随着RFID、 可穿戴设备和物联网等应用的兴起,低吞吐率、 功耗和能耗敏感的芯片设计开始受到广泛的关注,基于阈值电压的低功耗电路设计成为新的发展方向.文中基于SMIC 0.13μm1 P6 M混合信号工艺,通过设计面向近阈值电压的标准逻辑库,在采用标准Top-Down设计流程的基础上,完成了一款近阈值低功耗8位微处理器的设计.封装后芯片的测试结果表明,该微处理器的最低工作电压可达0.2V,工作频率1kHz~25MHz.与基于传统逻辑库的微处理器比,在20 MHz的工作频率下,功耗降低了36%.%Facing the rise of new applications such as RFID, wearable devices and Internet of things, low-throughput but power energy sensitive IC design has drawn widespread attention. To achieve low power consumption, near-threshold digital circuit design is more and more popular. This paper designed a high-density near-threshold digital cell library based on SMIC 0. 13um1P6M mixed-signal technology. Based on this library, it designed and implemented a 8051 microprocessor with a typical top-down methodology. Tape-out result shows that this microprocessor can work with alowest voltage supply of 0. 2V, and its frequency covers a band from 1k to 25MHz. Compared with a same processor made using typical cell library, it can save about 36% power when working at 20MHz.
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