Ultra-low power 50/60Hz notch filter for biomedical signal acquisition using 32nm ± 0.15V Bulk-Driven subthreshold CMOS OTAs
- Resource Type
- Conference
- Authors
- Ansari, Mohd. Samar; Sinha, Rishika; Khot, Sourabh
- Source
- 2017 4th International Conference on Electrical and Electronic Engineering (ICEEE) Electrical and Electronic Engineering (ICEEE), 2017 4th International Conference on. :309-313 Apr, 2017
- Subject
- Components, Circuits, Devices and Systems
Transconductance
Band-pass filters
Notch filters
MOSFET
Capacitors
Low pass filters
analog front-end circuit
biomedical signal acquisition
bulk-driven MOSFETs
operational transconductance amplifier
notch filter
subthreshold CMOS design
- Language
This paper deals with the design of continuous-time analog band-reject filter in 32 nm CMOS technology intended for biomedical applications using analog front-end (AFE). The work focuses on miniaturization and ultra low power consumption, needed in implantable devices running on battery. The circuit can process signals in the frequency range of 0.01 Hz to 300 Hz while filtering AC mains frequency (50 or 60 Hz). A sixth-order notch filter is implemented using Bulk-Driven Operational Transconductance Amplifiers in an OTA-C topology. The designed OTA has an ultra low transconductance: 65.4pA/V. The notch produces an attenuation of 17 dB at the mains frequency. The complete AFE was observed to consume 18.81pW of power at ±0.15V supply.