No abstract

-A novel capacitor-less amplitude demodulation receiver architecture is used in the design of a downlink transceiver for a wireless implantable glucose sensing biosystem. The transceiver system is composed of a high efficiency class E power amplifier utilized as an external transmitter and an implantable data detection receiver, communicating through an inductive link. Amplitude shift keying digital scheme is used to externally modulate the 2 MHz carrier frequency at a data rate of 2 kbps. Transmitter spectral power was measured at 1.51 mW during transmission in air and data was successfully decoded at an effective distance of 3 cm between antennas. Implantable receiver off-chip antenna is implemented using a ferrite core, wire wound coil. A low power, low area consumption implantable receiver module is produced in the research with internal receiver core area measuring at 64.8μm by 55.9μm. Average power dissipation is 1.15 mW at a 3.3V single rail power supply, the lowest to date. Power consumption was measured at both 10 pF and 100 pF load capacitances. Implantable receiver chip was designed and implemented using a TSMC 0.35μm mixed-signal 2P4M 3.3V/5V standard CMOS process.