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 pi/4 DQPSK signals at 2.4GHz. Modulation at 1/3rd the RE frequency reduces the total power consumption and enables channel selection using a PLL running at 800MHz. The prototype transmitter has an energy efficiency of 2.5n.J/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 194 mu W which is 0.5X lower than the state-of-the-art.