Static information storage and retrieval – Floating gate – Particular biasing
Patent
1997-09-10
1999-06-15
Nelms, David
Static information storage and retrieval
Floating gate
Particular biasing
36518518, 36518521, G11C 1604
Patent
active
059128453
ABSTRACT:
A method for soft programming memory cells and floating gate memory device. During soft programming, a gate voltage is supplied to the control gate, a drain voltage it supplied to the drain, a well voltage is supplied to the well, and an active current limiter is coupled to the source. A circuit for soft programming supplies a gate voltage to the control gate, couples a constant current source to the drain, supplies a well voltage to the well, and supplies a source voltage to the source. The gate voltage may be approximately 2 V, the drain voltage may be approximately 4 V, and the well voltage may be approximately -2 V. According to another embodiment of the invention, the gate voltage is approximately 2 V lower than the drain voltage, and the well voltage is approximately 4 V lower than the gate voltage.
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Chen Chia-Shing
Chen Ming-Shang
Chou Ming-Hung
Lo Ying-Che
Lu Wenpin
Macronix International Co. Ltd.
Nelms David
Nguyen Tuan T.
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