Title :
Low power 2 Mbps radio telemetry system for biomedical applications
Author_Institution :
AGH Univ. of Sci. & Technol., Krakow, Poland
Abstract :
The paper presents a low power telemetry system for neural recording applications. The presented system operates in the 433 MHz ISM band. It offers a 2 Mbits/s throughput using a continuous phase frequency-shift keying (CPFSK) modulation. The presented transmitter is based on a free running, modified complementary Colpitts oscillator. Instead of using a separate power amplifier to drive the antenna, the VCO incorporates a loop antenna as its inductive element. To compensate for the oscillator frequency pulling due to changes in the antenna´s environment, supply voltage or temperature, a wide band high performance digital receiver was developed. The presented transmitter was implemented using a 180 nm CMOS process, and consumes just 450 uW.
Keywords :
CMOS integrated circuits; biomedical electronics; biomedical telemetry; continuous phase modulation; frequency shift keying; loop antennas; low-power electronics; neurophysiology; power amplifiers; radio transmitters; radiotelemetry; CMOS process; CPFSK; ISM band; antenna environment; continuous phase frequency-shift keying modulation; frequency 433 MHz; inductive element; loop antenna; low-power 2 Mbps radiotelemetry system; modified complementary Colpitts oscillator; neural recording applications; oscillator frequency pulling; power 450 muW; power amplifier; size 180 nm; supply voltage; temperature supply; transmitter; voltage-controlled oscillator; wide band high performance digital receiver; Delays; Demodulation; Frequency shift keying; Oscillators; Radio transmitters; Receivers; RF telemetry; continuous phase FSK modulation; neural recording;
Conference_Titel :
Circuit Theory and Design (ECCTD), 2013 European Conference on
Conference_Location :
Dresden
DOI :
10.1109/ECCTD.2013.6662296
