ABSTRACT

With the emerging of Internet of Things (IoT) industry, applications like smart power plugs, security ID tags, home automation and wearable electronic devices all make the demand for low-power WiFi chips impendency. In this paper, a low-power 2.4 GHz 802.11b/g/n WiFi system-on-chip (SoC) is designed and implemented with 40-nm CMOS process, with area of 8.1 mm². The low-power SoC integrates 32-bit microcontroller, 802.11b/g/n WiFi baseband, 2.4 GHz RF transceiver, ample memory space, ADC, 6-channel PWM, flexible I/O interfaces, multi-stage power management module, etc. It has several sleep modes with extremely low leakage current as 0.8 mA/12 µA in light/deep sleep mode and 0.4 µA in shutdown mode to reduce the power consumption. High performance is demonstrated, including Pout (−28 dB/-30 dB EVM) of 20.1 dBm/19.1 dBm and RX sensitivity of −76 dBm/-74 dBm meanwhile the total current of 148.5 mA/146.5 mA (TX) for 54 Mbps OFDM/HT20 MCS7.

摘要

随着物联网（IoT）行业的兴起，智能电源插头、安全ID标签、家庭自动化和可穿戴电子设备等应用都使得低功耗WiFi芯片的需求迫切。本文采用40 nm CMOS工艺设计并实现了低功耗2.4 GHz 802.11b/g/n WiFi片上系统(SoC)，面积为8.1 mm ²。该低功耗SoC集成了32位微控制器、802.11b/g/n WiFi基带、2.4GHz射频收发器、充足的存储空间、ADC、6通道PWM、灵活的I/O接口、多级电源管理模块等具有多种睡眠模式，漏电流极低，浅/深睡眠模式下漏电流为 0.8 mA/12 µA，关断模式下漏电流为 0.4 µA，以降低功耗。展示了高性能，包括 20.1 dBm/19.1 dBm 的 Pout (−28 dB/-30 dB EVM) 和 −76 dBm/-74 dBm 的 RX 灵敏度，同时 54 Mbps 的总电流为 148.5 mA/146.5 mA (TX) OFDM/HT20 MCS7。