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A 0.18μm CMOS gain-switched LNA and mixer with large dynamic range
摘    要:A 2.4GHz 0.18μm CMOS gain-switched single-end Low Noise Amplifier (LNA) and a passive mixer with no external balun for near-zero-IF (Intermediate Frequency)/RF (Radio Frequency) applications are described. The LNA, fabricated in the 0.18μm 1P6M CMOS technology, adopts a gain-switched technique to increase the linearity and enlarge the dynamic range. The mixer is an IQ-based passive topology. Measurements of the CMOS chip are performed on the FR-4 PCB and the input is matched to 50Ω. Combining LNA and mixer, the front-end measured performances in high gain state are: -15dB of Sll, 18.5dB of voltage gain, 4.6dB of noise figure, 15dBm of IIP3, 85dBm to -10dBm dynamic range. The full circuit drains 6mA from a 1.8V supply.

关 键 词:互补型金属氧化物半导体  低噪声放大器  噪声系数  增益关联动态阈
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