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A Leakage Current Replica Keeper for Dynamic Circuits | IEEE Journals & Magazine | IEEE Xplore

A Leakage Current Replica Keeper for Dynamic Circuits


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...Show More

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 times 72 bits, 3W/4R embedded SRAM macro using a four-stage LCR-keeper domino structure for a read-out circuit
Published in: IEEE Journal of Solid-State Circuits ( Volume: 42, Issue: 1, January 2007)
Page(s): 48 - 55
Date of Publication: 26 December 2006

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