Title :
An integrated chip coil sensor and instrumentation amplifier for bio-magnetic signal acquisition
Author :
Nair, Vijith Vijayakumaran ; Jin Hwan Youn ; Jun Rim Choi
Author_Institution :
Sch. of Electron. Eng., Kyungpook Nat. Univ., Daegu, South Korea
Abstract :
This paper presents a miniaturized magnetic sensor chip for bio-magnetic signal measurements. The sensor fabricated in 0.18 μm CMOS process embeds an inductance coil and instrumentation amplifier that provides excellent sensitivity and low reference noise level in comparison to the state of art. The integrated sensor with frequency band between 50 Hz and 5 KHz illustrates bandpass filter characteristics which attenuates the low and high frequency noise from the external environment. The signal sensitivity of the device is 3.2 fT/μV and inferred noise at 300 Hz is 29 fT/√Hz. The sensor is used for bio-magnetic signal acquisition.
Keywords :
CMOS integrated circuits; band-pass filters; biomagnetism; biomedical electronics; biomedical equipment; biomedical measurement; instrumentation amplifiers; magnetic sensors; medical signal detection; signal denoising; CMOS process; bandpass filter characteristics; biomagnetic signal acquisition; biomagnetic signal measurements; frequency 50 Hz to 5 kHz; frequency band; high frequency noise attenuation; inductance coil; inferred noise; instrumentation amplifier; integrated chip coil sensor; low frequency noise attenuation; low reference noise level; miniaturized magnetic sensor chip; signal sensitivity; size 0.18 mum; Bandwidth; Gain measurement; Instruments; Noise; Power measurement; Superconducting magnets; Biomagnetic signals; Instumentation Amplifier; Integrated Chip; Sensor Coil;
Conference_Titel :
Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS), 2015 Transducers - 2015 18th International Conference on
Conference_Location :
Anchorage, AK
DOI :
10.1109/TRANSDUCERS.2015.7181241
