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Low-power low data rate FM-UWB receiver front end

Low-power low data rate FM-UWB receiver front end

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This study introduces a frequency modulated ultra-wideband (FM-UWB) receiver optimised for low power and fast start-up. The receiver consists of a front end amplifier converting a frequency modulated signal to an amplitude modulated signal which is applied to an envelope detector. The receiver front end is for 500 MHz channels centred at 3450 and 3950 MHz. The amplifier uses passive gain and four cascaded gain stages to achieve high radio-frequency gain without the need for super-regeneration. By simplifying the architecture this way, the front end has a 5 μs wake-up time to enable efficient duty-cycling. The measured front end receives a signal at −68 dBm while consuming 600 μW of power (excluding a test buffer) from a 1 V supply. Fabrication was done using the IBM 130-nm CMOS technology on a 1 mm × 1 mm loose die.

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