A Novel Low Power Consumption Soft Error-tolerant Latch
Funds:
The National Natural Science Foundation of China (61404043, 61674049, 61401137)
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摘要: 該文提出一種新型的C單元的連接方法,將距離輸出節(jié)點比較遠的P型和N型晶體管的柵端與C單元的輸出節(jié)點相連接,利用晶體管自身的反饋機制形成反饋路徑,實現(xiàn)了自恢復(fù)功能,因此大幅降低動態(tài)消耗和硬件開銷;采用點加強型C單元作為輸出級電路并進行優(yōu)化,使得電路抵御單粒子翻轉(zhuǎn)的能力更強;基于上述改進,搭建出一個新的抗軟錯誤鎖存器,將輸入信號經(jīng)過傳輸門以后接傳到輸出端,以降低輸入信號傳到輸出節(jié)點的延遲,利用節(jié)點之間的反饋比較機制進一步提升各個電路節(jié)點的臨界電荷量。在22 nm的先進工藝下進行仿真,實驗結(jié)果表明,提出的新型鎖存器電路不僅具有優(yōu)秀的抗軟錯誤能力,并且在功耗延遲積方面比現(xiàn)有的鎖存器電路性能提升了26.74%~97.50%。Abstract: A novel C-element connect method is proposed. The gate of P-type/N-type transistor is modified from the top/bottom of conventional C-element to connect to output, which takes advantage of the transistor,s own feedback mechanism to form a feedback path to achieve the self-recovery function. Therefore, the dynamic performance and hardware overhead are significant reduced. The node-enhanced C-element is used as the output stage circuit and optimized, making the circuit more resistant to single event upset. Based on the above description, a novel soft error-tolerant latch is proposed. Due to the only transmission gate in the shortest route between input and output, the delay in signal transmission is reduced. The critical charge can be further enhanced by using feedback comparison mechanism. Compared with latches in literature at 22 nm CMOS process, the results show that the proposed latch performs greater in reliability and the power delay products improvement of proposed latch achieves 26.74%~97.50%.
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Key words:
- Latch /
- Soft error /
- C-element /
- Self-recovery
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