Abstract :
The main goal of this work is to fabricate a miniaturized, low power, bi-directional wireless communication system that can be used for in vivo pressure monitoring. The system prototype consists of miniature FSK transceiver integrated with Microcontroller unit (MCU) in one small package, chip antenna, and capacitive interface circuitry based on Delta-sigma (SigmaDelta) modulator. At the base station side, an FSK receiver/transmitter is connected to another MCU unit, which send the received data or received instructions from a PC through a graphical user interface GUI. Industrial, Scientific and Medical (ISM) band RF (433 MHz) was used to achieve half duplex communication between the two sides. A digital filtering has been used in the capacitive interface to reduce noise effects forming capacitance to digital converter (CDC). All the modules of the mixed signal system are integrated in a printed circuit board (PCB) of size 22.46 x 20.168 mm.
Keywords :
biomedical telemetry; biosensors; delta-sigma modulation; digital filters; frequency shift keying; graphical user interfaces; microcontrollers; patient monitoring; pressure measurement; pressure sensors; transceivers; FSK receiver; FSK transceiver; FSK transmitter; GUI; PCB; SigmaDelta modulator; bidirectional wireless communication system; biomedical pressure monitoring; capacitance to digital converter; capacitive interface circuitry; chip antenna; delta-sigma modulator; digital filtering; frequency 433 MHz; graphical user interface; half duplex communication; in vivo pressure monitoring; microcontroller unit; mixed signal system; noise effects; printed circuit board; size 20.168 mm; size 22.46 mm; telemetry platform system; Bidirectional control; Biomedical monitoring; Frequency shift keying; Graphical user interfaces; In vivo; Microcontrollers; Prototypes; Telemetry; Transceivers; Wireless communication;
