For the biomedical implantable applications, inductive link has been widely used for both power and data transferring. One major problem of the existing design is the low power transfer efficiency due to the weak coupling.
One power regulation loop is established to adjust the sending power in a dynamic way. This power regulation loop is based on a reliable, efficient data communication between the implant and the external controller. BPSK and LSK modulation methods are used for data downlink and uplink respectively.
Three crucial blocks of this wireless interface (power recovery module, A/D converter and BPSK demodulator) have been implemented in CMOS 0.18 um technology. Experimental result is expected to be provided soon.
System assembly and integration in several applications constitute the next step of this project.
