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A Low-Power WCDMA Transmitter With an Integrated Notch Filter Ahmad Mirzaei and
一种采用集成陷波滤波器的低功耗WCDMA发射机，通过反馈滤波技术降低接收带噪声。
65nm CMOS, 160 dBc/Hz at 80-MHz offset, 65 mW
WCDMA发射机陷波滤波器反馈滤波接收带噪声稳定性分析
▸集成陷波滤波器技术
▸反馈滤波技术消除外部SAW滤波器需求
▸稳定性分析确保宽范围环路增益下的稳定性
Abstract
A filtering technique to attenuate the receive-band
noise enables a 65-nm CMOS WCDMA transmitter to achieve
an output noise level of
160 dBc/Hz at 80-MHz offset, while
dissipating 65 mW. Using a feedback filtering technique, the
circuit introduces a null with an arbitrary width at the receive
frequency and eliminates the need for an external SA W filter. A
stability analysis is performed to choose the most suitable archi-
tecture for the feedback path, which ensures stability over a wide
range of l