Static information storage and retrieval – Floating gate – Particular connection
Reexamination Certificate
2006-04-04
2006-04-04
Lam, David (Department: 2827)
Static information storage and retrieval
Floating gate
Particular connection
C365S185010
Reexamination Certificate
active
07023729
ABSTRACT:
A microcomputer incorporating a flash memory which is erased and programmed electrically in a stable manner within a relatively wide range of external power supply voltages including those for low-voltage operations. The microcomputer comprises a voltage clamp unit including a reference voltage generating circuit and a constant voltage generating circuit. In operation, the voltage clamp unit generates a voltage of a low dependency on a supply voltage and clamps the generated voltage to a voltage level which, within a tolerable range, is lower than a single supply voltage externally furnished. This prevents voltages boosted by boosting circuits operating on the clamped voltage, i.e., programming and erasure voltages, from being dependent on the externally supplied voltage.
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Ishikawa Eiichi
Matsubara Kiyoshi
Saito Yasuyuki
Sato Masanao
Yada Naoki
Antonelli, Terry Stout and Kraus, LLP.
Lam David
Renesas Technology Corp.
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