Content addressable memory
A technology for addressing memory and content, applied in the field of memory, can solve problems such as complex timing control and strict timing requirements of comparison circuits
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[0056] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0057] Such as figure 2 As shown, in the first embodiment of the present invention, the CAM core unit includes a storage unit 111 storing one bit of data and a comparison circuit unit 212 . Among them, the storage unit 111 and Figure 1A The storage unit 111 of the content-addressable memory core unit shown in the prior art is the same, including: two cross-coupled inverters 121 and 122, node D stores one bit of data, and node D To store the complementary value of the bit data, the gates of transistors 131 and 132 are both coupled to word line 141 (WL), and transistors 131 and 132 are also coupled to bit line (BL) 142 and complementary bit line respectively 143. figure 2 The N-type MOS transistor 233 and the N-type MOS transistor 234 in the comparison circuit unit 212 are shown in series, and are respectively coupled to the sear...
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