Abstract: A wireless telemetry module and associated method reject interference in a received signal. The wireless telemetry module includes an antenna receives a communication signal transmitted at a desired channel frequency and having a channel bandwidth. A transceiver is controlled to operate in receiving and transmitting modes by a processor. An interference rejection module receives control signals from the processor corresponding to the desired channel frequency and is coupled between the antenna and the transceiver when the transceiver is operating in the receiving mode.

Abstract: An implantable medical device (IMD) can include an implantable pulse generator (IPG), such as a cardiac pacemaker or an implantable cardioverter-defibrillator (ICD). At least one lead is coupled to the IMD at a proximal end to the anatomic tissue of a patient at a distal end. According to various embodiments, a one-quarter wavelength open circuit terminated transmission line forms a stub filter to attenuate an interfering signal, such as those created by an MRI scanner during an MRI procedure. By cancelling the interfering signal, both the IMD and patient are protected from any adverse effects caused by the interfering signal.

Abstract: A wireless telemetry module and associated method reject interference in a received signal. The wireless telemetry module includes an antenna receives a communication signal transmitted at a desired channel frequency and having a channel bandwidth. A transceiver is controlled to operate in receiving and transmitting modes by a processor. An interference rejection module receives control signals from the processor corresponding to the desired channel frequency and is coupled between the antenna and the transceiver when the transceiver is operating in the receiving mode.

Abstract: Techniques are described for protecting an implantable medical device (IMD) from effects caused by interfering radiated fields. An IMD incorporating these techniques may include a telemetry conduction path that includes a first end electrically coupled to a telemetry antenna and a second end electrically coupled to a telemetry circuit disposed within a housing of the IMD. The IMD may further include a stub filter electrically coupled to the telemetry conduction path and configured to attenuate an interfering signal induced in the telemetry conduction path. The stub filter may include a dielectric and a conductor disposed within the dielectric. The conductor may include a first end electrically coupled to the telemetry conduction path and a second end configured in an open circuit configuration. The conductor may have an electrical length approximately equal to one-quarter wavelength of the interfering signal when propagating through the stub filter.

Abstract: A wireless telemetry module and associated method reject interference in a received signal. The wireless telemetry module includes an antenna receives a communication signal transmitted at a desired channel frequency and having a channel bandwidth. A transceiver is controlled to operate in receiving and transmitting modes by a processor. An interference rejection module receives control signals from the processor corresponding to the desired channel frequency and is coupled between the antenna and the transceiver when the transceiver is operating in the receiving mode.

Abstract: An implantable medical device (IMD) can include an implantable pulse generator (IPG), such as a cardiac pacemaker or an implantable cardioverter-defibrillator (ICD). At least one lead is coupled to the IMD at a proximal end to the anatomic tissue of a patient at a distal end. According to various embodiments, a one-quarter wavelength open circuit terminated transmission line forms a stub filter to attenuate an interfering signal, such as those created by an MRI scanner during an MRI procedure. By cancelling the interfering signal, both the IMD and patient are protected from any adverse effects caused by the interfering signal.

Abstract: A wireless telemetry module and associated method reject interference in a received signal. The wireless telemetry module includes an antenna receives a communication signal transmitted at a desired channel frequency and having a channel bandwidth. A transceiver is controlled to operate in receiving and transmitting modes by a processor. An interference rejection module receives control signals from the processor corresponding to the desired channel frequency and is coupled between the antenna and the transceiver when the transceiver is operating in the receiving mode.

Abstract: A method is provided for controlling the quiescent current of a power amplifier in a wireless communication device, the amplifier configured to amplify an applied communication signal and employing biasing controlled by a reference voltage. In a preferred embodiment, the method includes: measuring the operating current of the communication device with no communication signal applied to the amplifier and with the reference voltage set to zero, increasing the reference voltage, while continuing to measure the operating current, until the difference between the operating current at a particular reference voltage and the operating current with the reference voltage set to zero reaches a pre-selected current value, and storing a digital value corresponding to the particular reference voltage. The pre-selected current value is preferably determined by characterizing a sufficient sample of amplifiers (e.g.

Abstract: Disclosed is a coupling arrangement which comprises an enclosed cavity with an aperture in one of its walls. An adjustable probe is positioned within the aperture to allow energy within the cavity to be coupled onto the probe. A microstripline transition is connected at one end to the adjustable probe and at the other end to external circuitry. The arrangement allows variable coupling of energy within the cavity onto the probe without requiring cumbersome procedures for fine adjustment.

Abstract: An electric field probe is disclosed as having an arcual shaped transmission line which is mounted over a substrate having a corresponding arcual shaped transmission line deposited thereon. The two arcual shaped transmission members overlap such that the electric field energy sampled by the probe may be communicated to a monitoring circuit or the like. Rotating the probe, varies the portion of the arcual shaped members that overlap thereby adjusting the physical and electrical length of the transmission line. Accordingly, the phase of the field energy will shift as viewed from the output port.