An ultra-wideband low power-consumption low noise-figure high-gain RF power-efficient DC-3.5-GHz CMOS integrated sampling mixer subsystem

[摘要]：An ultra-wideband CMOS integrated sampling mixer subsystem was designed and fabricated using Jazz Semiconductor's 0.18-mu m enhanced RF CMOS process. A two-stage switching strategy is implemented to synchronously merge a low-noise amplifier (LNA) with a sampler to achieve high gain, fast sampling, low noise figure, low power consumption, and enhanced RF power efficiency. The LNA and sample-and-hold capacitor are switched using two synchronized strobes generated on-chip. Characteristics of the sampling strobe, the sampling clock jitter, and their effects on the sampling bandwidth are discussed. Measured results show unprecedented performance of 9-12-dB voltage conversion gain, 16-25-dB noise figure, and power consumption of only 21.6 mW (with buffer) and 11.7 mW (without buffer) across dc to 3.5 GHz with 100-MHz sampling frequency.

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