Patent ID: 7957813
Filing Date: 2011-06-07
Classification: A61N

Abstract:
1. An implantable medical device, comprising: a radio frequency transceiver configured to receive at least one radio frequency signal and identify if the signal is a valid communications signal; a counter configured to maintain a count indicative of a quantity of times valid communication signals within the at least one radio frequency signal have been identified following a transition to a fully awakened mode of a staged signal detection scheme or a quantity of times valid communication signals have not been identified following a transition to a fully awakened mode of a staged signal detection scheme; a parameter adapter coupled to receive the count from the counter and configured to adapt a signal detection parameter based on the count; and a comparator coupled to receive an adapted signal detection parameter from the parameter adapter and configured to determine during a partially awakened mode of the staged signal detection scheme whether to invoke the fully awakened mode to enable communication with an external device, wherein the determination is based on the received at least one radio frequency signal and the adapted signal detection parameter.