Flash memory with improved erasability and its circuitry

Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Amplitude control

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Details

327534, 36518527, 36518529, H03K 508

Patent

active

057709637

ABSTRACT:
A flash memory performs channel erasing or source erasing by applying a negative voltage to a control gate. The device includes a voltage restriction device which restricts the negative voltage to be applied to the control gate so that the negative voltage will be a constant value relative to the voltage of the channel or source. Alternatively, two voltage restricting devices restrict the negative voltage applied to the control gate and the voltage to be applied to the source so that the voltages will be a constant value relative to a common reference voltage.

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