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In this paper, an approach to map the Bluetooth and 802.11b standards specifications into an architecture and specifications for the building blocks of a dual-mode direct conversion receiver is proposed. The design procedure focuses on optimizing the performance in each operating mode while attaining an efficient dual-standard solution. The impact of the expected receiver nonidealities and the characteristics of each building block are evaluated through bit-error-rate simulations. The proposed receiver design is verified through a fully integrated implementation from low-noise amplifier to analog-to-digital converter using IBM 0.25-μm BiCMOS technology. Experimental results from the integrated prototype meet the specifications from both standards and are in good agreement with the target sensitivity.