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A Leakage Current Replica Keeper for
提出一种用于动态多米诺电路的漏电流复制保持器，通过模拟电流镜复制下拉堆栈的漏电流，实现工艺、电压和温度的跟踪。
90-nm CMOS, 1.2-V, 30% more legs at same noise margin, 25%–40% faster
漏电流复制保持器动态多米诺电路电流镜噪声容限嵌入式SRAM
▸使用模拟电流镜复制漏电流
▸跟踪工艺、电压和温度变化
▸与传统保持器相比支持更多腿的AND-OR电路设计
Abstract
We present a leakage current replica (LCR) keeper for dynamic domino gates that uses an analog current mirror to replicate the leakage current of a dynamic gate pull-down stack and thus tracks process, voltage, and temperature. The proposed keeper has an overhead of one field-effect transistor per gate plus a portion of a shared current mirror. Techniques for properly sizing LCR keepers are presented. Using these sizings, LCR keepers allow design of AND–OR circuits with 30% more legs than conventional keepers at the same noise margin in a 90-nm, 1.2-V CMOS logic process. Furthermore, 16–24-leg dynamic AO circuits are 25%–40% faster when using the replica keeper. We demonstrated the circuit operation on a 1024 words 72 bits, 3W/4R embedded SRAM macro using a four-stage LCR-keeper domino structure for a read-out circuit.