Abstract
An ultra-low-power (ULP) CMOS full-band (780/868/915/2400 MHz) ZigBee receiver front-end is presented. The front-end consists of a wideband common-gate LNA and an I/Q current-commutating mixer. Current reuse and active trans-conductance (gm ) boosting techniques are utilised in this design. Details on design and optimisation method for the proposed ULP receiver front-end are provided. Measurement results for 180 nm RF CMOS implementation show the front-end has a conversion gain of 25.2 dB at sub-GHz bands and 17.5 dB at 2.4 GHz band. The minimum noise figure at sub-GHz bands is 7.3 dB. The receiver front-end consumes only 0.826 mA from a 1.0 V DC supply and the size of the core circuit is 0.052 mm2.
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