Invention Grant
US07957197B2 Nonvolatile memory with a current sense amplifier having a precharge circuit and a transfer gate coupled to a sense node 有权
具有电流检测放大器的非易失性存储器具有预充电电路和耦合到感测节点的传输栅极

Nonvolatile memory with a current sense amplifier having a precharge circuit and a transfer gate coupled to a sense node
Abstract:
Sensing circuits for sensing a conduction current of a memory cell among a group of non-volatile memory cells being sensed in parallel and providing the result of the sensing to a data bus are presented. A precharge circuit is coupled to a node for charging the node to an initial voltage. An intermediate circuit is also coupled to the node and connectable to the memory cell, by which current from the precharge circuit can be supplied to the memory cell. The circuit also includes a comparator circuit to perform a determination of the conduction current by a rate of discharge at the node; a data latch coupled to the comparator circuit to hold the result of this determination; and a transfer gate coupled to the data latch to supply a latched result to the data bus independently of the node. This arrangement improves sensing performance and can help to eliminate noise on the analog sensing path during sensing and reduce switching current.
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