| 摘要 |
A sense amplifier for a content addressable memory (CAM) device can utilize charge sharing between a match line and a pseudo-supply line to indicate a mis-match indication. A sense amplifier ( 200 ) can include match line ( 202 ) that can be precharged to a high supply potential (VCC), a sense node ( 206 ), and a pseudo-VSS (PVSS) line ( 204 ) that can be precharged to a low supply potential (VSS). In a match result, match line ( 202 ) can remain precharged, keeping sense device (P 2 ) turned off, and sense node ( 206 ) remains low, generating a low output signal (SAOUT). In a mis-match result, match line ( 202 ) and sense node ( 206 ) can be equalized. A resulting drop in match line ( 202 ) potential can turn on sense device (P 2 ), and sense node ( 206 ) can be pulled high. As a result, output signal (SAOUT) can be driven high.
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