Implantable medical device short-range radio synchronization

An implantable component of an implantable medical device system, comprising:

• a first receiver configured to receive signals via a first communication link;
• a short-range radio transceiver configured to receive data via a short-range radio link, wherein the short-range radio transceiver is configured to operate at a pre-determined carrier frequency;
• and
• a reference clock extractor configured to generate, based on frequency information extracted from the signals received via the first communication link, a reference clock for use by the short-range radio transceiver in communication via the short-range radio link.

An implantable component of an implantable medical device system, comprising:

• a first implantable coil coupled to a first external component via a closely-coupled link and configured to receive closely-coupled signals;
• a reference clock extractor circuit configured to extract frequency information from the closely-coupled signals received via the first implantable coil and to generate a reference clock based on the frequency information extracted from the closely-coupled signals;
• and
• a short-range radio transceiver configured to use the reference clock to at least one of transmit data signals to, or receive data signals from, a second external device via a short-range radio link.