High-speed start-up and low-power decoding circuit for body-centric communications

We present a high-speed start-up and low-power decoding circuit for body-centric communications. The Manchester code that is currently used for Ethernet (10BASE-T), noncontact IC cards, and RFID systems, requires a phase-locked loop because intervals of the state transition change. In the proposed circuit, state transitions occur periodically at the center of a waveform owing to the use of an encoding method involving several waveforms.