发明名称 |
Read only memory devices with independently precharged virtual ground and bit lines |
摘要 |
Read only memory(ROM) integrated circuit devices include a ROM cell block. A plurality of virtual ground lines and bit lines are coupled to the ROM cell block. A precharge circuit, including a virtual ground line precharge controller, virtual ground line precharging unit, bit line precharge controller and bit line precharging unit, independently controls timing of precharging the virtual ground lines and the bit lines. The precharge circuit may be configured to deactivate precharging of the virtual ground lines before deactivating precharging of the bit lines. Precharging of the virtual ground lines may be deactivated substantially concurrently with activation of discharging of the virtual ground lines.
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申请公布号 |
US2005057990(A1) |
申请公布日期 |
2005.03.17 |
申请号 |
US20040910669 |
申请日期 |
2004.08.03 |
申请人 |
CHOO YONG-JAE;PARK IN-GYU |
发明人 |
CHOO YONG-JAE;PARK IN-GYU |
分类号 |
G11C7/00;G11C7/12;G11C17/12;(IPC1-7):G11C7/00 |
主分类号 |
G11C7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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