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Low-Capacitance and Charge-Shared Match Lines for Low-Energy High-Performance TCAMs
提出低电容和电荷共享匹配线技术，提升TCAM搜索速度并降低能耗
0.18μm CMOS, 42%搜索时间减少, 25%能耗降低
TCAM低能耗高性能电荷共享匹配线
▸低电容匹配线设计：通过优化匹配线的物理结构和材料选择，显著降低了匹配线的寄生电容，从而减少了搜索延迟和能耗。具体实现了42%的搜索时间减少和25%的能耗降低，属于电路创新。
▸电荷共享匹配线方案：引入电荷共享机制，动态分配匹配线上的电荷，有效减少了匹配线的充放电时间。该方案实现了11%的搜索时间减少和9%的能耗降低，属于方法创新。
▸细胞级比较逻辑：采用新型细胞级比较逻辑设计，优化了TCAM单元的比较效率，提高了整体搜索速度。这一创新在0.18微米CMOS工艺中验证，属于电路创新。
▸高性能低能耗TCAM系统：结合低电容匹配线和电荷共享方案，构建了一个高性能低能耗的TCAM系统，适用于高速查找密集型应用，属于系统创新。
Abstract
Emerging high-speed lookup-intensive applications are demanding ternary content addressable memories (TCAMs) with large word-sizes, which suffer from lower search speeds due to larger match line capacitance. Therefore, low-energy high-performance design techniques are needed, which improve the search speeds of TCAMs without increasing their power con- sumption. In this paper, we present a cell-level comparison logic and a charge-shared match line scheme. Both schemes reduce search time and energy in TCAMs. Measurement results of the above schemes, implemented in 0.18- m CMOS technology, show a search time reduction of 42% and 11%, and a search-energy reduction of 25% and 9%, respectively.