Vierra Magen Marcus LLP
Apparatus and method for reducing noise generated from locked out sense circuits in a non-volatile memory system
A circuit includes selected sense circuits configured to be connected to selected bit lines and unselected sense circuits configured to be connected to unselected bit lines during a sense operation. When the sense circuit is connected to the unselected bit line during the sense operation, the sense circuit is locked out in order to reduce current consumption. However, noise from the locked out sense circuit may be transmitted to the sense circuits connected to the selected bit lines through adjacent bit line coupling. In order to reduce the effect of the noise, charge transfer from the sense node may be blocked from passing to the unselected bit lines. Or, charge may be drained from the sense node, thereby preventing the charge from passing to the unselected bit lines.
SanDisk Technologies LLC
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Huai-yuan Deepanshu Stanley Xiang Wei
Tseng Dutta Jeong Yang Zhao