Abstract—An energy-efficient dual-band transceiver for unified
body sensor network is presented. The transceiver provides 30–70
MHz body channel communication (BCC) and 402–405 MHz medical
implant communication service (MICS). For low energy consumption,
the BCC and MICS band circuits in the receiver operate
concurrently with their front-ends shared. As a result, up to 30%
energy saving is achieved. The dual-band front-end circuits consist
of a cascaded LC tank LNA and a current-recycling concurrent-down
conversion mixer. The proposed LNA provides 16 dB
gains both in the BCC and MICS bands and suppresses interferences
coupled through the human body by more than 10 dB. For
BCC robustness, a variable adaptive frequency hopping is applied.
The transceiver fabricated with 0.18 m CMOS is fully compatible
with the FCC regulations for MICS and consumes 10.8 mW and 4.9
mW in its RX and TX modes, respectively. The adjacent channel
rejections are measured at 30 dB in the dual-bands.
Index Terms—Body channel communication, concurrent operation,
dual-band transceiver, medical implant communication service
(MICS), unified body sensor network.