Patent ID: 7848813

Claim:
An implant monitor for monitoring an implantable medical device (IMD), the monitor comprising: an RF receiver adapted to receive an RF signal transmitted from the IMD, the RF signal modulated with at least first and second electrogram (EGM) data, the RF receiver configured to demodulate the first and second EGM data from the received RF signal, the RF receiver comprising a telemetry interface adapted to receive the modulated RF signals transmitted from the IMD and configured to demodulate one or more data frames therefrom, each data frame including at least the first and second EGM data; a frame decoder circuit coupled to receive the demodulated data frames and configured to extract the first and second EGM data therefrom, respectively; a sample-rate oscillator circuit operable to supply data sample command signals; first and second EGM data buffer circuits in operable communication with the frame decoder, each EGM data buffer coupled to receive the data sample command signals and operable, in response thereto, to selectively retrieve the first and second EGM data, respectively, from the frame decoder; a frequency modulation circuit coupled to receive the demodulated first and second EGM data and a substantially fixed-frequency signal and configured to frequency modulate the fixed-frequency signal based on the demodulated first and second EGM data and supply first and second frequency modulated EGM data signals; and an amplifier circuit coupled to receive the first and second frequency modulated EGM data signals and configured to supply a composite frequency modulated signal.