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CMOS energy efficient integrated radios for emerging low power standards

This paper describes IEEE 802.15.6 standard compliant 2.36-2.484GHz transmitter and receiver frontends suitable for emerging low power standards. The transmitter digitally multiplexes the appropriate phases from an 800MHz poly-phase filter output to generate π/4 DQPSK signals at 2.4GHz. Modulation at 1/3rd the RF frequency reduces the total power consumption and enables channel selection using a PLL running at 800MHz. The prototype transmitter has an energy efficiency of 2.5nJ/bit at 1.2Mbps while delivering -10dBm RF power. The receiver uses a passive coupling based frequency translated mutual noise cancellation technique which allows for low supply operation thereby saving power. The FOM is 10dB higher than the state-of-the-art and the power consumption is 194μW which is 0.5X lower than the state-of-the-art.