: 5936888 (1999-08-01), Sugawara
Dadashev Oleg
Eitan Boaz
Hoang Huan
MacPherson Alan H.
Matsubayashi Hugh H.
Saifun Semiconductors Ltd.
Tower Semiconductors Ltd.
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