Invention Grant
- Patent Title: Memory array with reduced charging current
- Patent Title (中): 具有降低充电电流的存储器阵列
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Application No.: US992379Application Date: 1997-12-17
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Publication No.: US5847986APublication Date: 1998-12-08
- Inventor: Martin Brox
- Applicant: Martin Brox
- Applicant Address: DEX Munich
- Assignee: Siemens Aktiengesellschaft
- Current Assignee: Siemens Aktiengesellschaft
- Current Assignee Address: DEX Munich
- Main IPC: G11C11/41
- IPC: G11C11/41 ; G11C7/18 ; G11C11/401 ; G11C11/409 ; H01L21/8242 ; H01L27/108 ; G11C5/06
Abstract:
The spacing of the bit lines and/or the master bit lines (MBLs) of a memory array is skewed to decrease the charging current required to precharge the bit-lines and or the master bit lines. In one embodiment of the invention, an integrated circuit (IC) includes an array of memory cells arranged in rows and columns, with a pair of bit lines (BLTi and BLCi) per column of memory cells with BLTi carrying the cell data and BLCi its complement. The bit lines are disposed within a first level of the IC and run generally parallel to each other wherein there is a certain capacitance, CINT, between each two paired bit lines (BLTi and BLCi) and a capacitance, CEXT, between the bit lines of adjacent columns. The bit lines are coupled to selected MBLs with the MBLs being paired so that one MBL of a pair (MBLT) carries bit line data and the other MBL of a pair (MBLC) carries the complement of that bit line data. The MBLs are formed on a second level of the IC and run generally parallel to each other wherein there is a capacitance (MCINT) between the two paired master bit lines and a capacitance (MCEXT) between the master bit lines of a pair and the adjacent master bit lines. The spacing between the bit lines is skewed in order to decrease CINT relative to CEXT, and/or the spacing between the MBLs is skewed in order to decrease MCINT relative to MCEXT.
Public/Granted literature
- US5358322A Drawer locking system Public/Granted day:1994-10-25
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