Static information storage and retrieval – Floating gate – Particular biasing
Reexamination Certificate
2007-11-15
2009-06-30
Nguyen, Viet Q (Department: 2827)
Static information storage and retrieval
Floating gate
Particular biasing
C365S185200, C365S201000, C365S189090
Reexamination Certificate
active
07554849
ABSTRACT:
A nonvolatile semiconductor memory for setting control voltages to be supplied to an internal circuit, to an external reference voltage inputted from outside, has a parameter control circuit. The parameter control circuit causes a parameter register to sequentially output the plurality of parameters to a voltage generating control circuit. The parameter control circuit counts, for a fixed period of time, the number of oscillations of each of the trimming flag signals sequentially outputted from the voltage generating control circuit in response to the parameters. The parameter control circuit stores counted values corresponding to the parameters. The parameter control circuit selects the parameter having a maximum counted value as a parameter corresponding to the control voltage closest to the external reference voltage.
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patent: 5995429 (1999-11-01), Kojima et al.
patent: 6370075 (2002-04-01), Haeberli et al.
patent: 6944092 (2005-09-01), Kang
patent: 7277325 (2007-10-01), Fukuda et al.
patent: 2001-255948 (2001-09-01), None
Honma Mitsuaki
Isobe Katsuaki
Kabushiki Kaisha Toshiba
Nguyen Viet Q
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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