Abstract: A super leakage current cut-off device for a ternary content addressable memory (TCAM) is provided. For various operations of the TCAM, the device uses the high-end and low-end power gating control transistors to turn on/off the don't-care cells to reduce the leakage current passing through the don't-care cells.

Abstract: In the proposed stored don't-care hierarchical search-line scheme, a content-addressable memory (CAM) is divided into several blocks. Each block contains a plurality of local search-lines, a global search-line, a buffer and a memory memory cell. Data are stored in the blocks in order according to the length of the prefix. Data with the longest prefix is stored at the bottommost, and its don't-care state is used as the control signal of the buffer to control whether to transfer the data on the global search-line to the local search-line or not. The local search-line then transfer the value into the memory cell. There is no complex control circuit and extra storage device needed. Moreover, because the control signal directly comes from the don't-care state, power consumption on search-lines can be effectively reduced with no increase of search delay.

Abstract: In the proposed stored don't-care hierarchical search-line scheme, a content-addressable memory (CAM) is divided into several blocks. Each block contains a plurality of local search-lines, a global search-line, a buffer and a memory cell. Data are stored in the blocks in order according to the length of the prefix. Data with the longest prefix is stored at the bottommost, and its don't-care state is used as the control signal of the buffer to control whether to transfer the data on the global search-line to the local search-line or not. The local search-line then transfer the value into the memory cell. There is no complex control circuit and extra storage device needed. Moreover, because the control signal directly comes from the don't-care state, power consumption on search-lines can be effectively reduced with no increase of search delay.

Abstract: The present invention discloses a butterfly match-line structure and a search method implemented thereby, wherein the parallelism of the match lines is increased to shorten the search time, and a butterfly-type connection is used to reduce the power consumption and achieve the best energy efficiency. Via the butterfly-type connection, information can be reciprocally transmitted between the parallel match lines, which are independent originally. When a miss case occurs, more succeeding memory cells will not be compared but will be turned off. Thereby, the power consumption is reduced. Further, XOR-based conditional keepers are used to reduce the matching time and the power consumption. Besides, such a circuit is also used to shorten the delay time of the butterfly-type connection.

Abstract: A storage device includes a housing case, a terminal connector, a circuit substrate and a base. The terminal connector, the circuit substrate, and the base are inserted, in this order, inside the housing case. The terminal connector has at least a contact terminal for circuit connection on the circuit substrate for data transmission when the terminal connector is connected to the circuit substrate. The base is engaged to the circuit substrate at the end, and tightly engaged inside the housing case. The base is not only used to steadily engage the terminal connector and the circuit substrate inside the housing case, but also to elevate the circuit substrate so that the circuit is not directly in contact with the housing case to cause short-circuit.

Abstract: A storage device includes a housing case, a terminal connector, a circuit substrate and a base. The terminal connector, the circuit substrate, and the base are inserted, in this order, inside the housing case. The terminal connector has at least a contact terminal for circuit connection on the circuit substrate for data transmission when the terminal connector is connected to the circuit substrate. The base is engaged to the circuit substrate at the end, and tightly engaged inside the housing case. The base is not only used to steadily engage the terminal connector and the circuit substrate inside the housing case, but also to elevate the circuit substrate so that the circuit is not directly in contact with the housing case, causing short-circuit.