Patent ID: 7876600
Filing Date: 2011-01-25
Classification: G11C,Y10T

Abstract:
1. A static random access memory, comprising: a tracking column, comprising a plurality of first memory cells; a normal column, comprising a plurality of second memory cells; a cell voltage control circuit, coupled to the tracking column and the normal column for connecting an operation voltage to the tracking column and the normal column before a write operation of the static random access memory starts and for disconnecting the operation voltage from the tracking column and the normal column after the write operation starts; and a cell voltage pull-down circuit, coupled to the tracking column and the normal column for pulling down cell voltages of the tracking column and the normal column after the write operation starts and for ceasing pulling down the cell voltage of the normal column when the cell voltage of the tracking column drops down to a predetermined voltage, wherein the cell voltage control circuit connects the operation voltage ad the tracking column according to a global write enable signal, and the cell voltage control circuit connects the operation voltage and the normal column according to a column write enable signal.