The Low-Power Technology Research Of RF Receive Integrated Front-end

With the continuous development of wireless communcation application and the popularity of handheld devices, low power design has become an important problem of the concern of the industry and academia. Low power design will not only increase the standby time but also avoid reliability problem due to chip heat. Based on RF receive intgrated front end, this dissertation studies how to achive key performance under low power. Key perfomance include gain, bandwidth, noise figure and linearity, we discuss the constraint between the key performance and the power consumption and the low-power technology.For high gain wideband receive front-end, the constraint between gain bandwidth product and power consumption is discussed, complementary gain extending the bandwidth helps to reduce the power consumption to achieve certain gain bandwidth product. In the design of ultra-wideband balun-LNA(low noise amplifier), the existing broadband high-gain balun-LNA structures are summarized, also the reason of high power consumption is revealed. Current-reused complementary gain technology is put forward in balun-LNA design for the first time, current-reused common-gate amplifer and active-balun achieve high gain and wide bandwidth, significantly reducing the required power consumption. This LNA is implemented under TSMC130nm and measured, and this LNA achieves maximum gain of23dB and2.5GHz bandwidth under total power consumption of7.15mW. Based on this LNA, an ultra-wideband RF integrated receive front-end is implemented employing passive mixer and active inductor technology.For noise facor of the receive front-end, this dessertation summarizes and analyzes the exiting low power technology, revealing that positive feedback, active transconductance boost and noise cancellation improve noise performance at the cost of increased power. Current-reused noise cancellation technology is put forward for the first time, achieving cancellation of the main noise source with the active load, also it releaves the constraint between noise and power consumption. Further, the structure of double gm enhancement with current-reuse noise cancellation is put forward. The measurement shows that this structure achieves average noise figure of4.0dB under core power consumption of0.4mW.For linearity of the receive front-end, this dessertation summarizes the existing linearization technology of LNA. Current-reused distortion cancellation is put forward in LNA design for the first time, revealing the constraint between linearity and power consumption. This structure is designed under SMIC65nm, the simulation results show that this LNA achieves IIP3of19.6dBm and PldB of6.9dBm under power consumption of5.6mW, confirming the effectiveness of current-reused distortion cancellation.