본문 바로가기
HOME> 논문 > 논문 검색상세

논문 상세정보

Sense Amplifier Half-Buffer (SAHB) A Low-Power High-Performance Asynchronous Logic QDI Cell Template

Chong, Kwen-Siong ; Ho, Weng-Geng ; Lin, Tong ; Gwee, Bah-Hwee ; Chang, Joseph S. ;
  • 초록  

    We propose a novel asynchronous logic (async) quasi-delay-insensitive (QDI) sense-amplifier half-buffer (SAHB) cell design approach, with emphases on high operational robustness, high speed, and low power dissipation. There are five key features of our proposed SAHB. First, the SAHB cell embodies the async QDI 4-phase ( $4\phi )$ signaling protocol to accommodate process-voltage–temperature variations. Second, the sense amplifier (SA) block in SAHB cells embodies a cross-coupled latch with a positive feedback mechanism to speed up the output evaluation. Third, the evaluation block in the SAHB comprises both nMOS pull-up and pull-down networks with minimum transistor sizing to reduce the parasitic capacitance. Fourth, both the evaluation block and SA block are tightly coupled to reduce redundant internal switching nodes. Fifth, the SAHB cell is designed in CMOS static logic and hence appropriate for full-range dynamic voltage scaling operation for $\text{V}_{\mathrm {\mathbf {DD}}}$ ranging from nominal voltage (1 V) to subthreshold voltage ( $\sim 0.3$ V). When six library cells embodying our proposed SAHB are compared with those embodying the conventional async QDI precharged half-buffer (PCHB) approach, the proposed SAHB cells collectively feature simultaneous $\sim 64$ % lower power, $\sim 21$ % faster, and $\sim 6$ % smaller IC area; the PCHB cell is inappropriate for subthreshold operation. A prototype 64-bit Kogge-Stone pipeline adder based on the SAHB approach (at 65 nm CMOS) is designed. For a 1-GHz throughput and at nominal $\text{V}_{\mathrm {\mathbf {DD}}}$ , the design based on the SAHB approach simultaneously features $\sim 56$ % lower energy and $\sim 24$ % lower transistor count advantages than its PCHB counterpart. When benchmarked against the ubiquitous synchronous logic counterpart, our SAHB dissipates $\sim 39$ % lower energy at the 1-GHz throughput.


 활용도 분석

  • 상세보기

    amChart 영역
  • 원문보기

    amChart 영역

원문보기

무료다운로드
  • 원문이 없습니다.

유료 다운로드의 경우 해당 사이트의 정책에 따라 신규 회원가입, 로그인, 유료 구매 등이 필요할 수 있습니다. 해당 사이트에서 발생하는 귀하의 모든 정보활동은 NDSL의 서비스 정책과 무관합니다.

원문복사신청을 하시면, 일부 해외 인쇄학술지의 경우 외국학술지지원센터(FRIC)에서
무료 원문복사 서비스를 제공합니다.

NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.

이 논문과 함께 출판된 논문 + 더보기