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RF modules speed time-to-market for implantable medical device designers

January 09, 2013 // Paul Buckley

RF modules speed time-to-market for implantable medical device designers

Microsemi Corporation has introduced a complete medical network (med-net) radio link for implantable medical devices such as pacemakers, cardiac defibrillators and neurostimulators.


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The new radio link is comprised of the company's ZL70321 implantable radio module and its ZL70120 base station radio module for external device controllers. Both modules are based on Microsemi's ultra low power (ULP) ZL70102 medical implantable communications service (MICS) band radio transceiver chip, which supports a high data rate RF link for medical implantable communication applications.

Radio frequency technology is increasingly being used in a wide variety of medical implantable applications including cardiac care, physiological monitoring (e.g. insulin), pain management and obesity treatments.

The ZL70321 implantable module implements all RF-related functions needed to deploy the implant node in a MICS RF telemetry system. The integrated antenna tuning circuit allows the module to be used with a wide range of implant antennas (nominal antenna impedance is 100+j150 ). The module provides the following major blocks a ZL70102-based MICS RF transceiver with integrated matching network, SAW filters for suppression of unwanted blockers and antenna tuning; a 2.45 GHz wake-up receiver matching network; an integrated 24 MHz reference frequency crystal; and decoupling capacitors.

The ZL70120 base station radio module also includes all RF-related functions required to deploy the external device functions in a MICS-band RF telemetry system. It is designed to meet regulatory requirements including FCC, ETSI and IEC. Additional features include integrated matching network, bandpass filters for suppression of unwanted blockers and an extra receiver LNA for maximized receiver sensitivity.
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