Patent ID: 9384836
Filing Date: 2016-07-05
CPC Classification: G11C

Claim Text:
1. A content addressable memory comprising: a data memory cell for storing a data bit; a mask memory cell for storing a mask bit; and a comparing and readout unit connected to at least one read word line for receiving at least one read word signal, connected to at least one function bit line for receiving a search bit signal, and connected to the data memory cell and the mask memory cell for receiving the data bit and the mask bit, wherein said at least one function bit line includes a pair of search bit lines; wherein the data memory cell is connected to a data-use write word line for receiving a data-use write word signal, the mask memory cell is connected to a mask-use write word line for receiving a mask-use write word signal, so as to decide whether a write bit signal can be written into the data bit and the mask bit through a pair of write bit lines; wherein the comparing and readout unit compares the data bit, the mask bit and the search bit signal, so as to determine whether they match each other; wherein the comparing and readout unit decides whether the data bit and the mask bit can be read out according to the at least one read word signal; and wherein the comparing and readout unit includes: