High Data-rate Bi-directional CMOS Power/Data Link For Implanted Medical Devices

Presented here is a power/data telemetry IC with a new data modulation scheme and simultaneous power transfer through a single inductive link. Data-driven synchronized single-cycle shorting of the secondary LC tank conserves reactive power while inducing an instantaneous voltage change at the primary side. Cyclic on-off keying time-encoded symbol mapping of the shorting cycle allows transmission of two data bits per four carrier cycles with simultaneous power transfer during non-shorting cycles. All timing control signals for rectification and data transmission are generated from a low-power clock recovery comparator and 22-phase 2x PLL.   The 1-mm2  65-nm CMOS IC delivers up to 6.3-mW power and transmits 6.78-Mbps data with a BER of less than 5.9×10-7 over a single 1-cm 13.56-MHz inductive link. Figure (a) System Diagram                                           Figure (b) Chip micrograph

9872089

Tech ID/UC Case

24961/2014-331-0

Related Cases

2014-331-0

USA