发明名称 |
CIRCUIT FOR DECODING VARIABLE-LENGTH CODE, AND SYSTEM FOR DECODING VARIABLE-LENGTH CODE WHICH USES THE CIRCUIT. |
摘要 |
<p>A circuit comprising a pair of a CAM cell (10) for storing variable-length codes and a RAM cell (20) for storing data used for mask processing. This circuit further has an NMOS (30) which is connected between the CAM cell (10) and a match line ML, and cuts off the CAM cell (10) from the match line ML by use of the output of the RAM cell (20). The CAM cell (10) checks a code applied from the outside with the code stored in it. If these codes are agreed with each other, the CAM cell (10) outputs an H level signal which represents the agreement to the match line ML. If disagreed, it outputs an L level signal which represents the disagreement to the match line ML. If the CAM cell does not engage in the checking operation, the corresponding RAM cell (20) outputs an L level signal to turn off the NMOS (30). When the NMOS is turned off, the output from the CAM cell (10) is not transmitted to the match line ML. <IMAGE></p> |
申请公布号 |
EP0646932(A1) |
申请公布日期 |
1995.04.05 |
申请号 |
EP19940912701 |
申请日期 |
1994.04.19 |
申请人 |
OKI ELECTRIC INDUSTRY COMPANY, LIMITED |
发明人 |
KOMOTO, EIJI, OKI ELECTRIC INDUSTRY CO., LTD.;NAKAMURA, TAKAO, OKI ELECTRIC INDUSTRY CO., LTD. |
分类号 |
G11C11/00;G11C15/00;G11C15/04;H03M7/42;(IPC1-7):G11C15/04 |
主分类号 |
G11C11/00 |
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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