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本论文设计并实现了一个用于UWB脉冲体制的3-5GHz超宽带平坦增益的全差分低噪声放大器。在电路设计上,采用了一种增益平坦化技术,并且利用了串连建峰与并联建峰技术,分别实现了宽带的输入匹配与整个电路大的增益带宽积。同时,利用反馈技术,进一步拓展带宽和削减带内增益波动。此LNA才用SMIC 0.18um CMOS射频工艺流片验证。测试结果表面电路3dB带宽为2.4~5.5GHz,最高增益可达13.2dB,在3-5GHz的带内增益波动仅为+/- 0.45dB,最低噪声系数为3.2dB.输入匹配性能良好,在2.9~5.4GHz范围内S11<-13dB,电路的输入P1dB为-11.7dBm@5GHz,电路采样1.8v供电,整个差分电路消耗电流9.6mA. 相似文献
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This paper introduces the design of a l.8 V low dropout voltage regulator (LDO) and a foldback current limit circuit which limits the output current to 3 mA when load over-current occurs. The LDO was implemented in a 0.18 μm CMOS technology. The measured result reveals that the LDO s power supply rejection (PSR) is about -58dB and -54dB at 20Hz and 1kHz respectively,the response time is 4μs and the quiescent currentis 20μA. The designed LDO regulator can work with a supply voltage down to 2.0 V with a drop-out voltage of 200 mV at a maximum load current of 240 mA. 相似文献
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A 3-5 GHz broadband flat gain differential low noise amplifier(LNA) is designed for the impulse radio ultra-wideband(IR-UWB) system.The gain-flatten technique is adopted in this UWB LNA.Serial and shunt peaking techniques are used to achieve broadband input matching and large gain-bandwidth product(GBW).Feedback networks are introduced to further extend the bandwidth and diminish the gain fluctuations.The prototype is fabricated in the SMIC 0.18μm RF CMOS process.Measurement results show a 3-dB gain band... 相似文献
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A differential power amplifier(PA),designed using the linear-phase filter model,for a BPSK modulated ultra-wideband(UWB) system operating in the 3-5 GHz frequency range is presented.The proposed PA was fabricated using 0.18μm SMIC CMOS technology.To achieve sufficient linearity and efficiency,this PA operates in the class-AB region,delivering an output power of 8.5 dBm at an input-1 dB compression point of -0.5 dBm.It consumes 28.8 mW, realizing a flat gain of 9.11±0.39 dB and a very low group delay ripp... 相似文献
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