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A 400MHz on-off keying transceiver for medical implant applications is presented. The transceiver achieves ultra-low power and high sensitivity with an analog “quadratic sum” demodulation scheme, which enables the using of a low intermediate frequency and a free-running oscillator for power saving. A new current-reuse structure and an inductor-sharing technique for front-end are also introduced to further reduce power consumption. The transceiver is implemented in 0.18μm CMOS process with 3.18mm2 chip area. At 2 Mbps data rate, the receiver achieves energy efficiency of 1.71nJ/bit with sensitivity of -80.2dBm for 10-3 BER, and the transmitter achieves energy efficiency of 1.53nJ/bit with -2.17dBm output power.
ESSCIRC (ESSCIRC), 2011 Proceedings of the
Date of Conference: 12-16 Sept. 2011