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Low-Power Quadrature Receivers for ZigBee IEEE 802154 Applications
介绍了两款用于ZigBee的低功耗紧凑型正交接收器,通过电流复用和振荡器共享降低功耗和面积。
3.6 mW功耗,0.23 mm²/0.35 mm²面积
低功耗正交接收器ZigBee电流复用振荡器共享
▸创新点1:电流复用技术(电路创新) - 通过在I和Q路径中共享电流,显著降低了功耗,同时保持了电路性能,实现了3.6 mW的低功耗设计。
▸创新点2:振荡器共享技术(电路创新) - 在I和Q路径中共享振荡器谐振腔,减少了芯片面积,但通过增益和相位匹配技术确保了信号完整性,使芯片面积仅为0.23 mm²。
▸创新点3:RF路径正交生成技术(方法创新) - 提出了两种在RF路径中生成正交信号的方法,避免了在本地振荡器级别生成正交信号的高功耗问题,同时优化了输入匹配策略。
▸创新点4:低中频架构与基带滤波(系统创新) - 采用低中频架构并结合可变增益复数滤波器,实现了信道选择和镜像抑制,提升了接收机的整体性能。
Abstract
Two very compact and low power quadrature re-
ceivers for ZigBee applications are presented. Area and power
savings are obtained through both current reuse and oscillator
tank sharing between the I and Q paths. Since this choice can
cause I and Q amplitude/phase mismatches, the conversion gain
is analyzed and a technique to minimize these errors is imple-
mented. Moreover, since using a single tank makes quadrature
generation at the local oscillator level costly and power-hungry,
two alternative