WIRELESS DATA AND POWER TRANSFER OVER AN INDUCTIVE TELEMETRY LINK

摘要

A telemetry device includes a resonant inductive link with a primary LC tank and secondary LC tank configured to resonate at a carrier frequency. A modulator assembly in communication with the secondary LC tank implements data-synchronized cyclic on-off keying modulation (COOK) to periodically create a short across the secondary LC tank in response to a pulse from a phase selector and phase-locked loop. During the full cycle-length of the short, data can be transmitted across the inductive link while the charge across the secondary LC tank is preserved. Power may be transferred across the link during non-shorted cycles.

主权项

1. A telemetry device, comprising:
an inductive link comprising an external LC tank and an internal LC tank, wherein the inductive link is resonant at a carrier frequency comprising a plurality of cycles; a switch configured for shorting the internal LC tank in response to a data-synchronized modulation signal; and a modulator assembly configured to implement cyclic on-off keying to open and close the switch, wherein the switch is closed for data transmission and open for power transfer.